首页 > 最新文献

2010 6th Iranian Conference on Machine Vision and Image Processing最新文献

英文 中文
A novel smart and fast searching method for star identification algorithm 一种新的智能快速搜索恒星识别算法
Pub Date : 2010-10-01 DOI: 10.1109/IRANIANMVIP.2010.5941180
Shahin Sohrabi, A. Shirazi, Siavash Ghalamifard
The key performances of the star pattern recognition algorithms are the identification efficiency and the time consumed. In the past decades, much effort has been made in database search methods and lots of them are made out. To reduce the computation database search time a novel technique using star magnitudes is proposed. Also, we propose a novel, smart and fast star identification algorithm by using this accurate and fast searching method. The simulation results based on the Desktop Universes images show that the proposed star identification and database search algorithm can achieve both high accuracy and fast recognition. The database search and star features extraction time is o(n). In addition to, since the quality of star images play an important role in improving accuracy of star pattern recognition algorithm, therefore for image pre-processing we propose a fuzzy edge detection technique. This method highly affects noise cancellation, star features extraction, database production and matching algorithm.
星型模式识别算法的关键性能是识别效率和耗时。在过去的几十年里,人们在数据库检索方法方面做了大量的工作,并提出了许多数据库检索方法。为了减少计算数据库的搜索时间,提出了一种利用星等的新方法。并利用这种精确快速的搜索方法,提出了一种新颖、智能、快速的恒星识别算法。基于桌面宇宙图像的仿真结果表明,所提出的恒星识别和数据库搜索算法能够实现高精度和快速的识别。数据库搜索和恒星特征提取时间为0 (n)。此外,由于星图的质量对提高星图模式识别算法的精度起着重要的作用,因此我们提出了一种模糊边缘检测技术用于图像预处理。该方法对噪声消除、星点特征提取、数据库生成和匹配算法影响很大。
{"title":"A novel smart and fast searching method for star identification algorithm","authors":"Shahin Sohrabi, A. Shirazi, Siavash Ghalamifard","doi":"10.1109/IRANIANMVIP.2010.5941180","DOIUrl":"https://doi.org/10.1109/IRANIANMVIP.2010.5941180","url":null,"abstract":"The key performances of the star pattern recognition algorithms are the identification efficiency and the time consumed. In the past decades, much effort has been made in database search methods and lots of them are made out. To reduce the computation database search time a novel technique using star magnitudes is proposed. Also, we propose a novel, smart and fast star identification algorithm by using this accurate and fast searching method. The simulation results based on the Desktop Universes images show that the proposed star identification and database search algorithm can achieve both high accuracy and fast recognition. The database search and star features extraction time is o(n). In addition to, since the quality of star images play an important role in improving accuracy of star pattern recognition algorithm, therefore for image pre-processing we propose a fuzzy edge detection technique. This method highly affects noise cancellation, star features extraction, database production and matching algorithm.","PeriodicalId":350778,"journal":{"name":"2010 6th Iranian Conference on Machine Vision and Image Processing","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131334515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A novel Iris segmentation method based on balloon active contour 一种基于气球活动轮廓的虹膜分割新方法
Pub Date : 2010-10-01 DOI: 10.1109/IRANIANMVIP.2010.5941165
Seyyed Mohammad Talebi, A. Ayatollahi, S. Moosavi
Image segmentation is a tool which is widely used in many applications related to image processing, and it comprises one of the most difficult steps of the process. This matter becomes more significant when we try to use the algorithms presented in complicated systems, such as the identity recognition systems. Different methods of image segmentation have been presented so far. In this article, a two-step algorithm has been proposed for iris segmentation. In the first step, a median filter has been applied to eliminate the noise, and in the next step, the modified active contour has been used for iris segmentation. The proposed algorithm was tested on the CASIA image data base and the obtained results showed that the proposed method has an acceptable accuracy.
图像分割是一种广泛应用于图像处理的工具,它是图像处理过程中最困难的步骤之一。当我们尝试在复杂的系统(如身份识别系统)中使用算法时,这个问题变得更加重要。目前已经提出了不同的图像分割方法。本文提出了一种两步虹膜分割算法。首先利用中值滤波去除噪声,然后利用改进后的活动轮廓进行虹膜分割。在CASIA图像数据库上对该算法进行了测试,结果表明该算法具有较好的精度。
{"title":"A novel Iris segmentation method based on balloon active contour","authors":"Seyyed Mohammad Talebi, A. Ayatollahi, S. Moosavi","doi":"10.1109/IRANIANMVIP.2010.5941165","DOIUrl":"https://doi.org/10.1109/IRANIANMVIP.2010.5941165","url":null,"abstract":"Image segmentation is a tool which is widely used in many applications related to image processing, and it comprises one of the most difficult steps of the process. This matter becomes more significant when we try to use the algorithms presented in complicated systems, such as the identity recognition systems. Different methods of image segmentation have been presented so far. In this article, a two-step algorithm has been proposed for iris segmentation. In the first step, a median filter has been applied to eliminate the noise, and in the next step, the modified active contour has been used for iris segmentation. The proposed algorithm was tested on the CASIA image data base and the obtained results showed that the proposed method has an acceptable accuracy.","PeriodicalId":350778,"journal":{"name":"2010 6th Iranian Conference on Machine Vision and Image Processing","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116991857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
A novel blind watermarking method based on distance vector of significant wavelet coefficients 一种基于显著小波系数距离向量的盲水印方法
Pub Date : 2010-10-01 DOI: 10.1109/IRANIANMVIP.2010.5941147
M. Hajizadeh, M. Helfroush, M. Dehghani
This paper proposes an efficient blind watermarking algorithm using distance vector for copyright protection. In this algorithm, the wavelet coefficients from various frequency locations have been grouped into a sequence and named as Group for invisible watermark embedding and extraction. In the next step, after choosing the maximum and second maximum amplitude coefficients of each Group, the distance vector between two coefficients is computed. For embedding bit zero and bit 1, values of the distance vector elements are decreased or increased, respectively. The proposed method, takes advantage of considerable robustness against prevalent attacks. Comparison analysis demonstrates that our method has better performance than the other watermarking schemes reported recently and also watermarked images do not suffer from obvious visual distortion.
提出了一种基于距离矢量的版权保护盲水印算法。该算法将不同频率位置的小波系数分组成一个序列,称为组,用于不可见水印的嵌入和提取。下一步,在选择每个组的最大和第二个最大振幅系数后,计算两个系数之间的距离矢量。对于嵌入位0和位1,距离矢量元素的值分别减小或增大。所提出的方法对流行的攻击具有相当强的鲁棒性。对比分析表明,该方法比目前报道的其他水印方案具有更好的性能,并且水印后的图像不会产生明显的视觉失真。
{"title":"A novel blind watermarking method based on distance vector of significant wavelet coefficients","authors":"M. Hajizadeh, M. Helfroush, M. Dehghani","doi":"10.1109/IRANIANMVIP.2010.5941147","DOIUrl":"https://doi.org/10.1109/IRANIANMVIP.2010.5941147","url":null,"abstract":"This paper proposes an efficient blind watermarking algorithm using distance vector for copyright protection. In this algorithm, the wavelet coefficients from various frequency locations have been grouped into a sequence and named as Group for invisible watermark embedding and extraction. In the next step, after choosing the maximum and second maximum amplitude coefficients of each Group, the distance vector between two coefficients is computed. For embedding bit zero and bit 1, values of the distance vector elements are decreased or increased, respectively. The proposed method, takes advantage of considerable robustness against prevalent attacks. Comparison analysis demonstrates that our method has better performance than the other watermarking schemes reported recently and also watermarked images do not suffer from obvious visual distortion.","PeriodicalId":350778,"journal":{"name":"2010 6th Iranian Conference on Machine Vision and Image Processing","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126758089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Using bivariate Gaussian distribution for image denoising in the 2-D complex wavelet domain 利用二元高斯分布进行二维复小波域图像去噪
Pub Date : 2010-10-01 DOI: 10.1109/IRANIANMVIP.2010.5941157
Ali Rekabdar, O. Khayat, Noushin Khatib, Mina Aminghafari
Within this framework we describe a novel technique for removing noise from digital noisy images, based on the modeling of wavelet coefficient with bivariate normal distribution and statistical calculation. A method for image denoising is presented in this paper to maximize a posterior density function (MAP) estimator using a bivariate normal random variable. We use our denoising algorithm in 2-D complex wavelet domain comparing with soft and hard thresholding method of stationary wavelet analysis tool (2-D SWT). Despite the simplicity of our method in its implementation, our denoising results achieves better performance than the other mentioned methods both visually and in terms of peak signal-to-noise ratio (PSNR).
在此框架内,我们描述了一种基于二元正态分布的小波系数建模和统计计算的数字噪声图像去噪新技术。提出了一种利用二元正态随机变量最大化后验密度函数(MAP)估计量的图像去噪方法。将该算法应用于二维复小波域,与平稳小波分析工具(二维SWT)的软硬阈值法进行了比较。尽管我们的方法在实现上很简单,但我们的去噪结果在视觉和峰值信噪比(PSNR)方面都比其他提到的方法取得了更好的性能。
{"title":"Using bivariate Gaussian distribution for image denoising in the 2-D complex wavelet domain","authors":"Ali Rekabdar, O. Khayat, Noushin Khatib, Mina Aminghafari","doi":"10.1109/IRANIANMVIP.2010.5941157","DOIUrl":"https://doi.org/10.1109/IRANIANMVIP.2010.5941157","url":null,"abstract":"Within this framework we describe a novel technique for removing noise from digital noisy images, based on the modeling of wavelet coefficient with bivariate normal distribution and statistical calculation. A method for image denoising is presented in this paper to maximize a posterior density function (MAP) estimator using a bivariate normal random variable. We use our denoising algorithm in 2-D complex wavelet domain comparing with soft and hard thresholding method of stationary wavelet analysis tool (2-D SWT). Despite the simplicity of our method in its implementation, our denoising results achieves better performance than the other mentioned methods both visually and in terms of peak signal-to-noise ratio (PSNR).","PeriodicalId":350778,"journal":{"name":"2010 6th Iranian Conference on Machine Vision and Image Processing","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126100730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Adaptive background model for moving objects based on PCA 基于PCA的运动目标自适应背景模型
Pub Date : 2010-10-01 DOI: 10.1109/IRANIANMVIP.2010.5941174
M. H. Ghaeminia, S. B. Shokouhi
Background modeling and detecting moving objects in scene is a convenient method in many surveillance systems. We propose an approach that is useful in estimating background. In our approach, first each frame is divided to blocks, and blocks in frame sequences sorted to make block series. Finally PCA process applied to these block series. Based on PCA theorem if there is change in block series which means there is not pure background, the main component of block series is comparable to other components of series. By detecting these regions and neglecting it from scene a background modeled. This approach was known as multi block PCA which was used before for detection changes in images and now in this paper we apply it to video sequences adaptively. In this model dimension of database equals to number of frames which made block series. Also our experiments show that this method is robust in change illumination because the model is updated periodically. Moreover computational complexity of the algorithm and accuracy in localizing moving objects could be compared with other fast clustering based background modeling such as Mixture of Gaussian (MoG) and mean shift technique.
背景建模和检测场景中的运动目标是许多监控系统的一种方便方法。我们提出了一种在估计背景时有用的方法。在我们的方法中,首先将每个帧划分为块,并将帧序列中的块排序成块序列。最后将PCA处理应用于这些块序列。根据PCA定理,如果块序列发生变化,即不存在纯背景,则块序列的主成分与序列的其他成分具有可比性。通过检测这些区域并将其从场景中忽略,建立了一个背景模型。这种方法被称为多块PCA,以前用于检测图像的变化,现在我们将其应用于视频序列的自适应检测。在该模型中,数据库的维数等于构成块序列的帧数。实验结果表明,该方法对光照变化具有较强的鲁棒性。此外,该算法的计算复杂度和定位运动目标的精度可与其他基于快速聚类的背景建模技术如混合高斯(MoG)和均值移位技术相比较。
{"title":"Adaptive background model for moving objects based on PCA","authors":"M. H. Ghaeminia, S. B. Shokouhi","doi":"10.1109/IRANIANMVIP.2010.5941174","DOIUrl":"https://doi.org/10.1109/IRANIANMVIP.2010.5941174","url":null,"abstract":"Background modeling and detecting moving objects in scene is a convenient method in many surveillance systems. We propose an approach that is useful in estimating background. In our approach, first each frame is divided to blocks, and blocks in frame sequences sorted to make block series. Finally PCA process applied to these block series. Based on PCA theorem if there is change in block series which means there is not pure background, the main component of block series is comparable to other components of series. By detecting these regions and neglecting it from scene a background modeled. This approach was known as multi block PCA which was used before for detection changes in images and now in this paper we apply it to video sequences adaptively. In this model dimension of database equals to number of frames which made block series. Also our experiments show that this method is robust in change illumination because the model is updated periodically. Moreover computational complexity of the algorithm and accuracy in localizing moving objects could be compared with other fast clustering based background modeling such as Mixture of Gaussian (MoG) and mean shift technique.","PeriodicalId":350778,"journal":{"name":"2010 6th Iranian Conference on Machine Vision and Image Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130048121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
A low power smart CMOS image sensor for surveillance applications 用于监控应用的低功耗智能CMOS图像传感器
Pub Date : 2010-10-01 DOI: 10.1109/IRANIANMVIP.2010.5941166
M. Habibi
The efficient transmission of video rate data is a demanding need in camera surveillance systems. This paper presents a low power smart CMOS image sensor which is suitable for surveillance applications. The sensor captures the image scene and using in-pixel difference detectors, it detects the temporal change events in the image. To reduce the power consumption, only the portions of the image scene with intensity change are transferred to the output. For this purpose, the performance of two different event driven data transfer methods, pixel based and window based, are investigated and it is shown that each method is appropriate under different surveillance conditions. The performance of the technique is shown using a 64×64 pixel sensor designed in a 0.18μm standard CMOS technology. The sensor chip consumes 0.5mW of power while operating at 30fps.
视频速率数据的高效传输是摄像机监控系统的一个迫切需求。本文提出了一种适合于监控应用的低功耗智能CMOS图像传感器。传感器捕获图像场景,并使用像素内差分检测器检测图像中的时间变化事件。为了减少功耗,只有图像场景中强度变化的部分被传输到输出。为此,研究了基于像素和基于窗口的两种不同的事件驱动数据传输方法的性能,并表明每种方法适用于不同的监控条件。采用0.18μm标准CMOS技术设计的64×64像素传感器显示了该技术的性能。传感器芯片在30fps工作时消耗0.5mW的功率。
{"title":"A low power smart CMOS image sensor for surveillance applications","authors":"M. Habibi","doi":"10.1109/IRANIANMVIP.2010.5941166","DOIUrl":"https://doi.org/10.1109/IRANIANMVIP.2010.5941166","url":null,"abstract":"The efficient transmission of video rate data is a demanding need in camera surveillance systems. This paper presents a low power smart CMOS image sensor which is suitable for surveillance applications. The sensor captures the image scene and using in-pixel difference detectors, it detects the temporal change events in the image. To reduce the power consumption, only the portions of the image scene with intensity change are transferred to the output. For this purpose, the performance of two different event driven data transfer methods, pixel based and window based, are investigated and it is shown that each method is appropriate under different surveillance conditions. The performance of the technique is shown using a 64×64 pixel sensor designed in a 0.18μm standard CMOS technology. The sensor chip consumes 0.5mW of power while operating at 30fps.","PeriodicalId":350778,"journal":{"name":"2010 6th Iranian Conference on Machine Vision and Image Processing","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128248399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Block-based image error concealment using fragile watermarking in error-prone channels 在易出错通道中使用脆弱水印的基于块的图像错误隐藏
Pub Date : 2010-10-01 DOI: 10.1109/IRANIANMVIP.2010.5941148
R. Keshavarzian, A. Aghagolzadeh, Hadi Seyedarabi, J. M. Niya
The transmission of block-coded images over wireless channels results in lost blocks. In this paper, we propose a new error concealment method for covering up the high packet losses of an original image after its transmission through an error-prone channel. In this scheme, Discrete Wavelet Transform (DWT) is applied to each block of the original image in order to produce a lower resolution copy of the each block. Then, we choose approximation coefficients of each block as replica of the block and embed it into a remote block of the image in the spatial domain. It is shown that the proposed scheme provides significant improvement over existing algorithms in terms of both subjective and objective evaluations. This technique can be implemented for wireless channels to combat degradations in a backward-compatible scheme.
在无线信道上传输块编码图像会导致块丢失。在本文中,我们提出了一种新的错误隐藏方法,用于掩盖原始图像通过易出错通道传输后的高丢包率。在该方案中,将离散小波变换(DWT)应用于原始图像的每个块,以产生每个块的低分辨率副本。然后,我们选择每个块的近似系数作为块的副本,并将其嵌入到空间域中图像的远程块中。结果表明,该方案在主观和客观评价方面都比现有算法有了显著的改进。这种技术可以在无线信道中实现,以向后兼容的方案来对抗降级。
{"title":"Block-based image error concealment using fragile watermarking in error-prone channels","authors":"R. Keshavarzian, A. Aghagolzadeh, Hadi Seyedarabi, J. M. Niya","doi":"10.1109/IRANIANMVIP.2010.5941148","DOIUrl":"https://doi.org/10.1109/IRANIANMVIP.2010.5941148","url":null,"abstract":"The transmission of block-coded images over wireless channels results in lost blocks. In this paper, we propose a new error concealment method for covering up the high packet losses of an original image after its transmission through an error-prone channel. In this scheme, Discrete Wavelet Transform (DWT) is applied to each block of the original image in order to produce a lower resolution copy of the each block. Then, we choose approximation coefficients of each block as replica of the block and embed it into a remote block of the image in the spatial domain. It is shown that the proposed scheme provides significant improvement over existing algorithms in terms of both subjective and objective evaluations. This technique can be implemented for wireless channels to combat degradations in a backward-compatible scheme.","PeriodicalId":350778,"journal":{"name":"2010 6th Iranian Conference on Machine Vision and Image Processing","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132666934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A perceptual based motion compensation technique for video coding 基于感知的视频编码运动补偿技术
Pub Date : 2010-10-01 DOI: 10.1109/IRANIANMVIP.2010.5941158
A. Banitalebi, S. Nader-Esfahani, A. Avanaki
Motion estimation is one of the important procedures in the all video encoders. Most of the complexity of the video coder depends on the complexity of the motion estimation step. The original motion estimation algorithm has a remarkable complexity and therefore many improvements were proposed to enhance the crude version of the motion estimation. The basic idea of many of these works were to optimize some distortion function for mean squared error (MSE) or sum of absolute difference (SAD) in block matching But it is shown that these metrics do not conclude the quality as it is, on the other hand, they are not compatible with the human visual system (HVS). In this paper we explored the usage of the image quality metrics in the video coding and more specific in the motion estimation. We have utilized the perceptual image quality metrics instead of MSE or SAD in the block based motion estimation. Three different metrics have used: structural similarity or SSIM, complex wavelet structural similarity or CW-SSIM, visual information fidelity or VIF. Experimental results showed that usage of the quality criterions can improve the compression rate while the quality remains fix and thus better quality in coded video at the same bit budget.
运动估计是所有视频编码器的重要步骤之一。视频编码器的复杂度很大程度上取决于运动估计步骤的复杂度。原始的运动估计算法非常复杂,因此提出了许多改进来改进原始的运动估计算法。这些工作的基本思想是对块匹配中的均方误差(MSE)或绝对差和(SAD)的畸变函数进行优化,但结果表明,这些指标并不能反映块匹配的质量,另一方面,它们与人类视觉系统(HVS)不兼容。本文探讨了图像质量度量在视频编码中的应用,特别是在运动估计中的应用。在基于块的运动估计中,我们使用了感知图像质量度量来代替MSE或SAD。使用了三种不同的度量:结构相似性(SSIM),复杂小波结构相似性(CW-SSIM),视觉信息保真度(VIF)。实验结果表明,使用质量准则可以在保证质量不变的情况下提高压缩率,从而在相同比特预算下获得更好的编码视频质量。
{"title":"A perceptual based motion compensation technique for video coding","authors":"A. Banitalebi, S. Nader-Esfahani, A. Avanaki","doi":"10.1109/IRANIANMVIP.2010.5941158","DOIUrl":"https://doi.org/10.1109/IRANIANMVIP.2010.5941158","url":null,"abstract":"Motion estimation is one of the important procedures in the all video encoders. Most of the complexity of the video coder depends on the complexity of the motion estimation step. The original motion estimation algorithm has a remarkable complexity and therefore many improvements were proposed to enhance the crude version of the motion estimation. The basic idea of many of these works were to optimize some distortion function for mean squared error (MSE) or sum of absolute difference (SAD) in block matching But it is shown that these metrics do not conclude the quality as it is, on the other hand, they are not compatible with the human visual system (HVS). In this paper we explored the usage of the image quality metrics in the video coding and more specific in the motion estimation. We have utilized the perceptual image quality metrics instead of MSE or SAD in the block based motion estimation. Three different metrics have used: structural similarity or SSIM, complex wavelet structural similarity or CW-SSIM, visual information fidelity or VIF. Experimental results showed that usage of the quality criterions can improve the compression rate while the quality remains fix and thus better quality in coded video at the same bit budget.","PeriodicalId":350778,"journal":{"name":"2010 6th Iranian Conference on Machine Vision and Image Processing","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115491299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
A new cumulant-based active contour model with wavelet energy for segmentation of SAR images 一种新的基于小波能量累积的SAR图像主动轮廓分割模型
Pub Date : 2010-10-01 DOI: 10.1109/IRANIANMVIP.2010.5941131
G. Akbarizadeh, G. Rezai-Rad
In this paper, a new algorithm for segmentation of Synthetic Aperture Radar images using the skewness wavelet energy has been presented. The skewness is the 3rd order cumulant which extracts the statistical properties of each region of a SAR image. SAR images have Nonlinearity in intensity inhomogeneities because of the speckle noise. The algorithm which we proposed in this paper is a region-based active contour model that is able to use the intensity information in local regions. This algorithm also is able to cope with the speckle noise and nonlinear intensity inhomogeneity of SAR images. We use the wavelet energy to analyze each sub-band of a SAR image. The results of the proposed algorithm on the test SAR images of agricultural and urban regions show a good performance of this method.
提出了一种利用偏度小波能量对合成孔径雷达图像进行分割的新算法。偏度是提取SAR图像各区域统计特性的三阶累积量。由于散斑噪声的存在,SAR图像的强度不均匀性存在非线性。本文提出的算法是一种基于区域的活动轮廓模型,能够利用局部区域的强度信息。该算法还能处理SAR图像的散斑噪声和非线性强度不均匀性。我们利用小波能量对SAR图像的每个子带进行分析。在农业和城市区域的SAR测试图像上,该算法取得了良好的效果。
{"title":"A new cumulant-based active contour model with wavelet energy for segmentation of SAR images","authors":"G. Akbarizadeh, G. Rezai-Rad","doi":"10.1109/IRANIANMVIP.2010.5941131","DOIUrl":"https://doi.org/10.1109/IRANIANMVIP.2010.5941131","url":null,"abstract":"In this paper, a new algorithm for segmentation of Synthetic Aperture Radar images using the skewness wavelet energy has been presented. The skewness is the 3rd order cumulant which extracts the statistical properties of each region of a SAR image. SAR images have Nonlinearity in intensity inhomogeneities because of the speckle noise. The algorithm which we proposed in this paper is a region-based active contour model that is able to use the intensity information in local regions. This algorithm also is able to cope with the speckle noise and nonlinear intensity inhomogeneity of SAR images. We use the wavelet energy to analyze each sub-band of a SAR image. The results of the proposed algorithm on the test SAR images of agricultural and urban regions show a good performance of this method.","PeriodicalId":350778,"journal":{"name":"2010 6th Iranian Conference on Machine Vision and Image Processing","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114420843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
A new retinal image processing method for human identification using radon transform 基于radon变换的人脸识别视网膜图像处理新方法
Pub Date : 2010-10-01 DOI: 10.1109/IRANIANMVIP.2010.5941139
A. Zahedi, H. Sadjedi, A. Behrad
The blood vessels of retinal image have a unique pattern, from eye to eye and person to person. We have used this trait for designed a new person identification system. This approach focused on blood vessels around the optical disc instead of extracting total retinal blood to optimize the computational cost. At first, optical disc is localized using template matching technique and uses it to rotate the retinal image to reference position. This process compensate the rotation effects which might occur during scanning process then a circular region of interest (ROI) around optical disc is selected. Next, a rotation invariant template is created from each ROI by a polar transformation. In the next stage, vessels from each template are enhanced. Radon transform is used for feature definition in our method. Finally we employ 1D discrete Fourier transform and Euclidian distance for feature matching. The proposed algorithm was tested on a 200 image from DRIVE database [9]. Experimental results on the database demonstrated an average identification rate equal to 100 percent for our identification system.
视网膜图像的血管具有独特的模式,从眼到眼,从人到人。我们利用这一特性设计了一种新的人物识别系统。该方法将重点放在光盘周围的血管上,而不是提取视网膜的全部血液,以优化计算成本。首先,利用模板匹配技术对光盘进行定位,并利用模板匹配技术将视网膜图像旋转到参考位置;该方法补偿了扫描过程中可能产生的旋转效应,选择了光盘周围的圆形感兴趣区域。接下来,通过极坐标变换从每个ROI创建一个旋转不变模板。在下一阶段,每个模板中的血管都得到增强。在我们的方法中,Radon变换用于特征定义。最后采用一维离散傅里叶变换和欧氏距离进行特征匹配。在DRIVE数据库的一张200张图像上对该算法进行了测试[9]。在数据库上的实验结果表明,我们的识别系统的平均识别率等于100%。
{"title":"A new retinal image processing method for human identification using radon transform","authors":"A. Zahedi, H. Sadjedi, A. Behrad","doi":"10.1109/IRANIANMVIP.2010.5941139","DOIUrl":"https://doi.org/10.1109/IRANIANMVIP.2010.5941139","url":null,"abstract":"The blood vessels of retinal image have a unique pattern, from eye to eye and person to person. We have used this trait for designed a new person identification system. This approach focused on blood vessels around the optical disc instead of extracting total retinal blood to optimize the computational cost. At first, optical disc is localized using template matching technique and uses it to rotate the retinal image to reference position. This process compensate the rotation effects which might occur during scanning process then a circular region of interest (ROI) around optical disc is selected. Next, a rotation invariant template is created from each ROI by a polar transformation. In the next stage, vessels from each template are enhanced. Radon transform is used for feature definition in our method. Finally we employ 1D discrete Fourier transform and Euclidian distance for feature matching. The proposed algorithm was tested on a 200 image from DRIVE database [9]. Experimental results on the database demonstrated an average identification rate equal to 100 percent for our identification system.","PeriodicalId":350778,"journal":{"name":"2010 6th Iranian Conference on Machine Vision and Image Processing","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121159294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
期刊
2010 6th Iranian Conference on Machine Vision and Image Processing
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1