It has been suggested that there may be an imbalance of excitation and inhibitory processes in the visual areas of the brain in people with migraine aura (MA). One idea is thalamocortical dysrhythmia, characterized by disordered oscillations, and thus disordered communication between the lateral geniculate nucleus and the cortex. Cross-orientation suppression is a visual task thought to rely on inhibitory processing, possibly originating in the lateral geniculate nucleus. We measured both resting-state oscillations and cross-orientation suppression using EEG over occipital areas in people with MA and healthy volunteers. We found evidence of cross-orientation suppression in the SSVEP responses, but no evidence of any group difference. Therefore, inhibitory processes related to cross-orientation suppression do not appear to be impaired in MA.
{"title":"No Evidence of Cross-Orientation Suppression Differences in Migraine with Aura Compared to Healthy Controls","authors":"Louise O’Hare, Choi Lam Wan","doi":"10.3390/vision8010002","DOIUrl":"https://doi.org/10.3390/vision8010002","url":null,"abstract":"It has been suggested that there may be an imbalance of excitation and inhibitory processes in the visual areas of the brain in people with migraine aura (MA). One idea is thalamocortical dysrhythmia, characterized by disordered oscillations, and thus disordered communication between the lateral geniculate nucleus and the cortex. Cross-orientation suppression is a visual task thought to rely on inhibitory processing, possibly originating in the lateral geniculate nucleus. We measured both resting-state oscillations and cross-orientation suppression using EEG over occipital areas in people with MA and healthy volunteers. We found evidence of cross-orientation suppression in the SSVEP responses, but no evidence of any group difference. Therefore, inhibitory processes related to cross-orientation suppression do not appear to be impaired in MA.","PeriodicalId":23649,"journal":{"name":"Vision","volume":"94 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139612413","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}
N. Erdinest, Maya Atar-Vardi, Naomi London, David Landau, David Smadja, E. Pras, Itay Lavy, Y. Morad
This retrospective study evaluates the effectiveness of combining 0.05% atropine with MF60 contact lenses in managing rapid myopia progression in children over one year. The study involved three groups: the treatment group (TG) with 15 children (53% male, average age 12.9 ± 1.04), the MF group (MF) with 12 children (50% male, average age 12.8 ± 0.8) using only MF60 lenses, and the control group (CG) with 14 children (43% male, average age 12.1 ± 0.76). Baseline myopia and axial length (AL) were similar across groups, with the TG, MF, and CG showing −4.02 ± 0.70 D, −4.18 ± 0.89 D, −3.86 ± 0.99 D, and 24.72 ± 0.73 mm, 24.98 ± 0.70 mm, 24.59 ± 1.02 mm, respectively. Prior to the study, all groups exhibited significant myopia and AL progression, with no previous myopia control management. The treatment involved daily 0.05% atropine instillation, the use of MF60 lenses and increased outdoor activity. Biannual cycloplegic refraction and slit lamp evaluations confirmed no adverse reactions. After one year, the TG showed a significant reduction in myopia and AL progression (−0.43 ± 0.46 D, p < 0.01; 0.22 ± 0.23 mm, p < 0.01), whereas the CG showed minimal change (−1.30 ± 0.43 D, p = 0.36; 0.65 ± 0.35 mm, p = 0.533). The MF group also exhibited a notable decrease (−0.74 ± 0.45 D, p < 0.01; 0.36 ± 0.23 mm). Increased outdoor activity during the treatment year did not significantly impact myopia control, suggesting its limited additional effect in this cohort. The study concludes that the combination of 0.05% atropine and peripheral defocus soft contact lenses effectively controls myopia progression in children.
{"title":"Treatment of Rapid Progression of Myopia: Topical Atropine 0.05% and MF60 Contact Lenses","authors":"N. Erdinest, Maya Atar-Vardi, Naomi London, David Landau, David Smadja, E. Pras, Itay Lavy, Y. Morad","doi":"10.3390/vision8010003","DOIUrl":"https://doi.org/10.3390/vision8010003","url":null,"abstract":"This retrospective study evaluates the effectiveness of combining 0.05% atropine with MF60 contact lenses in managing rapid myopia progression in children over one year. The study involved three groups: the treatment group (TG) with 15 children (53% male, average age 12.9 ± 1.04), the MF group (MF) with 12 children (50% male, average age 12.8 ± 0.8) using only MF60 lenses, and the control group (CG) with 14 children (43% male, average age 12.1 ± 0.76). Baseline myopia and axial length (AL) were similar across groups, with the TG, MF, and CG showing −4.02 ± 0.70 D, −4.18 ± 0.89 D, −3.86 ± 0.99 D, and 24.72 ± 0.73 mm, 24.98 ± 0.70 mm, 24.59 ± 1.02 mm, respectively. Prior to the study, all groups exhibited significant myopia and AL progression, with no previous myopia control management. The treatment involved daily 0.05% atropine instillation, the use of MF60 lenses and increased outdoor activity. Biannual cycloplegic refraction and slit lamp evaluations confirmed no adverse reactions. After one year, the TG showed a significant reduction in myopia and AL progression (−0.43 ± 0.46 D, p < 0.01; 0.22 ± 0.23 mm, p < 0.01), whereas the CG showed minimal change (−1.30 ± 0.43 D, p = 0.36; 0.65 ± 0.35 mm, p = 0.533). The MF group also exhibited a notable decrease (−0.74 ± 0.45 D, p < 0.01; 0.36 ± 0.23 mm). Increased outdoor activity during the treatment year did not significantly impact myopia control, suggesting its limited additional effect in this cohort. The study concludes that the combination of 0.05% atropine and peripheral defocus soft contact lenses effectively controls myopia progression in children.","PeriodicalId":23649,"journal":{"name":"Vision","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139524998","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}
Faces and words are ever-present stimuli in social environments that require fine-grained, efficient discrimination of their constituents in order to acquire meaning. Provided that these stimuli share multiple characteristics, while simultaneously being different visual object categories in important ways, a debate has ensued pertaining to whether their processing can be reduced to a common mechanism or whether each category mobilizes exclusive resources. We thus first present briefly domain-specific and domain-general accounts, as opposing perspectives that highlight the absence and presence of commonalities in face and word processing, respectively. We then focus on how faces and words are processed. While faces are usually associated with holistic processing of facial features, to create a perceptual whole, there is no such consensus pertaining to word processing. Words have been argued to rely on either letter-by-letter processing or in a way closer to that of faces, since they are also objects of expertise. Lastly, we advance the debate by providing an overview of our latest research findings. These findings provide a more direct comparison of face and word processing, by incorporating both stimuli in one task concurrently.
{"title":"Domain Specificity vs. Domain Generality: The Case of Faces and Words","authors":"Paulo Ventura, Francisco Cruz","doi":"10.3390/vision8010001","DOIUrl":"https://doi.org/10.3390/vision8010001","url":null,"abstract":"Faces and words are ever-present stimuli in social environments that require fine-grained, efficient discrimination of their constituents in order to acquire meaning. Provided that these stimuli share multiple characteristics, while simultaneously being different visual object categories in important ways, a debate has ensued pertaining to whether their processing can be reduced to a common mechanism or whether each category mobilizes exclusive resources. We thus first present briefly domain-specific and domain-general accounts, as opposing perspectives that highlight the absence and presence of commonalities in face and word processing, respectively. We then focus on how faces and words are processed. While faces are usually associated with holistic processing of facial features, to create a perceptual whole, there is no such consensus pertaining to word processing. Words have been argued to rely on either letter-by-letter processing or in a way closer to that of faces, since they are also objects of expertise. Lastly, we advance the debate by providing an overview of our latest research findings. These findings provide a more direct comparison of face and word processing, by incorporating both stimuli in one task concurrently.","PeriodicalId":23649,"journal":{"name":"Vision","volume":"8 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138948569","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}
Maria Letizia Salvetat, Francesco Pellegrini, Leopoldo Spadea, Carlo Salati, Marco Zeppieri
Non-arteritic anterior ischemic optic neuropathy (NA-AION) represents one of the most important causes of blindness or severely impaired vision in middle-aged and elderly people. Unilateral optic disc edema and abrupt, painless vision loss are its defining features. It is commonly assumed that NA-AION is caused by an ischemic infarction of the optic nerve head, and, although the exact pathogenesis is still unknown, several risk factors and comorbidities associated with its development have been found. NA-AION occurs generally in patients older than 50 years who have small optic discs and vasculopathy risk factors. Even though numerous treatment options have been proposed, no available effective medical or surgical therapy or prophylactic measure for NA-AION currently exists. The purpose of present-day therapeutic strategies is therefore to identify and possibly control any underlying modifiable risk factors, aiming to prevent the development of new NA-AION episodes in the affected and fellow eye. A thorough assessment of NAION, including its history, epidemiology, etiology, pathophysiology, risk factors, associated comorbidities, clinical findings, diagnostic tests, treatment choices, prognosis, and future research, is the goal of this work.
{"title":"Non-Arteritic Anterior Ischemic Optic Neuropathy (NA-AION): A Comprehensive Overview","authors":"Maria Letizia Salvetat, Francesco Pellegrini, Leopoldo Spadea, Carlo Salati, Marco Zeppieri","doi":"10.3390/vision7040072","DOIUrl":"https://doi.org/10.3390/vision7040072","url":null,"abstract":"Non-arteritic anterior ischemic optic neuropathy (NA-AION) represents one of the most important causes of blindness or severely impaired vision in middle-aged and elderly people. Unilateral optic disc edema and abrupt, painless vision loss are its defining features. It is commonly assumed that NA-AION is caused by an ischemic infarction of the optic nerve head, and, although the exact pathogenesis is still unknown, several risk factors and comorbidities associated with its development have been found. NA-AION occurs generally in patients older than 50 years who have small optic discs and vasculopathy risk factors. Even though numerous treatment options have been proposed, no available effective medical or surgical therapy or prophylactic measure for NA-AION currently exists. The purpose of present-day therapeutic strategies is therefore to identify and possibly control any underlying modifiable risk factors, aiming to prevent the development of new NA-AION episodes in the affected and fellow eye. A thorough assessment of NAION, including its history, epidemiology, etiology, pathophysiology, risk factors, associated comorbidities, clinical findings, diagnostic tests, treatment choices, prognosis, and future research, is the goal of this work.","PeriodicalId":23649,"journal":{"name":"Vision","volume":" 20","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135241449","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}
Olivia Hillan, Lee Smith, Simon Bishop, Peter M. Allen
Physical inactivity is a prevalent concern amongst adults living with sight loss. It is essential to understand why these individuals are inactive and how we can increase physical activity levels among them. Therefore, this study aims to explore the barriers and facilitators to physical activity for individuals living with sight loss. Seven individuals with self-reported sight loss living in Cambridgeshire were recruited for three focus groups. Focus group data were analysed using thematic analysis to identify key themes. Seven themes which represented a barrier, or a facilitator were identified: transport, accessing information, one size fits all, negative previous experience, visually impaired sport, women in disability sport, and taster days. To increase physical activity levels amongst those living with sight loss, interventions need to be focused on the organisational level. This includes producing more accessible environments that can be produced by providing training for sport and physical activity professionals and by ensuring the physical environment is inclusive for those living with sight loss.
{"title":"Barriers to and Facilitators of Physical Activity: A Qualitative Study from the Perspective of Individuals Living with Sight Loss in Cambridgeshire","authors":"Olivia Hillan, Lee Smith, Simon Bishop, Peter M. Allen","doi":"10.3390/vision7040070","DOIUrl":"https://doi.org/10.3390/vision7040070","url":null,"abstract":"Physical inactivity is a prevalent concern amongst adults living with sight loss. It is essential to understand why these individuals are inactive and how we can increase physical activity levels among them. Therefore, this study aims to explore the barriers and facilitators to physical activity for individuals living with sight loss. Seven individuals with self-reported sight loss living in Cambridgeshire were recruited for three focus groups. Focus group data were analysed using thematic analysis to identify key themes. Seven themes which represented a barrier, or a facilitator were identified: transport, accessing information, one size fits all, negative previous experience, visually impaired sport, women in disability sport, and taster days. To increase physical activity levels amongst those living with sight loss, interventions need to be focused on the organisational level. This includes producing more accessible environments that can be produced by providing training for sport and physical activity professionals and by ensuring the physical environment is inclusive for those living with sight loss.","PeriodicalId":23649,"journal":{"name":"Vision","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135973734","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}
We aimed to describe a variation of the surgical technique for the ab interno implantation of the XEN Gel Stent, which, in our experience, is yielding very successful results. The injection of 0.1 mL of air and then of 0.1 mL of a dispersive viscoelastic into the subconjunctival space at the beginning of the surgery allows one to perform a mechanical dissection between the conjunctiva and the Tenon’s capsule, creating a real space. In total, 20 eyes of 16 patients underwent the implantation of a stent gel through the “Air and Visco” technique. We retrospectively analyzed the results. We obtained a reduction in the IOP from an average of 18.3 ± 2.2 mmHg preoperatively to at 13.5 ± 3.5 mmHg at month 12. The needling rate was 20%. We did not register any cases of hypotony (IOP < 6 mmHg), hypotony maculopathy or choroidal detachment. The “Air and Visco” technique allows one to correctly place the device in the subconjunctival space, which the pneumo- and visco-dissection transforms into a real space. This enables an easier surgical performance and more predictable postoperative results, with a low needling rate and reintervention in the follow-up period. It also ensures a greater safety profile because the presence of the OVD on the bleb prevents a sudden lowering of the IOP, eliminating complications such as hypotony, hypotony maculopathy and choroidal detachment in our cohort.
{"title":"“Air and Visco” Technique: A Promising Innovation in the Surgical Implantation of the Xen Gel Stent Device","authors":"Fabrizio Franco, Federica Serino, Fabrizio Giansanti","doi":"10.3390/vision7040071","DOIUrl":"https://doi.org/10.3390/vision7040071","url":null,"abstract":"We aimed to describe a variation of the surgical technique for the ab interno implantation of the XEN Gel Stent, which, in our experience, is yielding very successful results. The injection of 0.1 mL of air and then of 0.1 mL of a dispersive viscoelastic into the subconjunctival space at the beginning of the surgery allows one to perform a mechanical dissection between the conjunctiva and the Tenon’s capsule, creating a real space. In total, 20 eyes of 16 patients underwent the implantation of a stent gel through the “Air and Visco” technique. We retrospectively analyzed the results. We obtained a reduction in the IOP from an average of 18.3 ± 2.2 mmHg preoperatively to at 13.5 ± 3.5 mmHg at month 12. The needling rate was 20%. We did not register any cases of hypotony (IOP < 6 mmHg), hypotony maculopathy or choroidal detachment. The “Air and Visco” technique allows one to correctly place the device in the subconjunctival space, which the pneumo- and visco-dissection transforms into a real space. This enables an easier surgical performance and more predictable postoperative results, with a low needling rate and reintervention in the follow-up period. It also ensures a greater safety profile because the presence of the OVD on the bleb prevents a sudden lowering of the IOP, eliminating complications such as hypotony, hypotony maculopathy and choroidal detachment in our cohort.","PeriodicalId":23649,"journal":{"name":"Vision","volume":"1 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135973944","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}
Sachin Kalarn, Clare DeLaurentis, Zaid Bilgrami, Ryan Thompson, Osamah Saeedi, Janet Alexander, Mary Louise Collins, Allison Jensen, Le Tran Notarfrancesco, Moran Levin
To determine the rate of parental stress within a pediatric ophthalmology population, parents in an urban or suburban community pediatric ophthalmology clinic were administered the Parental Stress Index Short Form survey. Demographic information and parental depression or anxiety data were collected and analyzed using an independent sample t-test and chi-squared analysis. Stress measures were recorded as percentiles. One hundred and twenty-one surveys revealed the following mean percentiles: Total Stress, 45.9 ± 22.4; Parental Distress (PD), 49.7 ± 19.8; and Parent Child Dysfunctional Interaction (P-CDI), 45.1 ± 23.6. The PD percentiles of the non-married parents, those with positive parental depression or anxiety scores, and those with a high school diploma or less were 55.9 ± 18.5 versus 45.2 ± 19.6, p < 0.01; 55.2 ± 18.6 versus 46.7 ± 19.9, p < 0.05; and 56.8 ± 18.2 versus 47.0 ± 19.8, p < 0.01, respectively. The parents with a high school diploma or less in a suburban environment demonstrated higher PD/P-CDI scores versus those of an urban population. Those with median household incomes (MHI) below USD 60,000 in both the total and suburban populations showed higher PD scores. There is no significant difference in parental stress between the pediatric ophthalmology patients and the general population. The parents who are unmarried, depressed, have a high school degree or less, or an MHI below USD 60,000 experience significantly higher stress levels.
为了确定儿童眼科人群中父母压力的比率，对城市或郊区社区儿童眼科诊所的父母进行了父母压力指数短表调查。收集人口统计信息和父母抑郁或焦虑数据，并使用独立样本t检验和卡方分析进行分析。压力测量以百分位数记录。121项调查显示的平均百分位数如下:总压力，45.9±22.4;父母焦虑(PD)， 49.7±19.8;亲子功能障碍互动(P-CDI)， 45.1±23.6。未婚父母、父母抑郁或焦虑得分为阳性、高中及以下学历者的PD百分位数分别为55.9±18.5比45.2±19.6,p <0.01;55.2±18.6 vs 46.7±19.9,p <0.05;56.8±18.2 vs 47.0±19.8,p <0.01,分别。与城市人口相比，郊区环境中拥有高中或更低学历的父母表现出更高的PD/P-CDI得分。在总人口和郊区人口中，家庭收入中位数(MHI)低于6万美元的人PD得分较高。儿童眼科患者与普通人群在父母压力方面无显著差异。未婚、抑郁、高中以下学历或MHI低于6万美元的父母压力水平明显更高。
{"title":"Parental Stress in a Pediatric Ophthalmology Population","authors":"Sachin Kalarn, Clare DeLaurentis, Zaid Bilgrami, Ryan Thompson, Osamah Saeedi, Janet Alexander, Mary Louise Collins, Allison Jensen, Le Tran Notarfrancesco, Moran Levin","doi":"10.3390/vision7040069","DOIUrl":"https://doi.org/10.3390/vision7040069","url":null,"abstract":"To determine the rate of parental stress within a pediatric ophthalmology population, parents in an urban or suburban community pediatric ophthalmology clinic were administered the Parental Stress Index Short Form survey. Demographic information and parental depression or anxiety data were collected and analyzed using an independent sample t-test and chi-squared analysis. Stress measures were recorded as percentiles. One hundred and twenty-one surveys revealed the following mean percentiles: Total Stress, 45.9 ± 22.4; Parental Distress (PD), 49.7 ± 19.8; and Parent Child Dysfunctional Interaction (P-CDI), 45.1 ± 23.6. The PD percentiles of the non-married parents, those with positive parental depression or anxiety scores, and those with a high school diploma or less were 55.9 ± 18.5 versus 45.2 ± 19.6, p < 0.01; 55.2 ± 18.6 versus 46.7 ± 19.9, p < 0.05; and 56.8 ± 18.2 versus 47.0 ± 19.8, p < 0.01, respectively. The parents with a high school diploma or less in a suburban environment demonstrated higher PD/P-CDI scores versus those of an urban population. Those with median household incomes (MHI) below USD 60,000 in both the total and suburban populations showed higher PD scores. There is no significant difference in parental stress between the pediatric ophthalmology patients and the general population. The parents who are unmarried, depressed, have a high school degree or less, or an MHI below USD 60,000 experience significantly higher stress levels.","PeriodicalId":23649,"journal":{"name":"Vision","volume":"31 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136382010","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}
Pub Date : 2022-05-20DOI: 10.1109/cvidliccea56201.2022.9824691
Lisha Chen, Jiawei Liu
Aiming at the problems of fuzzy feature extraction and poor definition of large-scale landscape trees, a large-scale landscape tree feature extraction method based on airborne laser data is proposed. We use airborne laser data to obtain landscape tree images through image acquisition equipment, collect landscape tree spatial structure feature data, and classify landscape tree spatial structure feature categories. In this paper, a new landscape tree feature model is obtained through airborne laser data technology, so that all landscape tree feature points are independent of each other, so as to quickly achieve the goal of feature extraction. Finally, the large-scale landscape tree feature extraction method based on airborne laser data has significantly higher accuracy and recognition efficiency in practical application, which fully meets the research requirements.
{"title":"Feature extraction method of large-scale landscape tree based on airborne laser data","authors":"Lisha Chen, Jiawei Liu","doi":"10.1109/cvidliccea56201.2022.9824691","DOIUrl":"https://doi.org/10.1109/cvidliccea56201.2022.9824691","url":null,"abstract":"Aiming at the problems of fuzzy feature extraction and poor definition of large-scale landscape trees, a large-scale landscape tree feature extraction method based on airborne laser data is proposed. We use airborne laser data to obtain landscape tree images through image acquisition equipment, collect landscape tree spatial structure feature data, and classify landscape tree spatial structure feature categories. In this paper, a new landscape tree feature model is obtained through airborne laser data technology, so that all landscape tree feature points are independent of each other, so as to quickly achieve the goal of feature extraction. Finally, the large-scale landscape tree feature extraction method based on airborne laser data has significantly higher accuracy and recognition efficiency in practical application, which fully meets the research requirements.","PeriodicalId":23649,"journal":{"name":"Vision","volume":"169 1","pages":"1124-1127"},"PeriodicalIF":0.0,"publicationDate":"2022-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73448040","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}
Pub Date : 2022-05-20DOI: 10.1109/cvidliccea56201.2022.9824310
Lina Li, Peng Lian, Tingting Zhang, Nianfeng Li
With the development of the Internet of Things and 5G technology, stream processing systems are more and more widely used, especially the open source Storm platform. A comprehensive understanding of the research status and progress of Storm is of a certain reference value for the academic and industry to carry out related work. Based on bibliometrics theory, this paper takes the citation index of CNKI (China national knowledge infrastructure) and WOS (web of science) databases from 2013 to 2021 as the data source, and the relevant literature of Storm research and application as the research object, which is visualized and analyzed by the CiteSpace software. The knowledge maps are drawn from the aspects of temporal and spatial distribution of literature, distribution of authors and institutions, keyword co-occurrence, citation frequency and keyword prominence, and the research status, research basis, research hotspots and research trends of Storm at home and abroad are analyzed. The research results can provide references for the follow-up theoretical and application research of Storm system.
随着物联网和5G技术的发展，流处理系统的应用越来越广泛，尤其是开源的Storm平台。全面了解Storm的研究现状和进展，对学术界和业界开展相关工作具有一定的参考价值。本文基于文献计量学理论，以2013 - 2021年中国国家知识基础设施(CNKI)和WOS (web of science)数据库的引文索引为数据源，以Storm研究和应用的相关文献为研究对象，通过CiteSpace软件进行可视化分析。从文献时空分布、作者和机构分布、关键词共现、被引频次和关键词突出度等方面绘制知识图谱，分析国内外Storm的研究现状、研究基础、研究热点和研究趋势。研究结果可为后续Storm系统的理论和应用研究提供参考。
{"title":"Research Analysis of Stream Processing System Storm Based on Knowledge Map","authors":"Lina Li, Peng Lian, Tingting Zhang, Nianfeng Li","doi":"10.1109/cvidliccea56201.2022.9824310","DOIUrl":"https://doi.org/10.1109/cvidliccea56201.2022.9824310","url":null,"abstract":"With the development of the Internet of Things and 5G technology, stream processing systems are more and more widely used, especially the open source Storm platform. A comprehensive understanding of the research status and progress of Storm is of a certain reference value for the academic and industry to carry out related work. Based on bibliometrics theory, this paper takes the citation index of CNKI (China national knowledge infrastructure) and WOS (web of science) databases from 2013 to 2021 as the data source, and the relevant literature of Storm research and application as the research object, which is visualized and analyzed by the CiteSpace software. The knowledge maps are drawn from the aspects of temporal and spatial distribution of literature, distribution of authors and institutions, keyword co-occurrence, citation frequency and keyword prominence, and the research status, research basis, research hotspots and research trends of Storm at home and abroad are analyzed. The research results can provide references for the follow-up theoretical and application research of Storm system.","PeriodicalId":23649,"journal":{"name":"Vision","volume":"70 1","pages":"184-188"},"PeriodicalIF":0.0,"publicationDate":"2022-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75143145","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}
Pub Date : 2022-05-20DOI: 10.1109/cvidliccea56201.2022.9825268
Yajing Sun, Aixian Chen
A necessary part of deep learning is the adjustment of hyperparameters, which is also one of the most expensive parts of deep learning. The current mainstream adaptive learning rate algorithms include AdaGrad, RMSProp, Adam, and AdamW. AdaGrad can adapt to different learning rates for different parameters. However, its adaptive learning rate is monotonically reduced, which will lead to a weak ability to update parameters in the later stage. Although RMSProp, Adam, and AdamW solved the problem of gradually decreasing the adaptive learning rate of AdaGrad, they all introduced a hyperparameter—the momentum coefficient. In this paper, a new optimization algorithm SAdam is proposed. SAdam uses the stratified sampling technique to combine the windows with fixed first-order and second-order gradient information, which not only solves the problem that the adaptive learning rate of AdaGrad is constantly decreasing but also does not introduce additional hyperparameters. Moreover, experiments show that the test accuracy of SAdam is no less than Adam.
{"title":"An Adaptive Gradient Descent Optimization Algorithm Based on Stratified Sampling","authors":"Yajing Sun, Aixian Chen","doi":"10.1109/cvidliccea56201.2022.9825268","DOIUrl":"https://doi.org/10.1109/cvidliccea56201.2022.9825268","url":null,"abstract":"A necessary part of deep learning is the adjustment of hyperparameters, which is also one of the most expensive parts of deep learning. The current mainstream adaptive learning rate algorithms include AdaGrad, RMSProp, Adam, and AdamW. AdaGrad can adapt to different learning rates for different parameters. However, its adaptive learning rate is monotonically reduced, which will lead to a weak ability to update parameters in the later stage. Although RMSProp, Adam, and AdamW solved the problem of gradually decreasing the adaptive learning rate of AdaGrad, they all introduced a hyperparameter—the momentum coefficient. In this paper, a new optimization algorithm SAdam is proposed. SAdam uses the stratified sampling technique to combine the windows with fixed first-order and second-order gradient information, which not only solves the problem that the adaptive learning rate of AdaGrad is constantly decreasing but also does not introduce additional hyperparameters. Moreover, experiments show that the test accuracy of SAdam is no less than Adam.","PeriodicalId":23649,"journal":{"name":"Vision","volume":"30 1","pages":"1225-1231"},"PeriodicalIF":0.0,"publicationDate":"2022-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75266997","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}
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