使用 FPGA 在糖尿病视网膜病变 (DR) 图像上实现图像增强和边缘检测算法

Mumtahina Orthy, Sheikh Md. Rabiul Islam, Faijah Rashid, M. Hasan
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摘要

糖尿病视网膜病变(DR)是一种眼部疾病,可能会导致糖尿病患者丧失视力并最终失明。视网膜是位于眼球后部的一层感光组织,其血管会受到不利影响。DR 的识别需要利用视网膜眼底图像。通过原始眼底图像检测眼部任何形式的异常都是对医疗从业人员的巨大挑战。因此,对眼底图像进行处理势在必行。本文阐述了 DR 图像的几种图像处理技术,包括但不限于亮度级别处理、负变换应用和阈值操作的利用。本文重点阐述了与 DR 图像有关的增强技术,这些技术旨在优化上述图像的视觉质量,以便更方便地检测疾病。在 DR 图像中检测边缘的过程也是通过 Sobel 边缘检测算法来执行的。为了成功地执行上述算法,需要使用先进的系统来处理复杂的图像处理计算。为了满足高级算法的先决条件,专门使用软件技术是一个巨大的挑战,因为这些算法的计算过程多种多样,而且对处理速度有极高的要求。我们利用所提出的模型,为设计和执行基于现场可编程门阵列(FPGA)的图像增强过程以及 DR 图像上的 Sobel 边缘检测算法建立了一个熟练的模型。最后,还开发了一种互联网协议芯片,可将多种图像增强操作合并到一个框架中,且复杂度较低。
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Implementation of Image Enhancement and Edge Detection Algorithm on Diabetic Retinopathy (DR) Image Using FPGA
Diabetic retinopathy (DR) is an ocular ailment that may lead to loss of vision and eventual blindness among individuals diagnosed with diabetes. The blood vessels of the retina, a layer of light-sensitive tissue located at the posterior aspect of the ocular globe, are adversely impacted. The identification of DR entails the utilization of retinal fundus images. The detection of any form of abnormality in the eye through raw fundus images poses a significant challenge for medical practitioners. Hence, it is imperative to engage in the processing of fundus images. This paper delineates several image processing techniques for DR images, including but not limited to, manipulation of brightness levels, application of negative transformation, and utilization of threshold operations. It focuses on elucidating the enhancement techniques that pertain to DR images, which aim to optimize the visual quality of said images in order to facilitate more facile disease detection. The process of detecting edges within DR images is also executed by Sobel edge detection algorithm. In order to successfully execute the aforementioned algorithms, expedient and contemporaneous systems are favored to account for the intricacies of the image processing calculations. The exclusive utilization of software techniques in order to fulfill the prerequisites of advanced algorithms presents a significant challenge, owing to the multifarious processes that are involved in their computation, coupled with an exigent requirement for high processing speeds. The proposed model is utilized to articulate a proficient model for the design and execution of field programable gate array (FPGA)-based image enhancement processes along with the Sobel edge detection algorithm upon DR images. Finally, a Internet Protocol chip is developed that can combine multiple image enhancement operations into a single framework with less complexity.
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