Due to the increasing number ot diabetic patients, the number of people affected by diabetic retinopathy isexpected to increase. Diabetic retinopathy is a complication of diabetes and the most serious frequent eye dis...Due to the increasing number ot diabetic patients, the number of people affected by diabetic retinopathy isexpected to increase. Diabetic retinopathy is a complication of diabetes and the most serious frequent eye disease in the world. Large-scale retinal screening for diabetic patients is necessary to prevent visual loss and blindness. The analysis of digital retinal images, obtained by the fundus camera, is viewed as a feasible approach because retinal blood vessels have been shown to change in diameter, branching angles, or tortuosity as a result of diabetic retinopathy. The morphological change can help identify the different stages of diabetic retinopathy. In addition, the acquisition of retinal image is nonintrusive and low cost. Automatic segmentation of the retinal blood vessel is a prerequisite for this analysis.~3 This article presents a method to detect blood vessel based on sobel operators.4 Small and fast computation is the outstanding merit of this method.展开更多
介绍了基于可编程片上系统(system on programmable chip,SOPC)技术的图像处理系统的软硬件设计,创建了CMOS图像传感器控制器IP核和VGA显示控制器IP核,实现了图像的采集和显示,并由Nios II软核实现了基于Sobel算子的图像边缘检测算法。...介绍了基于可编程片上系统(system on programmable chip,SOPC)技术的图像处理系统的软硬件设计,创建了CMOS图像传感器控制器IP核和VGA显示控制器IP核,实现了图像的采集和显示,并由Nios II软核实现了基于Sobel算子的图像边缘检测算法。采用此系统不仅可以获得良好的实时性,还能大大简化图像处理系统的软硬件设计。展开更多
文摘Due to the increasing number ot diabetic patients, the number of people affected by diabetic retinopathy isexpected to increase. Diabetic retinopathy is a complication of diabetes and the most serious frequent eye disease in the world. Large-scale retinal screening for diabetic patients is necessary to prevent visual loss and blindness. The analysis of digital retinal images, obtained by the fundus camera, is viewed as a feasible approach because retinal blood vessels have been shown to change in diameter, branching angles, or tortuosity as a result of diabetic retinopathy. The morphological change can help identify the different stages of diabetic retinopathy. In addition, the acquisition of retinal image is nonintrusive and low cost. Automatic segmentation of the retinal blood vessel is a prerequisite for this analysis.~3 This article presents a method to detect blood vessel based on sobel operators.4 Small and fast computation is the outstanding merit of this method.
文摘介绍了基于可编程片上系统(system on programmable chip,SOPC)技术的图像处理系统的软硬件设计,创建了CMOS图像传感器控制器IP核和VGA显示控制器IP核,实现了图像的采集和显示,并由Nios II软核实现了基于Sobel算子的图像边缘检测算法。采用此系统不仅可以获得良好的实时性,还能大大简化图像处理系统的软硬件设计。
