首先是把输入的图像变成亮度图,再由边界检测的滤镜转换成边界图。GPUImageSobelEdgeDetectionFilter对外的属性有三个,分别是:texelWidth:边界检测时八方向的像素值宽度,默认是1/size.width;(1像素的宽度)texelHeight:边界检测时八方向的像素值高度,默认是1/size.height;(1像素的高度)edgeStrength:边界检测后,对边界的...
float mag = length(vec2(h, v)) * edgeStrength; gl_FragColor = vec4(vec3(mag), 1.0); } ); #endif 二.效果演示 使用GPUImageSobelEdgeDetectionFilter完成图像 Sobel 边缘检测,类似漫画反色,***原图如下: 使用GPUImageSobelEdgeDetectionFilter完成图像 Sobel 边缘检测,类似漫画反色,***效果如下: 三....
GPUImage的Sobel边界检测滤镜是 GPUImageSobelEdgeDetectionFilter。 GPUImageSobelEdgeDetectionFilter继承GPUImageTwoPassFilter,由两个滤镜组成,分别是黑白滤镜和边界检测滤镜。首先是把输入的图像变成亮度图,再由边界检测的滤镜转换成边界图。GPUImageSobelEdgeDetectionFilter对外的属性有三个,分别是: texelWidth:边界检测时...
使用GPUImageSobelEdgeDetectionFilter完成图像 Sobel 边缘检测,类似漫画反色,***原图如下: 使用GPUImageSobelEdgeDetectionFilter完成图像 Sobel 边缘检测,类似漫画反色,***效果如下: 三.源码下载 OpenGL ES Demo 下载地址 : IOS – OpenGL ES GPUImage 图像 Sobel 边缘检测,类似漫画反色 GPUImageSobelEdgeDetectionFilte...
def sobel_edge_detection(image): # 使用OpenCV内置的Sobel算子 sobelx = cv2.Sobel(image, cv2.CV_64F, 1, 0, ksize=5) sobely = cv2.Sobel(image, cv2.CV_64F, 0, 1, ksize=5) sobel_img = cv2.sqrt(cv2.addWeighted(cv2.pow(sobelx, 2.0), 1.0, cv2.pow(sobely, 2.0), 1.0, 0.0)) ...
Edge detection plays an important role in digital image processing. In our study on comparing the LAPLACIAN, SOBEL Edge Detection method, it is inferred that modified SOBEL Edge Detection Method performs better than LAPLACIAN Method and existing SOBEL detection method, in terms of detecting Missing ...
I've got a task to implement Sobel filter which is, as you know, an image processing filter for edge detection. But unfortunately, I've got no experience in image processing field, to the extent that I don't even know how images are represented in computer. Totally no knowledge in this...
L. (1988). Design of an image edge detection filter using the Sobel operator. IEEE Journal of Solid-State Circuits, 23(2), 358–367. Article Google Scholar Clark, J. J. (1989). Authenticating edges produced by zero-crossing algorithms. IEEE Transactions on Pattern Analysis and Machine ...
This MATLAB LiveScript serves as a comprehensive guide to basic image processing operations using MATLAB. The script covers image selection, display, and the application of the Sobel edge detection filter for enhanced visualization of edges in images. The interactive bonus section allows user...
plt.title("Susan Edge Detection") plt.imshow(edge_map, cmap='gray') plt.show() Harris角点检测 Harris角点检测是一种基于局部区域的角点检测算法,它通过计算图像中每个像素点的特征值来判断是否为角点。Harris算法对角点的定位精度较高,对于不同尺度和旋转的角点也能够较好地检测。然而,Harris算法对噪声敏感,...