Hoe to find histogram count
조회 수: 1 (최근 30일)
이전 댓글 표시
I'm working on CBIR using entropy, where entropy of an image can be calculated using formula -sum(p.*log2(p)). where 'p' defines histogram count of an image. MATLAB has an inbuilt command _histc_to find histogram count, and the syntax is histc(x,edge,dim) and I'm not getting what edge is, I've a bitmap image x for which i need to find histogram count. what is 'p' ? is it a vector or a matrix?
댓글 수: 0
답변 (1개)
Image Analyst
2013년 4월 16일
Then why not use imhist():
[pixelCount, grayLevel] = imhist(grayImage, 256);
With histc(), you have to define the edges and it bins everything in between the edges. The equivalent to imhist() might be
edges = -0.5 : 1.0 : 255.5; % Edges for a grayscale image.
[pixelCount, grayLevel] = histc(grayImage, edges);
댓글 수: 0
참고 항목
카테고리
Help Center 및 File Exchange에서 Data Distribution Plots에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!