Sum of Pixels in an image

Question

Tri Rowstenkowski 2021-2-8

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/739307-sum-of-pixels-in-an-image

回答： Walter Roberson 2021-2-8

采纳的回答： Walter Roberson

VAD.png

在 MATLAB Online 中打开

Hi,

I have been trying to calculate the Vessel density which is the total image area occupied by the vasculature to the total image area in the binary vessel maps. Here's my code:

I=imread('VAD.png');
figure,imshow(image_read)
I_gray=rgb2gray(I);
figure,imshow(I_gray);
SumPixels = sum(I_gray(:));
T = adaptthresh(I_gray, 0.25);
BW = imbinarize(I_gray,T);
figure,imshowpair(I_gray, BW, 'montage')
Pixels = sum(BW(:));
VAD=Pixels/SumPixels

I am not sure if I am doing it the right way. How should I calculate the sum of pixel occupied by the vessel as the binary conversion gives a whole different value. Any help would be appreciated.