MIsmatch between left and right side

Question

Rd 2020-7-17

回答： Image Analyst 2020-7-17

img = im2double(imread('veinvein.jpg')); % Read the image
img = imresize(img,0.5);               % Downscale image
fvr = lee_region(img,4,20); 

edges = zeros(2,img_w);
edges(1,:) = y_up;
edges(2,:) = round(y_lo + size(img_filt_lo,1));

It shows mismatch while run the above code

ERRORS:

Unable to perform assignment because the size of the left side is 1-by-161 and the size of the right side is 1-by-483.

Error in lee_region (line 61)

edges(1,:) = y_up;

Error in feature (line 11)

fvr = lee_region(img,4,20); % Get finger region

Answer 1

Image Analyst 2020-7-17

What is img_w and y_up? How did you get img_w (I'm guessing you used the size() function incorrectly for an image).

So, since the 2-D matrix "edge" has 161 columns in it, why do you think you can stuff 483 elements into it?

Strangely enough 483 is 3 times 161, so it further substantiates my guess you incorrectly did

[img_h, img_w] = size(img);

instead of the more correct:

[img_h, img_w, numberOfColorChannels] = size(img);

So if it's a color image, your img_w would be 3 times what you expect, which is exactly what's happening.