How to modified maximum pixel value in logical array
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Hello everyone i hope you are doing well.
I have the following image in which white pixel value exist 35,40,45,55
- I want to find the maximum pixel (index) for example in above 55 is the maximum pixel (index) then add 50 pixel in to to make new maximum value to 105
- Then i want to divided the each pixel value with the maximum value(105). Then map the value to 10000 e.g multiple new pixel value with 10000 so it will map between 1 to 10000
I have find the maximum and minimum pixel value as 35 and 55
idx = find(mask);
row1 = min(idx);
row2 = max(idx);
How can i do it in matlab
回答(1 个)
DGM
2022-8-13
编辑:DGM
2022-8-13
I'm going to post this as a tentative answer. I doubt my interpretation of your intent is wholly correct, but it's probably correct enough to demonstrate inroads to a satisfactory answer.
% get mask array
load mask.mat
% get y-centers for each blob
CC = bwconncomp(mask,4); % picking 4-connectivity is important here
S = regionprops(CC,'centroid');
ycenters = vertcat(S.Centroid);
ycenters = ycenters(:,2); % y-center of each blob
% get input and output range
inrange = [min(ycenters) max(ycenters)+50]; % [35 105]
outrange = [1 10000];
% get rescaled values for each blob
blobvals = (outrange(2)-outrange(1))*(ycenters-inrange(1))/(inrange(2)-inrange(1))+outrange(1);
% recolor image according to calculated blob values
outpict = zeros(size(mask)); % preallocate
for b = 1:CC.NumObjects
outpict(CC.PixelIdxList{b}) = blobvals(b);
end
% [35 105] is scaled to [1 10000]
% but bear in mind that 55 is smaller than 105
pxrange = [min(nonzeros(outpict(:))) max(nonzeros(outpict(:)))]
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