find the coordinates 5 first white pixels in an image
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Rocío García Mojón
2023 年 8 月 30 日
コメント済み: Rocío García Mojón
2023 年 9 月 4 日
I am trying to find the coordinates of the first 5 white pixels of a black and white image. With the find function I am able to find the first and the last one, but I need more, could someone help me? Thanks
%Find coordinates of the last and first white pixel
%First image
pix_amarelor = imread('pac14_e.png')
[row1first,colum1first] = find(pix_amarelor,1,'first');
imshow(pix_amarelor);
hold on;
plot(colum1first,row1first,'r+','LineWidth',2,'MarkerSize',30);
[row1last,colum1last] = find(pix_amarelor,1,'last');
% imshow(pix_amarillor);
hold on;
plot(colum1last,row1last,'r+','LineWidth',2,'MarkerSize',30)
2 件のコメント
Image Analyst
2023 年 8 月 30 日
Depends on how you define "first". Attach 'pac14.png' and tell us what pixels you consider to be the "first". And format your code as code with the code icon/button.
If you have any more questions, then attach your data and code to read it in with the paperclip icon after you read this:
採用された回答
Image Analyst
2023 年 8 月 31 日
Try this:
% Find coordinates of the last and first white pixel
% First image
pix_amarelor = imread('pac14_e.png');
[row1first,colum1first] = find(pix_amarelor,1,'first');
imshow(pix_amarelor);
hold on;
plot(colum1first,row1first,'r+','LineWidth',2,'MarkerSize',30);
[row1last,colum1last] = find(pix_amarelor,1,'last');
% imshow(pix_amarillor);
hold on;
plot(colum1last,row1last,'r+','LineWidth',2,'MarkerSize',30)
% Find all other pixels in the first column.
col1 = pix_amarelor(:, colum1first);
rowsInCol1 = find(col1)
% Find all other pixels in the last column.
col2 = pix_amarelor(:, colum1last);
rowsInCol2 = find(col2)
3 件のコメント
Dyuman Joshi
2023 年 9 月 1 日
Hello @Rocío García Mojón, if this answer solved your problem, please consider accepting the answer.
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