How do I find the white pixel in the row/column
2 次查看(过去 30 天)
显示 更早的评论
I can find the centroid of an white pixel image. I want to find the first/last white pixel in the row/column to calculate the distance of x and y.
0 个评论
回答(1 个)
Vilém Frynta
2023-2-9
编辑:Vilém Frynta
2023-2-9
Hope this answers your question.
img = imread("pic1.jpg"); % loading your picture
img = rgb2gray(img); % convert to black-and-white pic
row = 450; % choosing random row
idx = find(img(row,:)==0); % position of all white pixels in row 450
diff = idx(1) - idx(end) % difference of first and last pixel in row 450
This should work fine. I noticed your white == 0 and black == 255.
Also, this is for chosen row. If you change this a bit, you can get it for any column.
0 个评论
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Convert Image Type 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!