red Pixel values in ditinct points
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I have a separate part of the picture. Had placed the image into a new coordinates. How can I get the red Pixel values in the points of x-y coordinate?
回答（1 个）
Image Analyst
2014-4-25
0 个投票
See my color segmentation demos in my File Exchange. They do that (find red pixels), though I'm not exactly sure what you mean by "points of x-y coordinate".
8 个评论
fereshte
2014-4-25
Image Analyst
2014-4-25
OK, you can do that, just segment it to get a binary image, redMask, and then use find and mean:
[rows, columns] = find(redMask);
meanX = mean(columns);
fereshte
2014-5-12
Image Analyst
2014-5-12
Try this:
greenLine20 = rgbImage(20,:,2); % Extract line 20 of the green channel.
meanGreenLine20 = mean(greenLine20); % Get its mean.
fereshte
2014-5-12
Image Analyst
2014-5-12
The 2 means color channel 2, which is green. Here, run this code:
rgbImage = imread('peppers.png');
greenLine20 = rgbImage(20,:,2); % Extract line 20 of the green channel.
meanGreenLine20 = mean(greenLine20); % Get its mean.
Do you get a 512 element long array for greenLine20? And a value of 36.3770 for the mean? If you don't get that for your image, then attach it.
fereshte
2014-5-13
Image Analyst
2014-5-13
Okay, whatever...as long as you got it working.
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2014-5-13
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