how to get binary image from histogram?

2014 3 13
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更新时间：2014 3 14
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I'm new to matlab. Some on please help me to obtain binary segmentation form histogram.
thank you

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回答（1 个）

Image Analyst
Image Analyst 2014-3-13

0 个投票

You pick a threshold and then do
binaryImage = grayImage < thresholdValue;
if you want any more advice, post an image and say what you want to find or measure. The threshold can be chosen form the histogram, for example from my interactive thresholding application: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862

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Ibrahim Thorig
Ibrahim Thorig 2014-3-13
Dear;
thank you for the support. I actually want get history gram of the attached and convert the history gram to binary segment.
thanks
Image Analyst
Image Analyst 2014-3-13
I don't know what a history gram is. Can you explain it? And what part of the image do you want to be true and what part to be false?
Ibrahim Thorig
Ibrahim Thorig 2014-3-14
sorry its histogram, initially generate histogram of the image, then remove background, so the only white area (image) should show.
Image Analyst
Image Analyst 2014-3-14
[pixelCounts, grayLevels] = imhist(grayImage, 256);
binaryImage = grayImage < 128;
Do the above thresholding for each color channel and then AND the 3 binary images to get the overall binary image for the color image.

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