determine quantity of pixel in one image

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cuong nguyen
cuong nguyen le 24 Avr 2014
Commenté : Image Analyst le 5 Mai 2014
HI ALLS!
i am working an square's grayscale image 252*252, now i just wanna to focus on smaller area in this image and count how many pixels this area have in there.
hope you guys help me! thanks so much!

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Image Analyst
Image Analyst le 24 Avr 2014
See my attached demo where you can hand-draw some region (doesn't have to be rectangular) and it will report the area and do some other stuff too, like masking.

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José-Luis
José-Luis le 24 Avr 2014
Well, that would depend on the area, wouldn't it?
number_of_pixels = width * height;
cuong nguyen
cuong nguyen le 5 Mai 2014
sorry to reply lately! Thanks you guys!
Imange Analyst : Does it count the pixels of each grayscale level?
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Image Analyst
Image Analyst le 5 Mai 2014
I don't think so, but you can pass the pixels into hist().

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