## Questions about image intensity

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chineduiroanyah
Posts: 1
Joined: Mon Apr 23, 2012 6:32 pm

### Questions about image intensity

Good day all,
I am a final year computer Science student doing a project that involves image processing using java which am totally new to, and I have been faced with a major challenge. i have been able to get 2 dimensional arrays of the red, green and blue values for each pixel in an image.how can i calculate the mean grey intensity of the image from these arrays? please I would be most grateful if anyone could be of help.

Mark
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### Re: Questions about image intensity

Hi,

Although this isn't a Java forum, maybe I can help. There are many ways to calculate the "grayness" of a colour value. This website proposes one that seems pretty simple. Another possibility is to convert RGB to HSV and use the V value for brightness. The latter is what Color Converter does. If you want a different method, just look for other solutions on the internet. They are everywhere.

Kind regards,

Mark
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philip9
Posts: 3
Joined: Tue Feb 14, 2017 12:22 pm

### Re: Questions about image intensity

Seems to me that it is simply be the sum of all the r,g, b values for the all the pixels, divided by the number of pixels divided by 3.