help. detect if pixels in an expanding radius is darker than a threshold

Programming Questions

johannesgj

help. detect if pixels in an expanding radius is darker than a threshold

in Programming Questions • 2 years ago

i want to be able to detect if the pixels nearby a coordinate is darker than a threshold.
i want to use a for loop to loop through an expanding radius while analysing the radiant pixels. if i find a pixel that is darker than the threshold i want to go on. (need help on this)

if you have any ideas how to determine which of the found pixels in the radius to choose please say it out loud :-)

im trying to develop a drawing algorithm but its really dificult.

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allways on the lookout for new toys to mod
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Replies(1)

heedless

Re: help. detect if pixels in an expanding radius is darker than a threshold

2 years ago

What part do you need help on? Do you know how to read the pixel values?

I think you're looking for something like this:

int threshold = 80;//set a threshold
loadPixels();//put the pixels of the stage into 'pixels'
for(int i= 0; i < pixels.length();i++){//lop through all the pixels
if(brightness(pixels[i]) > threshold){//check for the threshold
//do something
}
}

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