Show HN: Swapping Position and Brightness in Grayscale Images

Re:Show HN: Swapping Position and Brightness in Grayscale Im... by no_gravity on Wednesday December 20, 2017 @05:31AM (#15968483)

Correct! In fact, I already use a poor mans average. Initially newImage is all black and then:

    b=oldImage[x,y];
    xa=(newImage[b,y]+x)/2; // poor mans average
    newImage[b,y]=xa;

Would a proper average improve the image further?

Let's see...

...here we go: No average on the left, poor mans average in the middle, proper average on the right:

Yup, it's better. I updated the page with the proper average algorithm now.

Thanks, Brian!

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Re:Show HN: Swapping Position and Brightness in Grayscale Im... by brian-armstrong on Wednesday December 20, 2017 @03:52PM (#15973701)

Awesome! The background gradient bar seems reasonable now, you can see that it's about hakf brightness which makes more sense to me :)

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