[ft-devel] GSoC - Image comparison in test framework

[Arvinder Bhathal]

Hello,

I'm interested in the project to develop a test framework and was
trying to get a better idea of what the image comparison between the
baseline and test glyph/image would involve.

As I see it, there are many different ways to go with the comparison.
A basic method might be comparing pixel-by-pixel, using for example
the RGB or HSV values to look for and quantify possible differences. A
more interesting method I came across included computing
color/brightness histograms for each image and combining this with a
measure of the texture of the image by performing edge detection on
the images.

I was wondering what direction you wanted to go with the method of the
comparison. Is the goal to get a fast and simple measure of the
differences between images/glyphs, with any basic method as mentioned
above? Do we want a more robust method that works with rotations or
scaling differences?

I appreciate any guidance,

Regards,

Arvinder Bhathal (arv)
(Studying Computer Science at Western University in London, Canada)