Feature: Percentage-based similarity

[jwir3]

Right now, looks-same measures each individual pixel, and if even one exceeds the difference tolerance, it returns a failure. It would be nice if there was a mode where we could specify "I expect X% of the pixels to be the same".

In other words, if one or two pixels don't match, then still pass the test, but if a large number of pixels don't match, then it should fail the comparison.

[KuznetsovRoman]

Hi. This package does not throw errors on comparison fail.

"looks-same" function with options "createDiff: true" returns "differentPixels" as well as "totalPixels":

looks-same/index.d.ts

Lines 82 to 85 in 7e12fe8

	interface LooksSameCreateDiffImageResult extends LooksSameBaseResult {
	differentPixels: number;
	totalPixels: number;
	}

You can call the function with any params as you want (strict / tolerance) and then divide "differentPixels" by "totalPixels" in order to get difference in percents.

Then you can decide, what to do with it: throw an error or something like that.

Does it solve your problem?