I guess the way to test that would be to sample all the colors in the illusion scene, and use them to randomly color squares in, say, a square grid, and see if any look red, and if so whether it's the same color(s) that looked red in the original illusion.
I believe color constancy is partially based on adjacency of colors as well as whole scene and lighting.
Depending on how you blobbified the image, it may still recall a plateful of something, and the same colors will still be adjacent to each other, so doing the randomized grid test would tell you if it's just the mix of colors or are the other hints coming to play.
It's possible it is just the mix of colors - same way if you wear color tinted glasses (or ski goggles) and the color of everything changes, but in a consistent way, and (maybe after a few min adaptation) you can still discern the colors reliably.
Edit: On second thought that colored goggles example doesn't prove it's just mix of colors - that's just general color constancy more like the strawberry illusion itself.
Yeah, I think you're right. I replied to my other comment describing the effect on my perception of using squares. The blobs did retain an association with the original image, either because I'd just looked at it, or that the shapes were still ever-so-remotely still strawberryish. Since all I did was severely blur the image, the effects of the original lighting would still be very present.
I believe color constancy is partially based on adjacency of colors as well as whole scene and lighting.
Depending on how you blobbified the image, it may still recall a plateful of something, and the same colors will still be adjacent to each other, so doing the randomized grid test would tell you if it's just the mix of colors or are the other hints coming to play.
It's possible it is just the mix of colors - same way if you wear color tinted glasses (or ski goggles) and the color of everything changes, but in a consistent way, and (maybe after a few min adaptation) you can still discern the colors reliably.
Edit: On second thought that colored goggles example doesn't prove it's just mix of colors - that's just general color constancy more like the strawberry illusion itself.