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martes, 5 de mayo de 2015

"That's not a hamburger"

When we were first told about image matching captchas, the examples we saw included animal matching which is only something like 1 out of every 20 image recaptchas at this point. Instead, it's pizza, coffee, wine, beer, steak, hamburgers, pasta, cake, bread, ice cream, sushi, the nebulous "rice dishes," and now sandwiches. On a retina display, most of these images are small, often dark and set against visually busy backgrounds which means it isn't just AI you're confounding. The other irritation is getting requests for "hamburger" or "steak" where the matching images are food that's neither: non-hamburger patties like fried chicken on hamburger buns or baby back pork ribs that pass "steak." At least one image that passed "pasta" was a soup with something in it only resembling noodles. "Rice dishes" has so far been pictures of meat or vegetable dishes with rice somewhere in the picture rather than paella or risotto, and it's a strain to examine low-resolution images for it. At first I thought your staff were picking images without looking at them too closely, but to think about it more carefully, a human wouldn't look at a sandwich next to a Chick-Fil-A bag and file it under "hamburger," and I'm including interns as humans here to be generous.  On the other hand, an algorithm designed to find an ovoid shape near image center at least 10% of the image's size with a particular shade of brown in it, a darker colored section below and another edge shape below that matching the first could decide a filet-o-fish or chicken sandwich on hamburger bun met the criteria for "hamburger." It would also explain why there are so few "rice dishes" and most of them are side dishes or why "pasta" only asks for cooked linguine/spaghetti images and never shells, macaroni, fusilli, rigatoni, lasagna, or other conceptually broader definitions. Sushi is a flat color palette of dark green, salmon and avocado, steak is only depicted as charcoaled on top, bread is dry white wheat loaves and never pumpernickel or marble, beer has so far never been dark enough to accidentally match a soft drink's palette, and "sandwiches" are cut and viewed edgewise.  Animal matching doesn't as easily follow that type of shape/color selection which might answer why we see so little of it comparatively.  Let us know if bots are picking our photos for us, okay? We might have some suggestions as to how to make this less monotonous. -- You received this message because you are subscribed to the Google Groups "reCAPTCHA" group. To unsubscribe from this group and stop receiving emails from it, send an email to recaptcha+unsubscribe@googlegroups.com. To post to this group, send email to recaptcha@googlegroups.com. Visit this group at http://bit.ly/1dkFnYd. For more options, visit http://bit.ly/P65DvS.

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