Dina Pebriyanti

@PerleLabs Middle The Leaning Tower image looks slightly too clean and evenly lit, with very uniform texture and symmetry in the details. It feels a bit overly polished compared to the more natural sky variation and atmospheric softness in the left and right images.

Alright… this is it. Final Human CAPTCHA challenge 👉👉 We saved the best for last. There are 3 images. Only ONE is AI-generated. Your job is to tell us if it's the one on the Left, Middle, or Right. Submit your guesses by Sat, Feb 28 at 11:59pm UTC. As usual we'll be revealing the answers on Sunday! If you got 3+ right, we’ll share how to claim your reward next week.

@yoru_shin @PerleLabs Left My opinion is that the one on the left is a real photo, compared to the other balls it looks the most realistic, the right ball is broken with many bugs, when you zoom in it is noticeable, the central ball immediately noticed that it is AI

@PerleLabs Left because the lighting distribution, volumetric depth of the clouds, and fabric texture of the balloon look the most natural; the way sunlight transitions across the surface and the subtle glow from the burner feel physically consistent.

It's the final week of Human CAPTCHA: Round 7 You made it this far… but we’re not going easy on you. One of these is a real photograph of a hot air balloon, the rest is AI-generated. Can you tell which one it is? Respond with Left, Middle, or Right and tell us why below! Submissions close Sat, Feb 28 at 11:59pm UTC. Answers revealed Sunday.

@PerleLabs Left My opinion is that the one on the left is a real photo, compared to the other balls it looks the most realistic, the right ball is broken with many bugs, when you zoom in it is noticeable, the central ball immediately noticed that it is AI

@PerleLabs Right The lighting shadows building details and the texture of the road all look more natural and consistent.

Perle Human CAPTCHA #6 🏎️ One of these sports car photos is real. The other was generated by AI. Comment “left” or “right” with your guess, and tell us why 👀 Submissions close Sat, Feb 21 at 11:59pm UTC. Answers revealed Sunday.

@PerleLabs right The photo on the right is a well-documented real location: Positano on the Amalfi Coast in Italy. The architecture, beach, and mountainous coastal landscape match the real-world town perfectly, and this exact view is widely photographed.

Perle Human CAPTCHA #5 📸 Let’s keep your captcha streaks alive. One of these vacation photos is real, and one was generated by AI. Which one is real? Reply "left" or "right" and explain why ↓ This week's submissions close Sat, Feb 21th at 11:59pm UTC. Both answers will be revealed on Sunday.

@PerleLabs Right The tiger's limbs and paws appear distorted and unnaturally positioned on the branch, lacking the proper weight distribution and muscle tension of a real animal in that pose.

Perle Human CAPTCHA #4 It's time to put your human judgement to the test again. One of these images of a tiger is a real photograph, one was generated by AI. Which one is real? Reply "left" or "right" and tell us why ↓ This week's submissions close Sat, Feb 14th at 11:59pm UTC. Both answers will be revealed on Sunday 👀

@PerleLabs Right the left image shows signs of AI generation:The background artwork has distorted, nonsensical shapes and text, which is a common artifact in AI-generated images.

Perle Human CAPTCHA #3 📷 One of these images of fruit is a real photograph, one was generated by AI. Which one is real? Reply "left" or "right" and why 👇 You have until Sat, Feb 14th at 11:59pm UTC. This week's answers will be revealed on Sunday.

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