Hallucination = vessels that are invented, missing, displaced or distorted compared with the original. Answer Yes = passes, No = hallucination. Ignore changes of color, brightness and sharpness.
In the picture: blue = vessel only after enhancement · red = vessel lost after enhancement · yellow boxes 1–4 are zoomed in panel D. The automatic marks can be wrong; your judgement decides.
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How to review
For each case, look at the enhanced photograph (B) and compare it with the original (A). Panel C shows where vessels changed; panel D zooms into the yellow boxes: original · enhanced · enhanced with outlines · red-free original.
Click No if the enhanced image has invented, missing, displaced or distorted vessels; otherwise click Yes (passes). The next unanswered case opens automatically. You can return to any case from the list on the left and change the answer.
Keys: Y yes, passes · N no, hallucination · ←→ previous / next · Enter enlarge the image.
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