What the four measurements mean
Brightness estimates overall visible luminance. Contrast measures separation between light and dark pixels. Dark-area coverage shows how much of the frame is near black. Edge detail estimates whether visible shapes remain distinct.
How to act on the result
A very dark image benefits from stability and a small steady light source. Low edge detail can indicate blur, noise, or insufficient illumination. The score is a creative guide, not a forensic measurement.
Frequently asked questions
Does this checker detect a real thermal sensor?
No. It explains whether your goal requires external hardware.
Is my photo uploaded?
No. Photo analysis runs entirely in your browser.
Does the palette chooser edit my image?
No. It recommends a direction using fixed examples.