Evidence light table
Measure the frame.
Waiting for an image.
Bundled reference
Ready for a local sample
Put the pixels under a lens.
Analyze the bundled reference or choose a local image. The result is a measured screening record, never an authenticity guarantee.
Canny edge density
--Laplacian variance
--High-frequency mean
--DFT high-band ratio
--Heuristic triage: --
Quadrant consistency
0 quadrants| Region | Edges | High-frequency | Reading |
|---|
cvtColor grayscale · Canny edges · Laplacian variance · dft spectrum · equal quadrant comparison