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Normalize difficult lighting before OCR, inspection, segmentation, or visual review by lifting shadows, reducing illumination gradients, and preserving local detail. Retinex-based correction is especially useful for dim corners, glare imbalance, backlit captures, and documents photographed under mixed light.
Correct uneven lighting and recover shadow detail with Retinex-based illumination correction for OCR prep, inspection, and image readability workflows.
All processing runs locally in your browser. Your files never leave your device — no upload, no server, and no signup required.
It helps recover shadow detail and reduce uneven lighting so downstream analysis, OCR, thresholding, or manual inspection can work on a more readable image.
Single-scale correction is useful for lighter local adjustments, while multiscale correction is useful when strong illumination gradients or shadows need more aggressive normalization.