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Retinex / Illumination Correction — Free Online Tool | Pixlane
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.
Frequently Asked Questions
What is Retinex illumination correction used for?
It helps recover shadow detail and reduce uneven lighting so downstream analysis, OCR, thresholding, or manual inspection can work on a more readable image.
Should I use single-scale or multiscale correction?
Single-scale correction is useful for lighter local adjustments, while multiscale correction is useful when strong illumination gradients or shadows need more aggressive normalization.
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Retinex Illumination Correction
Retinex / Illumination Correction — Free Online Tool | Pixlane
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.
Frequently Asked Questions
What is Retinex illumination correction used for?
It helps recover shadow detail and reduce uneven lighting so downstream analysis, OCR, thresholding, or manual inspection can work on a more readable image.
Should I use single-scale or multiscale correction?
Single-scale correction is useful for lighter local adjustments, while multiscale correction is useful when strong illumination gradients or shadows need more aggressive normalization.
What Retinex / Illumination Correction Is Useful For
Retinex illumination correction is useful when an image suffers from glare, dim corners, harsh shadow gradients, or lighting that makes later analysis harder. It helps normalize illumination before OCR, thresholding, segmentation, inspection, or visual review by lifting dark regions without flattening all local detail.
How to Run Retinex / Illumination Correction in 3 Steps
Upload. Upload your input image via the upload zone. Most dev tools accept JPG, PNG, and WebP input for fastest processing.Process. Tune the algorithm parameters using the control panel — watch the live preview update as you adjust thresholds, kernel sizes, and other settings.Download. Export the processed image or result visualization. Use it directly or continue to another dev tool in your pipeline.
Why Use Retinex / Illumination Correction in the Browser
Instant Feedback — See parameter changes reflected in real time. No recompile, no Python environment setup, no Jupyter kernel.Teaching-Friendly — Perfect for demonstrating classical computer vision concepts in class without installing OpenCV locally.Prototype Faster — Test algorithm behavior on real images before writing production code.Zero Install — Built on OpenCV primitives compiled to WebAssembly — full featured, fully local.
Retinex / Illumination Correction FAQ
What computer vision library does Retinex / Illumination Correction use?
Retinex / Illumination Correction is built on OpenCV primitives compiled to WebAssembly. You get the same algorithms as the desktop OpenCV library, running with near-native performance in your browser.
Can I download the processed result?
Yes. Every dev tool supports exporting the processed image or visualization as PNG. You can use it in documentation, papers, or downstream tools.
Are there parameter presets?
Retinex / Illumination Correction ships with sensible defaults that work for most images. Adjust the controls to experiment with different parameters — changes reflect in the live preview immediately.
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