Create README.md

Author: markusMM

README.md

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+# CLAHE GUI
+
+This is supposed to ba a simple GUI to demonstrate the effect of Constrastive Limited Adaptive Histogram Equilization on any type of input image.
+
+## What is Contrastive Limited Adaptive Histogram Equilization (CLAHE)
+
+A CLAHE actually takes the LAB components of the image and calculated a histogram decomposition for each channel for a specific patch size.
+ For each patch:
+
+   - take histogram distribution
+   - calculate the excess from the clip limit
+   - distribute this excess equally over all non-excessing pixels
+   - overlay with gaussian frame
+
+Then it takes the overlapp average over all patches, reconstructing the original image equalizes.
+
+This app additionally reconverts the color space back to BGR and displays the result.
+
+![image of CLAHE steps](./img/CLAHE.png)
+*Demonstration of CLAHE processon images (MATLAB (c))*
+
+## Requirements
+
+- OpenCV
+- Spring