Description: Write MATLAB functions to quantize grayscale image with given quantization step Q.
Process the given test images “Lena” with quantization steps Q=2, 4, 8 16, 32, 64, 128.
Calculate the MSE for the original and quantized images using MATLAB methods written for
the Task 1. Plot the MSE for the test image as a function of quantization step Q.
Show quantized images and the corresponding histograms for each quantization step Q. Show
the test image and its histogram.
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