Create dequantization.m

Author: yolanda93

Quantization/dequantization.m

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+% dequantize_matrix:
+% Uniformly projects a matrix with a number of levels (2^old_bytesize)
+% into a new matrix with a number of levels (2^new_bytesize)
+function dequantized_matrix = dequantize_matrix(matrix, old_bytesize, new_bytesize)
+avg_point = 2^(new_bytesize-old_bytesize-1);
+dequantized_matrix = zeros(size(matrix,1),size(matrix,2),'uint8');
+for row = 1:size(matrix,1)
+    for col = 1:size(matrix,2)
+        dequantized_matrix(row,col) = dequantize(matrix(row,col), avg_point);
+    end
+end
+
+function dequantization = dequantize(pixel, avg_point)
+dequantization= avg_point*(pixel + 1);
+end