comprsn-ratio-files.m

How to find compression ratio of an uncompressed image as compared to compressed jpeg images.

K=imfinfo ('skull-50.jpg');
L=imfinfo ('skull-30.jpg');
M=imfinfo ('skull-15.jpg');
N=imfinfo ('skull-5.jpg');

image_bytes=K.Width*K.Height*K.BitDepth/8;
compressed_bytes_K=K.FileSize;
compressed_bytes_L=L.FileSize;
compressed_bytes_M=M.FileSize;
compressed_bytes_N=N.FileSize;
compression_ratio_K=image_bytes/compressed_bytes_K
compression_ratio_L=image_bytes/compressed_bytes_L
compression_ratio_M=image_bytes/compressed_bytes_M
compression_ratio_N=image_bytes/compressed_bytes_N