This post is part of the digital imaging lab for CSC 101.
This is the original image.
This is a version of the image at which the JPG compression quality was set to 20. There are notable compression artifacts when it is viewed at full size (click the thumbnail to see the fullsie image). It is still the same resolution, but there is less data stored for the jpg decoder to reconstruct the original pixel values, resulting in degraded image quality.
This is a grayscale version of the original image. If it were uncompressed, it would require only 8 bits per pixel instead of 24, as many more colors must be mapped to than shades of gray to produce an acceptable range. However, once jpeg compression is run on the image, the space savings are diminished considerably, at least in part because jpeg compression focuses much more on chrominance than on luminance, and all of the chrominance information is still present.
