Size Reduction: Color Image Test

For my third trial, I used a 512x512 color image. I used the same three methods to get 128x128 images.

Comparing the 128x128 images with the original:
Original Image
Pixel Skipping
Pixel Averaging
Discrete Wavelet Transform

Without looking at these very hard, it is difficult to see differences. The Pixel Skipping image has some color artifacts which show up as green dots all over the image. They are most obvious against constant color backgrounds, such as my shirt (light blue, on right side).

The Pixel Averaging and DWT images are hard to compare unless you blow them up. Then the DWT image can be seen to have better color gradations and fewer color artifacts. However, both images are very good at the regular size.

Go to the last example: Greyscale Image Go to the main text: Image Size Reduction Algorithms