GIF LZW compression operates on horizontal blocks of the same color. Here are two images that are identical except for a 90 degree rotation. The vertical stripe GIF image is nearly twice as large as the horizontal stripe GIF image. The PNG images are the same size.
Format | Horizontal Stripes | Vertical Stripes |
---|---|---|
GIF | 471 bytes | 911 bytes |
Copyright © David Heitmeyer