Processing:
All these pictures have half resolution (linear, i.e. ¼ number of original pixels). After the shrinking procedure they were normalized, i.e. darkest pixel is set to black and brightest pixel is set to white. In between these values a linear gradation applies.

Howto:
Click to thumbnail for viewing the half resolution version! Size of one picture varies from ~12 KB up to ~160 KB, depending on content.
When the half sized image is displayed You may save it to Your disk because now it's already in Your browser's local cache. For saving to disk, please follow the procedures of Your favourite browser.
Going back after viewing half resolution version is handled by browser's back button.
For viewing of downloaded files You may use any common image viewing software which can handle JPEG coded images.