Portable Network Graphics (PNG)

Square Snakes

64kSnake.png
317 kbytes  (1024x1024 by 16 bits)

For an interesting complement to the above Image of 65536 Greys, play with my interactive Page of 60,480 Colors	sihWheel7.png 66 kbytes (Adam7) (632x546 by 24 bits)
For you square-snake lovers, click on over to the original home of pseudoGrey.  See how to squeeze 1786 levels of grey from an image which only provides 256.	pGrey1.png 1132 bytes (64x64 by 24 bits) 1786 levels of grey

Round Snakes I have not forgotten the round snake lovers, but caution! The following image uses an "anomalous motion illusion", which might make sensitive observers dizzy or sick. Should you feel dizzy, you had better scroll past this image quickly.

rotsnake_cropped.png, 115 kbytes, 599x477 pixels, 8-bit image from Rotating Snakes, Copyright A.Kitaoka 2003 No, it's not really moving.  At least I don't think it's moving...

Clicking the image above brings you to the English version of Akiyoshi's illusion pages. Dr. Akiyoshi Kitaoka is an Associate Professor of psychology at the College of Letters, Ritsumeikan University, Kyoto, Japan. Unfortunately his site uses mostly GIF images along with a few JPEG images. Even so, they are amazing!

The optical illusion of motion reminds me of the quest to build a perpetual motion "overbalanced wheel".  In the case of the rotating snakes, though, your eye and mind make it work. Dr. Donald Simanek is Professor of Physics at Lock Haven University of Pennsylvania. His Museum of Unworkable Devices is another great site (which unfortunately uses GIF images). <sigh>  Maybe it's a doctor thing... cage-t.png 134x124 by 64 greys

Full Color Break!

peppers.png  (aka 'hell.png') 659 kbytes  (512x512 by 24+8 bits)	GreatWave.png 354 kbytes  (800x538 by 8 bits)

The 'peppers' image is by Lee Crocker of SwRI.
If you have a slow internet connection it will take
a while to show up (but it's worth it!).
'GreatWave' is also a large file, but it's a classic
which deserves to be preserved in pristine form.

Check out the newly PNG'd  (pang?) Kodak PhotoCD PCD0992 Use above link to get to all 24 thumbnails. The images are large, 24 bits, and lossless.

kodim22.png  686 kbytes

Monitoring the Monitor

ceMonTest.png
11 kbytes  (1024x1024 by 11 bits)

Don't		click		these
	iSMPTE.png	4096x4096	SMPTE.png
	156 kbytes	by 12 bits	104 kbytes
unless you are on a Unix system or have shiploads of memory!!

Actual 16-bit Scan

42uResChart.png

Graphics at Work

401k1.png,  Business Graphics Example