CompuServe Thread

IFF SHAMS

2 messages in this thread
#23230From: Sergio PozzettiOct 13, 1989 8:48 AM
I see.By the way….What is exactly "Sliced Hold and MODIFY"?And one more question…When I execte the GIFTOTMP command why do GIFS become 10 times bigger?? Thanks,<<Sergio>>
#23286From: Steven BennettOct 14, 1989 9:50 PM
"Sliced Hold and Modify", aka SHAM, is a variation on the "Hold and Modify" (HAM) display mode of the Amiga. Normal HAM images are based on a palette of 16 colors, and all other colors on the screen are formed by holding the color of the previous pixel and modifying it. What SHAM does is change the values used in that 16 color palette during the display of the image (once per line, in fact), so that more pixels can be based on the palette colors, and therefore the image looks a lot smoother. As for why GIF files grow so large when converted to TMP files, you have to realize that GIF images are heavily compressed to start with, and that TMP images are not compressed at all. Also, the raw data is in a larger format with the TMP files, so that multiplies the size difference there too. –>Steve Bennett