The information in this article applies to:
SUMMARY
If you insert a Portable Network Graphic (PNG) image in a PowerPoint slide,
any semi-transparent portions of the image appear grainy (dithered). If you
examine the image closely, the semi-transparent areas of the picture appear
to be drawn by alternating pixels of the foreground color with pixels of
the slide background color.
MORE INFORMATION
A PNG file is a type of bitmap. In other words, the picture data is stored
as a rectangular array of dots of different colors. Each dot is described
as a mixture of 256 shades of red, 256 shades of green, 256 shades of blue,
and (optionally) 256 shades of transparency. The transparency component is
called an alpha channel.
Additional query words: ppt8 ppt97 clear pattern moire interference Portable Network Graphic Alpha Mask
Keywords : kbdraw |
Last Reviewed: November 8, 1999 © 2000 Microsoft Corporation. All rights reserved. Terms of Use. |