.PNG images require compression?

dragonguy: *Does

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PCX is a compressed picture format. Generally, it loses quality and can be compared to PNG8 or GIF which are more sophisticated and recent formats.

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Last time I checked, PCX was lossless. It supports palette-indexed images from 2 to 256 colours, and it was extended to support 24-bit images too.

Even if it would only have had support for palette-indexed images, it would still be lossless (you might have to perform some lossy operations to reduce the number of colours to 256 or less, but that does still not make the format itself lossy).

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Originally Posted by Sphax

BMP is generally an uncompressed picture format or a compressed one with the simple RLE compression. BMP don't lose quality.

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TGA is the same, indexed or true colour options, uncompressed or RLE

So let me get this straight.

.png - Portable Network Graphics - Lossless Quality, Maximum Compression.
.jpg - Lossmore Quality, Maximum Compression.
.bmp - Bitmap - Lossless Quality, No Compression or RLE, True Colour or Indexed.
.pcx - Lossless Quality, True Colour or Indexed.
.tga - True Vision Targa - Lossless Quality, No Compression or RLE, True Colour or Indexed.
.tif - Dunno.
.blp - Dunno.
.gif - Animation.
.ico - Icon.
.fnt - Font.
.vxl - Voxel.