Convert dds to hrz Online: dds2hrz
You can use Tom's Editor to easily convert images from
Direct Show Surface
.DDS to Slow Scan Television
Tom's Editor is a free, online image manipulation and converter program.
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DDS are files invented by Microsoft to be used in games, mostly as textures. Images can be compressed to save space but the compression methods defined by DDS are all very fast in terms of coding and decoding.
Slow Scan television is an image transmission method sed mainly by amateur radio operators.