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but bitmap image c# is a high quality image even though its size is big. if we cannot upload,then we have to convert in image editing tool.
 

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you can't say bitmap is a fail, that's not true, it's actually better, just too big

basically an image is constructed of 'bits' .. if you zoom all the way in you see it's a bunch of coloured squares, read from top left to bottom right it might be red red red blue blue red red red green green green etc.

jpeg (and other compression types) changes that to 3 x red / 1 x blue / 3 x red / 3 x green. and that takes up less file space

however, the quality can be affected by jpeg compression, if there is red red red slightly darker red, but it saves it as 4 x red, if you see what i mean

therefore, actually JPEG is the fail type, not bmp. depending on what quality it is saved as. really, all files that have been compressed for web format are weak, purely because they have had to be reduced in size

so there you go, knowing is half the battle etc
 

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same as.. WAV files are far superior to MP3 / WMA etc because in compression the extremes of the sounds are trimmed down to save on data being saved. so with compressed music files (Again depending on quality chosen) you can end up with a muted flat sound with no real extremes, which is more or less useless if the music you like has what is referred to a dynamic contrast, i.e. orchestral / brass / big band, anything with 'real' instruments that aren't just a synth going DMM DMM DMM DMM DMM (or with skrillex, DMM WEEEEEEEEEE CHCHCHKKKK CHCHCKK DMMM WAWWAWAWA BABABA MMM WEEEEEKKK etc)

may have wandered slightly off topic here
 
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