Hello. I have some questions about art of the digital medium. I will proceed to break my question into multiple parts.
I. Is it possible to have a .BMP with loss compression? I would like to send my friend a picture of .BMP (it's the best quality) but I want so much compression that loss may be used. I also want to know please if there is a lossless .JPG format. I want to see good quality in the .JPG sometime.
II. Are there any image program that use more than 32-bit color depth? I would like to have something more like the 64-bit color depth. My friend says he has a brother that made pictures with 64-bit color and it makes about 9 bytes per color or something that really high. Is there any way to make buy a program like that does more than 32-bit color?
I don't think it's possible, and I may be wrong but I'm pretty sure .PNG is a completely lossless format.
I personally think PNG is the best format, good quality and not so big image files. I prefer using it instead of BMP and JPG.
I just use PNG for everything. Alpha channel, lossless compression, and the file size is only an issue if you're still on 56k.
Ahaha. STEER THE FUCK AWAY FROM BMP. BMP has absolutely no good use at all.
PNG is loseless and supports transparency. It should be used whenever it gives good filesizes. Typically if you want to keep transparency or your image has many blocks of the same colour or few colours in general (like a screenshot of this forum, pixel art, minimalistic art, etc) then PNG is in 99% of the cases the best choice.
When you have a photo or an image with a lot of different coloured pixels in general JPEG will be the best choice in 90% of the cases (sometimes beaten by PNG, but seldom).
If you have animation you either have to use GIF or Animated PNG (APNG. Only supported by Firefox and Opera so far and doesn't have many programs that allows you to create it)
Why in the hell would you need 64-bit colour? Photoshop is a professional working tool, used in business for all sorts of works requiring the highest quality possible, and they usually do their work in 8-bit or 16-bit.
[QUOTE=KD007;30750383]II. Are there any image program that use more than 32-bit color depth? I would like to have something more like the 64-bit color depth. My friend says he has a brother that made pictures with 64-bit color and it makes about 9 bytes per color or something that really high. Is there any way to make buy a program like that does more than 32-bit color?[/QUOTE]
normally images are 24-bit, i.e. 8 bits per channel. 32-bit images are 24 bits of RGB + 8 bits for an additional alpha layer
you can get images with 16 bits per channel, so 48 total, but chances are your monitor can't display that for what it actually is. i only ever use 16 bits per channel when editing photos as an intermediate stage (less posterisation)
photoshop lets you change the colour depth
Quite alot of programs can do bit depth higher than 32, but it's usually listed as bits per colour, not bits per pixel. 8 bits per colour is standard and 16 bit is good for camera raw formats and renders. PNG stores them both.
32 bits per colour (128 bits per pixel) is good as High Dynamic Range for storing true luminance values and is usually created from a composite of several 8-bit photos taken at different exposures. This is good for lighting environments in like a 3d program and is also good for a few things regarding design and motion graphics, high intensity lights glow when blurred rather than just blur. In Photoshop not many things actually support 32-bit though, you only have some adjustments and some filters etc. The best format for these is usually .hdr
To be honest, there is no real reason to go beyond 8 bits per colour unless you're doing something involving 3d work of some kind.
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