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32bit + ???
- Thread starter JVC
- Start date
8bit panels produce 16.7 million colours, this is a true 24bit (8bit per colour RGB). The human eye can see around 10 million colour (we think) so 24bit is more than we need to produce smooth gradients. 6bit panels (18bit total) are common in the lower end of LCD screens and is quoted as being 16 or 16.2 million colours. this is not true, the real amount is much lower than the human eye can see (262,144 colours).
Even some 8bit panels can have banding in the gradients, there are some high end LCDs that use 10 or 12bit LUT (look up tables) to improve the gradients etc. like Eizo or NEC. It would be nice to see some true 10 or 12bit panels, maybe with LED backlighting things can be improved somewhat but I don't think we need to go too far to get some really impressive quality out of LCD technology. It's almost there now, in the high end anyway.
Even some 8bit panels can have banding in the gradients, there are some high end LCDs that use 10 or 12bit LUT (look up tables) to improve the gradients etc. like Eizo or NEC. It would be nice to see some true 10 or 12bit panels, maybe with LED backlighting things can be improved somewhat but I don't think we need to go too far to get some really impressive quality out of LCD technology. It's almost there now, in the high end anyway.
The Wikipedia bible says:
"32-bit color is a misnomer when regarding display color depth. A common misconception is that 32-bit color produces 4,294,967,296 distinct colors. In reality, 32-bit color actually refers to 24-bit color (Truecolor) with an additional 8 bits either as empty padding space. The reason for using empty space is that all but the newest modern computers process data internally in units of 32 bits."
So disregard what I said in my last post, there is no point going to a true 10/12bit panel as your computer cannot display those pallets (that's not true for the internal panel processing though, LUT for example). 32bit is used for images though in the form of RGBA (A = Alpha - transparency greyscale) where 8bit greyscale values are used for each of the 4 channels.
"32-bit color is a misnomer when regarding display color depth. A common misconception is that 32-bit color produces 4,294,967,296 distinct colors. In reality, 32-bit color actually refers to 24-bit color (Truecolor) with an additional 8 bits either as empty padding space. The reason for using empty space is that all but the newest modern computers process data internally in units of 32 bits."
So disregard what I said in my last post, there is no point going to a true 10/12bit panel as your computer cannot display those pallets (that's not true for the internal panel processing though, LUT for example). 32bit is used for images though in the form of RGBA (A = Alpha - transparency greyscale) where 8bit greyscale values are used for each of the 4 channels.
The closest think in relation to that on Wkipedia is HDR:
"For extended dynamic range imaging, including high dynamic range imaging (HDRI), floating point numbers are used to describe numbers in excess of 'full' white and black. This allows an image to describe accurately the intensity of the sun and deep shadows in the same colour space. Various models are used to describe these ranges, many employing 32 bit accuracy per channel. A new format is the ILM "half" using 16-bit floating point numbers, it appears this is a much better use of 16 bits than using 16-bit integers and is likely to replace it entirely as hardware becomes fast enough to support it."
btw 32bit per channel is 96bit colour (supported by Photoshop CS2). These large colour pallets are only useful in processing (like in video games). Using more than 8bit per channel (24bit) colours in the actual display is unecassary.
"For extended dynamic range imaging, including high dynamic range imaging (HDRI), floating point numbers are used to describe numbers in excess of 'full' white and black. This allows an image to describe accurately the intensity of the sun and deep shadows in the same colour space. Various models are used to describe these ranges, many employing 32 bit accuracy per channel. A new format is the ILM "half" using 16-bit floating point numbers, it appears this is a much better use of 16 bits than using 16-bit integers and is likely to replace it entirely as hardware becomes fast enough to support it."
btw 32bit per channel is 96bit colour (supported by Photoshop CS2). These large colour pallets are only useful in processing (like in video games). Using more than 8bit per channel (24bit) colours in the actual display is unecassary.