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isp:vibrancy [2023/09/05 05:46] – [Vibrancy] Igor Yefmovisp:vibrancy [2023/09/05 05:47] – [Possible optimization] Igor Yefmov
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 ===== Possible optimization ===== ===== Possible optimization =====
  
-(This is valid for CPU-type architecture and is not very applicable to FPGAs where general memory is a big limiting factor)+(This is valid for CPU-type architecture and is not very applicable to FPGAs where general purpose RAM is a big limiting factor)
  
 There are over 8 million pixels in a 4K image and only 65K (256*256) possible transformations to either ''U'' or ''V'' component of the YUV triplet so it makes sense to pre-calculate those transformations and use the result as a LUT (provided it is faster to index the memory than to re-calculate the value, of course). There are over 8 million pixels in a 4K image and only 65K (256*256) possible transformations to either ''U'' or ''V'' component of the YUV triplet so it makes sense to pre-calculate those transformations and use the result as a LUT (provided it is faster to index the memory than to re-calculate the value, of course).

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