Re: OT: 16 bit editing myth or reality?
When you use 8-bit instead of 16-bit you will get posterization (or posterisation).Look at Internet (e.g.: www.cambridgeincolour.com/tutorials/posterization.htm) or via Google and you will find a lot of answers about this phenomenon.Conclusion :work with 16-bit.
Don Bryant schreef:
Yves,Conclusion: Though I started with random numbers which mean the data is not a real image, I took great care to use numbers that would be representative ofareal world B&W image. Also the curve I use may not be representative ofanactual transformation one would use on a real image but it is actuallyaninverse gamma transformation and this type of transform is usedpracticallyall the time in color managed environment. I think we can say that boththedata and the curve are representative of actual editing that could bedoneon real world images though this particular data set is similar to a B&W image and it may not be the same with a color image. I think we can safely say that this particular editing simulation showsthatwe would benefit from working in 16 bit mode. But I remind you that other types of editing may or may not allow us tocometo the same conclusion.If I understand your post correctly you didn't actually edit an image in any type of image editing software. That being the case how can we draw any conclusions relative to real world image editing based on your simulation? Or to put it another way, how do you know what an image editing program does to real image data and thus how can you arrive at that conclusion with any reliability? I think the most useful way to approach this problem is to use real data in real software and examine the results, either visually or numerically. Don Bryant