06-17-2011, 08:02 AM
[quote name='soLong' timestamp='1308296517' post='9308']
it seems to me that the adobe conversion from a wider colour space to a more compressed space just clips what is too much for the compressed space to handle - i certainly am not happy with that result - so yes if you want srgb maybe easiest to reduce the chroma to fit and then grade away in srgb until you're happy with the results -
for me, when i've saved a final tiff in prophoto or adobe rgb and then find clipping in the srgb conversion, i tweak levels(sometimes a lot via levels)until they fit in srgb and then untweak them(mostly via curves)in the new colour space, it's not hard and doesn't take long - the result is visually the same and possibly might work as an auto run -
and then there are some that say that visually it may all be not a bother - but i worry - i suspect you might lose detail -
so ... if someone has a simpler way to make the waveform look as good as the pic, please say ...
[/quote]
For the case of red flowers---whose color is dominated by red---it is indeed that some details are lost when much clipping happens and that is why I said the flowers look bad. When I tried to desatuate the red color of the flower, I often find that the flower does not look like what it should be, i.e. the flower does not look that red instead it looks somewhat yellow.
If I understand your second paragraph correctly, it is equivalent to the following operation: in the afterward processing of the raw file, try to reduce the exposure so that the right channel does not clip in sRGB; then brighten the image by adjusting the curve and keep the right boundary of the level curve fixed so that the red channel does not clip in sRGB. I did not try this approach so I do not know the effect.
Thanks,
Frank
it seems to me that the adobe conversion from a wider colour space to a more compressed space just clips what is too much for the compressed space to handle - i certainly am not happy with that result - so yes if you want srgb maybe easiest to reduce the chroma to fit and then grade away in srgb until you're happy with the results -
for me, when i've saved a final tiff in prophoto or adobe rgb and then find clipping in the srgb conversion, i tweak levels(sometimes a lot via levels)until they fit in srgb and then untweak them(mostly via curves)in the new colour space, it's not hard and doesn't take long - the result is visually the same and possibly might work as an auto run -
and then there are some that say that visually it may all be not a bother - but i worry - i suspect you might lose detail -
so ... if someone has a simpler way to make the waveform look as good as the pic, please say ...
[/quote]
For the case of red flowers---whose color is dominated by red---it is indeed that some details are lost when much clipping happens and that is why I said the flowers look bad. When I tried to desatuate the red color of the flower, I often find that the flower does not look like what it should be, i.e. the flower does not look that red instead it looks somewhat yellow.
If I understand your second paragraph correctly, it is equivalent to the following operation: in the afterward processing of the raw file, try to reduce the exposure so that the right channel does not clip in sRGB; then brighten the image by adjusting the curve and keep the right boundary of the level curve fixed so that the red channel does not clip in sRGB. I did not try this approach so I do not know the effect.
Thanks,
Frank