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photoshop config.ocio
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Nishith Singhai <singha...@...>
thank you so far. I have installed fedora on virtualbox. Now come to need config.ocio for making icc for photoshop
ocio2icc does not work on it but i gues ociobakelut can give icc. So, downloading sample config files from http://opencolorio.org/downloads.html, give for nuke and spi. Does photoshop need a specific config.ocio or will any of the downloaded will do. |
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Nishith Singhai <singha...@...>
Hi,
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1) By thumb rule a lg10 to srgb8 in nuke and lg10 to srgb8 in after effects should give the same result. true or false. 2) what is the way to measure that output from nuke after applying lut is looking same as that of after effects. is there a measuring tool or is it based on the observation only. I have a case where nuke output and after effect output although applying same ocio setting gives different look. What could I be missing. On Friday, December 21, 2012 8:30:27 PM UTC+5:30, Nishith Singhai wrote: thank you so far. I have installed fedora on virtualbox. Now come to need config.ocio for making icc for photoshop |
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Andrew Britton <andrew.d...@...>
I have found that photoshop doesn't need a specific ocio.config. Just create the ICC you need and it should load. A few people on here have commented that ICC profiles work best for integer type color bit depths. And yes, ocio2icc has been folded into ociobakelut; that will create all the ICC profiles you need. On Dec 21, 2012, at 8:00 AM, Nishith Singhai <singha...@...> wrote:
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Andrew Britton <andrew.d...@...>
One thing to check is that both the Nuke flow and photoshop color settings are using the same gamma curve and color gamut (i.e. make sure they're both in the same color space first). If you're working 'scene linear' in Nuke but not in Photoshop then I can easy imagine troubles will ensue. Good luck! On Dec 25, 2012, at 2:13 AM, Nishith Singhai <singha...@...> wrote:
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Brendan Bolles <bre...@...>
On Dec 25, 2012, at 1:13 AM, Nishith Singhai wrote:
1) By thumb rule a lg10 to srgb8 in nuke and lg10 to srgb8 in after effects should give the same result. true or false. Nuke and After Effects have different color space defaults, so it's very easy to import the same file into each and get different results with OpenColorIO. In fact, to get the programs to match up you need a good understanding of how each works. I wish it were simpler. A good thing to do is get an image with an area you can easily sample with your mouse (like the Marci image) and check to make sure the values match in each program. Both programs will show a readout of the pixel value you hover over (in After Effects it's in the Info palette). Nuke defaults to linear color space and automatically converts most file formats to linear unless you check the "Raw Data" checkbox in the Read node. If you're using OCIO to do color conversions, you'll probably want to check that box in every case. Cineon/DPX files will default to log, EXR to linear, and most others to sRGB. After Effects, on the other hand, defaults to no color space, which basically means your monitor's color space, or sRGB. The one exception is EXR files, which will get converted from linear to sRGB with the default setup unless you check "Preserve RGB". There's more information about this in the PDF manual included with the After Effects plug-in. If you're still having trouble, let me ask: which kind of file are you importing? Brendan |
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dbr/Ben <dbr....@...>
On 25/12/2012, at 7:43 PM, Nishith Singhai wrote:
2) what is the way to measure that output from nuke after applying lut is looking same as that of after effects. is there a measuring tool or is it based on the observation only.I found the most effective way is to run both applications on the same machine. Load the same image, and compare the two by toggling between each application (alt+tab or cmd+tab) It's easy to align the images (with a bit of panning and zooming), so you can get a good A/B comparison between the applications. If you can't run the two applications on the same host, connecting the two machines to the same monitor is the next best thing (but switching can take a few seconds, which makes a comparison hard). Failing that, you could try screenshoting both applications, or something like the "DigitalColor Meter" app on OS X, but these both introduce more steps that can go wrong As Brendan said, the most likely culprit is the applications interpreting the source footage differently.. A 16-bit TIFF version of a test image (e.g Marcie!) is usually a good place to start, as most applications tend to load them without any unexpected conversions Start of by checking the "raw" image is displayed the same in both applications, disabling any custom viewer-LUT's. When that matches, compare the LUT's. |
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Joe <joseph...@...>
Nishith,
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sicne you are testing the screen output you can sample the color from the display. on kde looking linux you can use kcolorpicker on the mac you can use DigitalColor Meter (in application utilities) Color sync on the mac is very, or was very difficult to null out. You may wind up with differences in Photoshop and After Effects based on your display profile -Joseph On Tuesday, December 25, 2012 1:13:38 AM UTC-8, Nishith Singhai wrote: Hi, |
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