oiiotool.exe C:\temp\ataafm_diff_v001.1005.tif -resize 120x120 -o c:/temp/test_oiio_tool.jpg
From: Larry Gritz <[email protected]> Sent: Friday, December 28, 2018 1:05 PM To: OpenImageIO developers <[email protected]>; Renaud Talon <[email protected]>; [email protected] Subject: Re: [Oiio-dev] Tiff image conversion to jpg color shift issue What oiiotool command line did you use when it worked as expected? On December 28, 2018 12:36:04 PM PST, Renaud Talon <[email protected]<mailto:[email protected]>> wrote: Hi Larry, I’m having a problem when making thumbnails from tiff images where the results image is coming out darker and less saturated than the source. When using oiiotool.exe it results in a proper output but the issue happens when I do the conversion myself from the python API. Any idea why this is happening ? Thanks ! Trimmed down code: from OpenImageIO import OpenImageIO as oiio from OpenImageIO.OpenImageIO import ImageBufAlgo, ImageBuf, ImageSpec, ImageInput sourceImgPath = "C:/temp/ataafm_diff_v001.1005.tif" sourceImg = ImageInput.open(sourceImgPath) spec = sourceImg.spec() pixels = sourceImg.read_image(0, 3, oiio.UINT8) sourceBufSpec = ImageSpec(spec.width, spec.height, 3, oiio.UINT8) sourceBuf = ImageBuf(sourceBufSpec) sourceBuf.set_pixels(oiio.ROI.All, pixels) resizedImgSpec = ImageSpec(int(120), int(120), 3, oiio.UINT8) resizedBuf = ImageBuf(resizedImgSpec) ImageBufAlgo.resample(resizedBuf, sourceBuf) # Set input colorspace to linear if converting EXR file if sourceImgPath.split('.')[-1] == 'exr': ImageBufAlgo.colorconvert(resizedBuf, resizedBuf, 'linear', 'sRGB') resizedBuf.write('C:/temp/test_oiio.jpg') [cid:[email protected]] Renaud -- Larry Gritz [email protected]<mailto:[email protected]>
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