[hugin-ptx] Enfuse 4.1.1 CIECAM bug?
I've been trying to track down a problem with enblended images suffering a lack of contrast with respect to the remapped images. It seems that I am not the only one experiencing this problem and it is due to the CIECAM blending default option for input images with colour profiles. Example: http://www.flickr.com/photos/48606216@N00/10135641463/ The area shown is not in an overlapping region so no blending should occur. The input image looks exactly like the right hand side when CIECAM blending mode is turned off. The left shows a lightening of the shadows with the default options. Enblend 4.1.1 Windows 64-bit version from Sourceforge. Windows 7 64 bit 16GB RAM, i7 3770. Lightroom 4.4 and PWP 6.0.10 64 bit. Is the problem due to the forward and reverse mappings of the input colour space to CIECAM02 not being inverse? I would have expected that a non-overlapping region should be mapped in the output to exactly the same values as the input but this doesn't seem to be the case with the CIECAM blending mode. Daniel. -- A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ --- You received this message because you are subscribed to the Google Groups hugin and other free panoramic software group. To unsubscribe from this group and stop receiving emails from it, send an email to hugin-ptx+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/hugin-ptx/05709ecf-3aa7-431d-b092-41e5f9f0f416%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: [hugin-ptx] Enfuse 4.1.1 CIECAM bug?
On 7 October 2013 12:07, dkloi dkl...@googlemail.com wrote: Is the problem due to the forward and reverse mappings of the input colour space to CIECAM02 not being inverse? I would have expected that a non-overlapping region should be mapped in the output to exactly the same values as the input but this doesn't seem to be the case with the CIECAM blending mode. I don't have an explanation for the difference, but enblend _will_ alter values in non-overlapping areas - The width of the blend is determined by the number of blending levels, so if you want to rule out the blending itself as the source of the problem then you can temporarily set this to -l 1 -- Bruno -- A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ --- You received this message because you are subscribed to the Google Groups hugin and other free panoramic software group. To unsubscribe from this group and stop receiving emails from it, send an email to hugin-ptx+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/hugin-ptx/CAJV99ZgoFjNDUABODjWMYozvpB3bOaFoEBQqzcRWUmGi%2Btuduw%40mail.gmail.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: [hugin-ptx] Enfuse 4.1.1 CIECAM bug?
Thanks for the tip about the blending levels. However, even with only a single blending level I get the same lightening of the shadows with the default options. I found a previous post https://groups.google.com/d/msg/hugin-ptx/354rmYe12fA/4cLfTrny11kJ that indicates that the problem could lie with LCMS. Just noticed 4.1.2 on Sourceforge. Just tried it but it looks like it behaves the same as 4.1.1. On Monday, October 7, 2013 1:45:05 PM UTC+1, Bruno Postle wrote: On 7 October 2013 12:07, dkloi dkl...@googlemail.com javascript:wrote: Is the problem due to the forward and reverse mappings of the input colour space to CIECAM02 not being inverse? I would have expected that a non-overlapping region should be mapped in the output to exactly the same values as the input but this doesn't seem to be the case with the CIECAM blending mode. I don't have an explanation for the difference, but enblend _will_ alter values in non-overlapping areas - The width of the blend is determined by the number of blending levels, so if you want to rule out the blending itself as the source of the problem then you can temporarily set this to -l 1 -- Bruno -- A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ --- You received this message because you are subscribed to the Google Groups hugin and other free panoramic software group. To unsubscribe from this group and stop receiving emails from it, send an email to hugin-ptx+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/hugin-ptx/118b8c56-4a33-41fc-8d5c-72a44038b69b%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
