Dear list: I am trying to compare HDR images and simulated luminance maps. Since I use SIGMA 8mm 1:3.5 for Canon, I need to convert equisolid-angular to equiangular project. I see very useful information from the post below:
https://www.radiance-online.org:447/pipermail/radiance-general/2015-August/011184.html However, I still have some questions need to figure out. 1) pinterp does not include equisolid-angular projection, so a equation needs to be applied to the function. Greg mentioned this simple expression, sin(theta)/theta, but I am still confused. Could anyone offer me the command? 2) The post discussed the steps of processing HDR images. If I get it right, the steps following "adjust exposure" are vignetting correction, adding view information, converting project from equisolidangular to equiangular, then calibrating the image. I use a GOSSEN Starlite 2 to record the luminance value on a grey card for calibration. My question is, should I calibrate the image before or after converting fisheye projection? Any suggestions or explanation would be appreciated. Zhe
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