get the HDR image in .hdr or .exr format

[Yliu724]

Thanks for your impressive work!

I have read your code and generate some results using the test.py file. It seems that the reconstructed hdr image is saved as uint16 png format, and in the tonemapped_visualization.py, the hdr image is tone mapped to LDR image for visualization. Am I right? And I also try to directly save the sr_img to .hdr or .exr format using the following code: cv2.imwrite('hdr_img_path.hdr', sr_img) The result seems good. Can I do so to get the HDR image in .hdr or .exr format instead of uint16 png format?

Thank you~

[chxy95]

@Yliu724 It's OK to do so, but it is better to perform gamma inversion to obtain linear image before saving in a .hdr or .exr format.

[Yliu724]

Get it. Thanks for your reply.

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发件人: XyChen @.> 发送时间: 2021年8月22日 22:45 收件人: chxy95/HDRUNet @.> 抄送: LIU Yue @.>; Mention @.> 主题: Re: [chxy95/HDRUNet] get the HDR image in .hdr or .exr format (#14)

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@Yliu724https://github.com/Yliu724 It's OK to do so, but it is better to perform gamma inversion to obtain linear image before saving in a .hdr or .exr format.

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[sunyclj]

@chxy95 please, what operation gamma inversion is? thanks.

[chxy95]

@sunyclj you can refer to this page for an approximate inversion of gamma correction. https://forum.image.sc/t/how-to-reverse-gamma-correction-from-a-image/9430