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?說明：原始圖像（Raytracing的直接輸出結(jié)果，每一幅的左圖）為PPM格式，

一、OIDN

按照官方文檔提示，先用ImageMagick轉(zhuǎn)換成pfm格式，再將其作為oidn的輸入，輸出亦為pfm。

magick convert inOneWeekend.ppm -endian LSB PFM:inOneWeekend.pfm

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K:\progworks\raytracing\intel\oneapi\samples\04_oidn_gsg\build\ Release>.\oidnDenoise.exe -hdr inOneWeekend.pfm -o denoise.pfm

輸出結(jié)果為每一幅的右下圖。

二、Optix

Optix 不支持ppm作為輸入，

pfm作為輸入時(shí)：

會(huì)提示有通道信息缺失，轉(zhuǎn)換可能會(huì)有損失。

K:\progworks\raytracing\intel\oneapi\samples\04_oidn_gsg\build\Release>imgtool denoise-optix inOneWeekend.pfm --outfile inOneWeekend_denoise_optix.exr Warning: inOneWeekend.pfm: image doesn't have Albedo.{R,G,B} channels. Denoising quality may suffer. Warning: inOneWeekend.pfm: image doesn't have Nsx, Nsy, Nsz channels. Denoising quality may suffer.

后又嘗試先轉(zhuǎn)為exr格式?，

https://convertio.co/zh/ppm-exr/

再進(jìn)行降噪，輸出為exr格式。

會(huì)出現(xiàn)同樣的提示：

K:\progworks\raytracing\intel\oneapi\samples\04_oidn_gsg\build\Release>imgtool denoise-optix inOneWeekend_convertio.co.exr --outfile inOneWeekend_denoise_optix2.exr Warning: inOneWeekend_convertio.co.exr: image doesn't have Albedo.{R,G,B} channels. Denoising quality may suffer. Warning: inOneWeekend_convertio.co.exr: image doesn't have Nsx, Nsy, Nsz channels. Denoising quality may suffer.

輸出結(jié)果為每一幅的右上圖。

參考鏈接：

Build and Run Sample Projects Using the Visual Studio* Command Line...


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GitHub - mmp/pbrt-v4: Source code to pbrt, the ray tracer described in the forthcoming 4th edition of the "Physically Based Rendering: From Theory to Implementation" book.

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