源于这里对于MADVR做gamma转换的问题。
首先我做了MADVR排除其他选项(尤其是显示器选项)的调色问题。对视频源做了如下两次截图。(由于gamma只与luma有关)
avs 使用nnedi3_resize16
![图片](https://prtmwa.bay.livefilestore.com/y2paL89HjWCiNeLMDGRRT0DD9gLgs1FyA3mHeY-vcdiTvIGPoESSYLDNAQHsBY6Nv0rlc8wQBC4SvIvQERFpIyWE-oxLBcri2JFxP5FV5dy6RqTInI7GfPg4mFMBnIonQcJ/New%20File%20007192.png)
MADVR使用MPC-BE
![图片](https://prtmwa.bay.livefilestore.com/y2p3L8LrzrssvKoISlKNaRK351S-ZaTb08JFHCSrZy3zelmFasRjz7j91g-vQPnKhyk_oRH3yS0dDPHF1O6TtgXBK8iaPw4-G_1b69wMu1r0JZAsO7KaXZtuoI7ZCqWcBd0/New%20File%20007192%20v2.png)
之后是做200%放大,到1696x960之后的结果
首先是我认为可以作为参考标准的还原画质
nnedi3_resize16
![图片](https://prtmwa.bay.livefilestore.com/y2pYJkG67qF61eLzA8I1KfK_6kgRX1q59xCe7CZY-ZeVWw5HC0KtvErGeek9ZUwTFrxxs34V3NVmV-8a9zWtoczr1Ws6RTWI1EHMURAG4vcApHejp-4Gm7ZyHR1QRrTeFGt/New%20File%20%284%29007192.png)
MADVR linear light
![图片](https://prtmwa.bay.livefilestore.com/y2pzsH_PMR3SroFsfgyV1w02gjC7VA8xI4ZwuV14bFTqocOoOQ_zWN0uwv_aD4iMf3IJ0U9lGvDEwEIqEgJVaAhYA_gofsCivXkGU7qfMcq9yJ-SmI0nurq5GGFOxjaZpKR/QQ%E6%88%AA%E5%9B%BE20130812133818.png)
MADVR gamma-aware(CPU)
![图片](https://prtmwa.bay.livefilestore.com/y2p6qq4j1tdH-eVsez4K6heKWCuVhiRNPtu4JTmuxfMiotJXCtVlnfVHQ_TjqKVK-Ln9ekG8TqkR5wF63ShbR2-M4DdIJukVVVn3m_kZCcfeWU2Pi5YTzf-hOsVk2N3LXYH/QQ%E6%88%AA%E5%9B%BE20130811111619.png)
MADVR gamma-aware(GPU)
![图片](https://prtmwa.bay.livefilestore.com/y2pHQGTA9yJdBgZ6xL1s4UnpoZF6KGwCG2i2tyavYa8OCIjPVc98Ub5jM13feflQJMN5giJGso0G7RFn0jG69ykMDy-7MFRN4abNkHhq9Smggij_U5ljG9Ub0Amo4HRPuKf/QQ%E6%88%AA%E5%9B%BE20130812140318.png?psid=1)
可以确认是否使用GPU对于MADVR的结果几乎没有影响。
我来看看最后结果的区别吧:(使用imgdiff做差别区分)
linear light vs nnedi3_resize16
![图片](https://prtmwa.bay.livefilestore.com/y2pFJ77__HPrDRFWKdYRVcYax4P8ORB1ECOOVdconSH-r3jG83gWRwh9ibdJ04M4FErJ-0fKN51IbI3hKULfXkbm5tewbgmPoO1K2acCBXzG2QU29ao1F608O5iCQ5lUKXQ/diffimg1.png)
![图片](https://prtmwa.bay.livefilestore.com/y2pTUfH8ZNb_aGgWjPRCs30B0djIVaCwmtZfUN4sNeZgnSTDrqEOak8E3cEUMNRljVywxY0YQ31_FV58fmCePK19eICscemHHFaBjNzZx81Fz1NBa5p5y4w81wfaUMA995F/diffimg2.png)
gamma-aware vs nnedi3_resize16
![图片](https://prtmwa.bay.livefilestore.com/y2pcb9-vaP3fBlFh6GBHgBYWL_R7h4u31KCj1KUD7NaYfkqg8P0lpNmcBvDhX1UPus_fsxuDrOU3fCHnCqI-NDr0fE_YA1U4yStBmh5cYSHYaZC4RDRWoGqraCDbLsSplLZ/diffimg3.png)
![图片](https://prtmwa.bay.livefilestore.com/y2pJNZPzZvHe-9J1bSbDH5ypEIj0R4FTu9vQt-yS65GQYFKyjnKpL8dJN5LIQeJK6opIZYDImekHnurAPScZ9k5LUdrEntS7VjnGvLyHBTBQB-A5GTfwYItv4lzE08tpQpL/diffimg4.png)
结果统计
linear light vs nnedi3_resize16
![图片](https://prtmwa.bay.livefilestore.com/y2pBByeEneRMLPogrYY4zatvUQUC_Dv8Urxdez9lN5qB2Sli85cjumT1Yu6PXtNUuYWkg7i3ilJ-LnDPE68wMOYcNvT3Etf7R-MBXwqgz7VnPW3DETthpPYmewivolbEQrb/diffimg5.png)
gamma-aware vs nnedi3_resize16
![图片](https://prtmwa.bay.livefilestore.com/y2pGFfgbL9GqqlZq5Qoai0Y7zYuTiKXFE7fsx29xMuoISmuooZ2lEpy2HAfouXcXi0rPgDZ6t2M7b78CeY4VF0HLQAnOHytgERIEBorWq6nuXPMmADx2ghRfy46UID_RsY5/diffimg6.png)
结果显示的是linear light可以获得更加接近nnedi3_resize16的结果,无论是最大误差还是误差点数还是最后的平均值和标准差等等。gamma-aware的结果都更不解近nnedi3_resize16。
1.对画面对比度的失真会很明显,那如果说这个是正确的,那nnedi3_resize16中也没有加入任何和gamma有关的东西,但是它却是大家比较公认的最好的upconv滤镜(不仅仅是chroma upsmapling滤镜),是不是这个标准定义上有问题。
2.如果说nnedi3_resize16作为标准,那么gamma-aware后的结果反而更加不接近nnedi3_resize16的结果,相反linear light更加接近。那是不是可以说linear更好一些呢?
PS:我的MADVR设置