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It is currently Thu Feb 21, 2019 7:33 am

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For answers to frequently asked questions and to contact us directly, please use our support page at https://luma-touch.com/support.

LumaFusion 1.7 is now available in the App Store. This update includes great new features like search and sort in the library, soft edges and curved corners in cropping, and our new integration with Storyblocks, a great royalty-free library of video, audio and sound effects. A sample of clips are included free, with a low-cost subscription available in-app for access to the full library


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PostPosted: Tue Jan 15, 2019 9:39 pm 
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Apprentice
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Joined: Mon Aug 28, 2017 9:21 pm
Posts: 97
I just recorded an event using a Panasonic GH4 where I had to turn the camera ISO up because of low lighting. I shot it in Vlog 4K because there was some undesirable backlight and I wanted to boost the shadows of the people in the foreground and tame some of the bright lighting behind them.

As you might expect, the color corrected and downrezzed video had a lot of noise in the brightened shadow areas. I wanted to see if I could correct this with the super noise reducing Neat Video plugin on my PC.

I started from scratch with the original video on the PC, applied the Vlog correction LUT, and corrected the shadows and highlights and did a dowrez render to 1080P. The render took way longer than a Luma Fusion render: about two days for about an hour of footage. Way longer than it had in Luma Fusion.

What completely surprised me when the PC render finished was that almost all of the high ISO noise was gone! This was without the Neat Video noise reduction! After a little investigation I know why:

Luma Fusion and Magix Vegas downrezzed differently. Luma Fusion was skipping pixels but Vegas was taking blocks of pixels and averaging them. On low noise footage, both downrezzed look about the same, but with low light noisy footage the noise reduction from sampling every pixel and averaging them in blocks looks orders of magnitude better.

Is it possible to incorporate this as an option in Luma Fusion? I wouldn’t want to always do it because it adds so much time to renders, but on occasions when you have high ISO 4K footage, averaging blocks of pixels instead of skipping them can work wonders. It is also useful with tight patterns in bricks, shingles and fabrics when you want to avoid moiré.


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