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Messages - 70MM13

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526
here's an excellent example of the benefits of amplifier gain optimisation:

the two images are frame grabs from MLV video.  no noise reduction applied.

one is using "straight" iso 200, while the other is using 200 dropped to 100 in the usual manner.

check out the difference in the chroma noise on the pant legs and the jacket sleeve.  there's none in the optimised shot!

this REALLY needs to become mainstream.

now.

please!





527
Wow, the "denoisaicing" from that linked paper is quite incredible.  The example image of the zebras is phenomenal.

If you guys can utilise that method, mlv app would be other worldly in its greatness!

Please try!!!

528
Raw Video Postprocessing / Re: Question regarding ML RAW > ACES
« on: March 28, 2018, 12:09:20 AM »
I'm really impressed with what you guys are creating here.

I hope you merge that branch soon, I can't wait to use it!

Keep it up, it would be incredible to one day be able to do colour accurate grading right from the mlv!

Highlight control too, please...

Thanks for your efforts!

529
Reverse Engineering / Re: CMOS/ADTG/Digic register investigation on ISO
« on: February 13, 2018, 08:59:34 PM »




Here's a photo I snapped using the technique I listed above, base iso 320, resulting "iso" 160.

Extreme dynamic range in the scene, full sun and shade in snow, sunlight reflected in the ice...

No postprocessing except for a nice fujifilm lut for my taste.

This amplifier hacking is incredible.

530
Reverse Engineering / Re: CMOS/ADTG/Digic register investigation on ISO
« on: February 12, 2018, 03:22:04 PM »
Regarding the video, I didn't use "iso" 109, but more like 80-320, based on isos 160-640.

I don't have a clue as to what the resulting isos really are, I just go by what magic lantern tells me.

I found that using actual iso 320-400 as the base gives the best results for my video work, particularly for very low light conditions.

I have a very simple method based on my own experiments following a quick reading of a1ex's information contained within this thread:

1: clear the custom iso settings
2: set desired base iso (canon menu)
3: take a silent photo
4: "copy canon settings"
5: set 0xfe to 3, preamp to 2, and reduce adtg until the "iso" is half of the base value

That's it!

I'm sure that better results are obtainable, but I'm very happy with what I'm producing using this simple method!

I've filmed a lot of scenes using this method, and it always works well for me.  I'd be overjoyed to have a simple menu option for this setting!

It's not a huge hassle to do manually, just a bit of a time waster.

Thanks a1ex and everyone for the magic of magic lantern!

I'm looking forward to seeing what's possible when we really nail down the best settings!

Edit: added missing step 4

531
Reverse Engineering / Re: CMOS/ADTG/Digic register investigation on ISO
« on: February 12, 2018, 02:37:09 AM »
Yes, it works extremely well!
I shared a music video I shot using this mode on the "share your videos" forum.  Check it out!
This experimental iso mode is long overdue for serious attention...

532
Share Your Videos / Music video shot with the ISO experiment
« on: January 17, 2018, 04:43:32 PM »
I'm loving the results of using optimised amplifier settings!

Check it out:


533
Feature Requests / Audio-only proxy?
« on: January 05, 2018, 03:09:25 PM »
Since I started tinkering with a1ex's iso experiment, I'm totally hooked.  I never shoot without it!

There's a drawback, however...

In it's current experimental state, it prevents recording camera audio in any of the >1920 zoom modes.  Can't make use of any of the workarounds available.

A thought occurred to me when I saw the message on the camera screen saying that no h.264 proxy recording is available in zoom mode:

Can an "audio-only" proxy be recorded?  Even if it includes totally corrupted video, the audio would be the important part.

Sorry if it's already been requested, it seems like an obvious idea, but a search turned up nothing for me.

534
Reverse Engineering / Re: CMOS/ADTG/Digic register investigation on ISO
« on: December 09, 2017, 06:26:42 PM »
ISO 109 tested for shadow noise improvement:

Three images, all settings identical except iso.  Exposed for highlights in a low light scene to really showcase shadow noise.  This time I adjusted register settings to compensate for highlights (as I should have before, but was too eager just to see results!)

No image processing except exposure compensation.  No noise reduction at all.

109 rocks.

5D3 1.13






535
Here's a couple of frames extracted from test shots of iso 53 vs 100...

I did nothing to avoid pink highlights, simply reducing analog gain to look for noise improvement, and got a good result!

Both recordings are using identical conditions and camera settings, one with iso regs enabled, the other disabled.  Exposure was adjusted in post to match.

These images have NO noise reduction of any kind. I raised the raw white level in rawtherapee to reduce the pink highlights but only a quick adjustment to make it less distracting.

I'll be using this!




536
Raw Video Postprocessing / Re: Informative shimmering in dual ISO?
« on: December 06, 2017, 11:45:29 PM »
OK, here's the results of a very unscientific first attempt to play with the registers:

Both are frame grabs from the corresponding mlvs, all camera settings identical except the "iso".

The images are taken from rawtherapee, with only debayering and chroma noise reduction applied.  Luma is untouched.

Note that although the highlights are pinkish, there is more highlight detail in the iso68 shot, particularly the threads on the light bulb socket!

Also note that although fewer photons were gathered, there's definitely a bit less noise in the shadows. Look closely at the inner edge of the speaker cone just outside the dual concentric HF driver.

Not a huge difference, but ANY improvement is worthwhile!

I'll keep happily experimenting...







537
Raw Video Postprocessing / Re: Informative shimmering in dual ISO?
« on: December 06, 2017, 08:40:01 PM »
Thanks again!
I'll be quite busy playing with all of this.
I'm tempted to set aside my dual iso shots and start playing with iso66!
I'll definitely share the results.

Regarding the dng padding, an alternative solution for the rawtherapee problem could be to convert the dngs to cr2s, if it's possible?

I'm looking for the least troublesome workaround to a problem that shouldn't exist...

Thanks again for your replies!

538
Raw Video Postprocessing / Re: Informative shimmering in dual ISO?
« on: December 06, 2017, 08:11:08 PM »
Fantastic, thank you!
I'll start playing with it as soon as I'm done installing octave and applying your fix to the affected shot.

One more question for you:

Is it possible to artificially enlarge the dng files by 4 sensels on each image boundary?

The reason I ask is because I'm very comfortable with doing post using rawtherapee, and it is hopelessly truncating dng files by that amount.  I've raised the issue with them and it seems that it will not be resolved.

I'm a fan of 1080 raw with 3*3 binning, and unless I'm mistaken there's no way to increase the recording resolution in that mode, particularly since I'm doing h264 proxies and want the proxy and raw to be identical resolution...

Any advice would be greatly appreciated!

539
Raw Video Postprocessing / Re: Informative shimmering in dual ISO?
« on: December 06, 2017, 06:49:24 PM »
Thanks to both of you for the replies!

I'm looking forward to playing with the script you will provide. Hopefully it rescues this otherwise excellent shot!

While I have your attention, please accept my humble request to continue with the "low" ISO experiment. Anything to help clean up shadows is VERY eagerly desired!

I'm sure that I'm not the only artist who's wishing for it.  I'll help with real world testing as much as possible but I cannot delve into compiling and all that.  Give me a build and I'll torture test it!

Thank you!

540
Raw Video Postprocessing / Informative shimmering in dual ISO?
« on: December 06, 2017, 01:08:12 PM »
Hi everyone...

I've got some interesting footage I shot the other day for a new film I'm creating.  I'm really digging the benefits of dual iso, but sometimes strange things can happen.  In this example, it seems as though the interlacing is alternating in the brightly lit patch of clouds above the sun.

Luckily, I'm shooting each clip in both single and dual iso modes in case of such things, but I want to share this example in case it's unusual enough to hint at something to investigate.

Shot on my 5Diii, firmware 113 using the latest nightly build.

The frames were extracted using the very new build of mlv_dump.

Every combination of ways to play with the frames on my windose machine has been tested, and the shimmering is always there.

It may be quite normal to you, but somehow it seems a little odd to me!

I'd upload the mlv but it's far too large, so this handful of frames should suffice...

Thanks for this incredible enhancement to so many photographer's lives!

https://drive.google.com/file/d/17jD44hIJQLsAtkrtyInK1_Xa3f2vae31/view?usp=sharing

541
Moved to own thread...

542
Raw Video Postprocessing / Re: Free Ektar 100 LUT for Magic Lantern footage
« on: November 26, 2017, 04:16:41 PM »
This looks fantastic!
Please port it to resolve!
Thanks!

543
I have nothing valuable to add I just wanted you to know I get so excited when there's a new reply in this thread.

Agreed!

544
Raw Video / Re: Shooting raw monochrome?
« on: November 06, 2017, 05:23:12 AM »
Nice.
Thanks for the tip.

545
Raw Video / Re: Shooting raw monochrome?
« on: November 06, 2017, 01:15:43 AM »
Right.

Thanks for the reply.

546
Raw Video / Shooting raw monochrome?
« on: November 04, 2017, 09:32:06 PM »
Hi all,
I'm curious if there would be any way to set ML to shoot raw video in monochrome, potentially to reduce the amount of data being recorded.
I have no idea if it's possible to do this at the lowest level, and even if so, would it actually reduce the amount of data?
Obviously, I'm interested in shooting monochrome.
Thanks.

547
Hello, I joined just to post this encouragement for you to pursue this for 550D...
I'd LOVE to be able to use my 550D as a b-camera for filming 10 bit 24P raw 1080p!!!

Please be assured that your efforts will be appreciated and will keep many good cameras working for years to come!

I'm starting a new film this fall, and this would be excellent!

Please make it happen!
Thanks.

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