topic Re: c100 has too much green in the video, doesn't disappear when adding magenta in Professional Video

c100 has too much green in the video, doesnt disappear when adding magenta

JerTob — Mon, 01 Apr 2013 20:42:34 GMT

So last night I was just doing some testing with the c100 and I noticed that in the viewfinder after auto white balancing, there ws a bit too much green in spots where there relly shouldnt be. I took some video and wanted to see if this was just something in the LCD screen or the actual video, and the green cast was indeed in the video. I went into the color profiles and tried adding magenta but it actually did nothing to reduce the green in the areas I was seeing it in and only made everything else more magenta.

I'm just wondering if this is a known issue or if anyone has experienced this and if there;s any real fixes.

c100 white balance is always a bit too blue

JerTob — Mon, 01 Apr 2013 20:46:08 GMT

I noticed that it seems the c100 WB isnt really accurate and seems to adjust too much towards the blue side. tests I've done show that it can be off almost 1000 K.

Also, why is it that that the way the c100 gauges kelvin is completely backwards? If I raise K, it should turn more blue, correct? Blue is hotter. So why then does the camera add more red the higher in kelvin you go?

Re: c100 has too much green in the video, doesnt disappear when adding magenta

Mykolas — Wed, 03 Apr 2013 15:07:39 GMT

Hi JerTob,

Thank you for posting about this.

What you are seeing when you adjust the color temperature is correct. Higher Kelvin is for cooler lighting, while lower Kelvin is for warmer lighting. The camera will not make the image cooler when you raise the Kelvin setting. It is compensating for the cooler lighting temperature. By setting a higher Kelvin, you are telling the camera that you have cooler lighting, not telling the camera to make the image cooler.

What other color matrix settings have you changed to get the image to appear less green in certain areas?

If this is a time sensitive-matter, additional support options are available at Contact Us.

Re: c100 has too much green in the video, doesnt disappear when adding magenta

JerTob — Thu, 04 Apr 2013 02:46:28 GMT

Hi Mike, Thanks for explaining the white balance.

As for the green color cats, I was basically tweaking the color profiles with added magenta instead of green and the green would not come out of the picture, yet it still made midtones and such magenta. Attached is a pic showing what I mean. You can see in the upper right area on the floor by the couch that the area on the floor in that section has a green cast to it. Also in the lower left by the dresser, it seems the shadow on the ground ius a bit green and there is some green on the metal. Mind you there is nothing in that other room that is in any way green. in fact the walls in that room beyond are the same shade of off white you see in the foreground and they appeared VERY green (I dont have that video)

Re: c100 has too much green in the video, doesn't disappear when adding magenta

Tim — Mon, 08 Apr 2013 21:26:28 GMT

Hi JerTob,

We are sorry to hear that you are still having issues with the color casts. I suspect that this has a lot to do with the color temperature of the lighting that you are shooting in. What you have shown us is indoors, it's hard to make a distinct determination on the lighting because you could have any number of temperature bulbs in the mix. This type of mixture of lighting can have distinct effects on the color casts you see in the final image. This is especially true if shooting with household bulbs in an overhead or something to that effect.

What I would suggest would be to shoot outdoors, with the camera calibrated for such, and see if the same effect occurs. Lighting indoors can be very tricky and most videographers shooting in a professional environment use specialized lighting to correct for such casts and work with a colorist in post production to correct for exacting color.

Re: c100 has too much green in the video, doesn't disappear when adding magenta

a33333 — Sat, 16 Nov 2013 16:04:22 GMT

too many green inside
This is a very serious problem
Whether indoors or outdoors
I can only use the "auto white balance" Others are greenish

Re: c100 has too much green in the video, doesn't disappear when adding magenta

drew_bernard — Fri, 28 Feb 2014 19:43:38 GMT

New to the forums. Did you ever figure out what is causing the green cast when using custom white balance? I have this exact same issue. Even though it's the same Kelvin number, switching from auto to custom results in a greenish tint.

Re: c100 has too much green in the video, doesn't disappear when adding magenta

JerTob — Sat, 01 Mar 2014 00:34:37 GMT

No i haven't drew. I don't own the camera, my business partner does, so i haven't had time to really mess with it. . Recently though we have been noticing that there' no way we can match in camera the color balance between teh c100 and the 60d we own. Setting them at the same kelvin never results in the same look. The last event we shot showd the c100 much heavier in the yellow end than it should have. People's faces in the 60d looked mroe red and natural while in the c100 they looked lkike they wer wearing a thin coating of mustard.

Re: c100 has too much green in the video, doesn't disappear when adding magenta

abrichfilms — Thu, 27 Mar 2014 04:10:20 GMT

Hi a33333

Did you ever find a fix for this....it is happing on my c100 also....here is a short video with 2800K on Auto and then 2800K on custom.

https://vimeo.com/90188793

Brad

Re: c100 has too much green in the video, doesn't disappear when adding magenta

Jessica — Fri, 28 Mar 2014 17:52:52 GMT

Hi Everyone!

In order to properly address your questions regarding the color abberations in your individual videos, we'd need to know the specifics of your set up, and attempt multiple walkthrough tests to determine exactly where the problem with the lighing sensitivity lies.

The Canon Forum is not designed for this kind of specialized support, and your issues would benefit most from a customized one-on-one tech experience. Please get in touch with us HERE and we'd be happy to get you up and filming again!

Afterwards, if you’d like to report back with your experience for the good of the community, feel free to do so!

Re: c100 has too much green in the video, doesn't disappear when adding magenta

Mase2107 — Fri, 28 Mar 2014 17:07:29 GMT

I'm assuming "HERE" was suppose to be hyper-linked. I'm having the same issue and would like to figure it out. Where could we get one-on-one tech support?

Re: c100 has too much green in the video, doesn't disappear when adding magenta

Jason — Fri, 28 Mar 2014 17:52:26 GMT

Hi everyone, feel free to click on the following "Contact Us" link for support: Contact Us

Thanks!

Re: c100 has too much green in the video, doesnt disappear when adding magenta

cinema622 — Wed, 16 Apr 2014 21:27:18 GMT

if you're using the wide dr picture profile or any other ,just unprotect it if it has a lock then go into the white balance setting inside the picture profile and adjust it. worked wonders for me. no more green tint to the picture. its located in page 98 of the user manual.

Re: c100 has too much green in the video, doesnt disappear when adding magenta

jgharding — Wed, 21 May 2014 14:00:21 GMT

Agreed, I dial it out in Custom Profile.

Auto WB adjusts along the red blu and green magenta scales automatically.

Custom white balance only adjusts along red blue.

You can press for a single auto, then adjust your red blue, that'll auto set the g/M adjustment.

Otherwise you must adjust your magenta/green manually yourself in picture styles.

Canon could improve this by allowing adjustment of both kelvin settin and G/M tint manually under the custom setting.

until this firmware improvement is made, you must adjust manually as mentioned I'm afraid.

Re: c100 has too much green in the video, doesn't disappear when adding magenta

cfrandell — Wed, 20 Apr 2016 16:06:20 GMT

I have exactly this problem as well. Have you fixed this?

I just updated my firmware and reset all settings and have still this issue..

Re: c100 has too much green in the video, doesn't disappear when adding magenta

LarryCook — Sat, 19 Nov 2016 05:06:35 GMT

I'm having the same problem. I can only assume that some of the cameras ship this way. I have tried various ways to correct the green, including all of the white balance option, various exposures, and changing the camera profiles. Nothing fixes the green cast. I've seen elswhere people saying to change the color matrix - but, we shouldn't have to do that: the camera should ship with a neutral and properly color balanced matrix where all colors are accurate. I'm very disappointed and will be contacting Canon and requesting that 1) they fix my camera, 2) replace my camera, or 3) give me my money back. I never had these issues with my Sony or Panasonic. Hoping they can create a fast fix for me.

Re: c100 has too much green in the video, doesn't disappear when adding magenta

LarryCook — Sat, 19 Nov 2016 22:51:06 GMT

Did you ever fix your green problem? I am having the same issue. Were you shooting with Kino or other pro fluorescent lighting?

Re: c100 has too much green in the video, doesn't disappear when adding magenta

LarryCook — Mon, 28 Nov 2016 03:06:58 GMT

UPDATE: I took the camera to the Canon repair facility in Hollywood, CA. The tech there confirmed that there is too much green in C-log mode, and made adjustments. However, after I got the camera returned I ran another test and I see that there is still green in the image, though, much less. I think the problem at the repair facility is that the tech only used a monitor to view the camera image in the C-log format. If you have a C100 then you know that in C-log the image is washed out and low contrast, for the most part. When I put the footage into an editor and only adjusted contrast, blacks, whites and exposure (e.g., did nothing to color), there was still green in the image (most obvious in the darker parts of the footage).

Since I purchased the camera from B&H, I'll be exchanging it for another camera.

On another note, I told the rep at Canon that this problem has been mentioned in several online forums and he was not aware of that. If your C100 is shoting green in C-log, let Canon know!