Downgrade in quality...is this due to lens profiling?

Trekz

Member Joined: Oct 16, 2016 00:32 Messages: 67 Offline

Solved by

Nov 04, 2016 11:00

Everyting besides the beginning was shot in 4k at 23.96fps with a DJI Phantom 3 Professional. After producing it on PD15, I noticed the quality was a little off compared to the footage that didn't have the lens correction. Midway in the video, there are little circular streaks around the bottom corners. It just doesn't seem that clean compared to the pre PD15 color graded footage. Since the lens profile only supports DJi osmo + DJi advanced, the osmo profile was chosen because it corrected the horizontal problem. Is the degration of quality due to this lens profile? I'm outputting it at 4k 23.96fps, so the quality is supposed to be the same as the color graded footage. Where do I even find a lens profile for the phantom 3 professional? The camera is an " FC300X " exactly. How do I get a cleaner video?

Edit: Check the bottom right area. It is subtle, but it is still there. How do I even get rid of that?

Please Help.

https://www.youtube.com/watch?v=CpI33142oRE

Comparison:

http://imgur.com/a/S7H1s

Edit 11/05/16 Comparison Video: Color Banding is due to the lens correction.

https://www.youtube.com/watch?v=4-rBnJU_gy4&feature=youtu.be

This message was edited 4 times. Last update was at Nov 05. 2016 16:25

PowerDirector Moderator

Senior Contributor Location: New Taipei City, Taiwan Joined: Oct 18, 2016 00:25 Messages: 2104 Offline

Nov 04, 2016 14:53

Quote ............................ Where do I even find a lens profile for the phantom 3 professional? The camera is an " FC300X " exactly. .................................

Can't help directly, but if you head over to the DZ there are lens profiles to download - unfortunately not specifically for the FC300X, only for the FC300S - but you could use the email box to ask for your specific profile??


Filename	DZ lens profile.PNG	Download
Description	Director Zone lens profiles for DJI
Filesize	205 Kbytes
Downloaded:	65 time(s)

This message was edited 5 times. Last update was at Nov 04. 2016 15:00

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ynotfish

Senior Contributor Location: N.S.W. Australia Joined: May 08, 2009 02:06 Messages: 9977 Offline

Nov 04, 2016 16:03

Hi Trekz -

I can help out a little here. PDR/DZ don't have specific lens profiles for the FC300X, but Photoshop does. There's no
obvious difference between the profiles, so using the DJI Phantom3 Advanced profile in PDR will provide the right correction.

The attached screenshots show a clip from DJI P3 Pro in Ps: 1. RAW 2. with FC300S appplied 3. with FC300X applied.

Cheers - Tony


Filename	DJI P3 RAW.png	Download
Description
Filesize	2774 Kbytes
Downloaded:	53 time(s)


Filename	DJI P3 FC300S.png	Download
Description
Filesize	2754 Kbytes
Downloaded:	56 time(s)


Filename	DJI P3 FC300X.png	Download
Description
Filesize	2745 Kbytes
Downloaded:	56 time(s)

This message was edited 2 times. Last update was at Nov 09. 2016 02:21

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Trekz

Member Joined: Oct 16, 2016 00:32 Messages: 67 Offline

Nov 05, 2016 01:30

Quote

Quote ............................ Where do I even find a lens profile for the phantom 3 professional? The camera is an " FC300X " exactly. .................................

Can't help directly, but if you head over to the DZ there are lens profiles to download - unfortunately not specifically for the FC300X, only for the FC300S - but you could use the email box to ask for your specific profile??

Thank you all.^ I already saw the s/x version, but when it came down to the videos, I preferred the DJi osmo lens profile since it straightened out my horizon better than the dji advance profile. One thing I noticed though is that there are some circular black silhouettes after the lens correction has been applied. Any idea as to how to remove this? EDIT: Please check this imgur link: http://imgur.com/a/S7H1s

This message was edited 2 times. Last update was at Nov 05. 2016 01:41

ynotfish

Senior Contributor Location: N.S.W. Australia Joined: May 08, 2009 02:06 Messages: 9977 Offline

Nov 05, 2016 05:45

Hi again Trekz -

A couple of things:

Your eyes must be way better than mine because I can't see the "circular black silhouettes", unless you mean the slight banding in the water below the surfer.

One screen shot is from Movies & TV (Win10) & the other is from YouTube. YouTube has obviously processed the video brighter than the original. That's going to have an impact.

If you could post screenshots from PDR or your media player that would be a more acurate comparison.

Cheers - Tony
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Trekz

Member Joined: Oct 16, 2016 00:32 Messages: 67 Offline

Nov 05, 2016 06:11

Quote Hi again Trekz -

A couple of things:

Your eyes must be way better than mine because I can't see the "circular black silhouettes", unless you mean the slight banding in the water below the surfer.

One screen shot is from Movies & TV (Win10) & the other is from YouTube. YouTube has obviously processed the video brighter than the original. That's going to have an impact.

If you could post screenshots from PDR or your media player that would be a more acurate comparison.

Cheers - Tony

Thank you for letting me know what I was looking for: color banding. I had no idea what that was, but I noticed these subtle "bands." Now I have to figure out how to correct that. Thanks. Now how do I remove the banding?

ynotfish

Senior Contributor Location: N.S.W. Australia Joined: May 08, 2009 02:06 Messages: 9977 Offline

Nov 05, 2016 15:13

Is the banding present in the produced file on your PC, or does is only show up when viewing on YouTube? As mentioned above, YouTube processing appears to have significantly altered the colours/white balance. At pixel level, it's as stark as this:

Could you please post screenshots from the same source i.e. PDR or media player?

Cheers - Tony
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Trekz

Member Joined: Oct 16, 2016 00:32 Messages: 67 Offline

Nov 05, 2016 16:22

Quote Is the banding present in the produced file on your PC, or does is only show up when viewing on YouTube? As mentioned above, YouTube processing appears to have significantly altered the colours/white balance. At pixel level, it's as stark as this:

Could you please post screenshots from the same source i.e. PDR or media player?

Cheers - Tony

First off thank you all again for taking the time to review over this problem. YouTube doesn't seem to be the problem here. Here is a side by side comparison. How do I get the correct lens correction without it tainting the video with color banding?

https://www.youtube.com/watch?v=4-rBnJU_gy4&feature=youtu.be

ynotfish

Senior Contributor Location: N.S.W. Australia Joined: May 08, 2009 02:06 Messages: 9977 Offline

Nov 06, 2016 00:32

Hi Trekz -

After running a number of tests with different DJI P3 clips, I can find no evidence that applying an appropriate lens profile has any detrimental imapact on image quality. No banding or noticeable issues.

You mentioned colour grading: Is the degration of quality due to this lens profile? I'm outputting it at 4k 23.96fps, so the quality is supposed to be the same as the color graded footage?

In the colour grading process, did you apply any LUTs? or were you referring to basic colour adjustment? What software was used? PDR? CDR? Other? I've seen banding artifacts when LUTs have been applied.

Is it possible for you to upload a short 5-10 sec sample clip from your P3? and describe what adjustments you made before doing lens correction?

Cheers - Tony
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Trekz

Member Joined: Oct 16, 2016 00:32 Messages: 67 Offline

Nov 06, 2016 01:45

Quote Hi Trekz -

After running a number of tests with different DJI P3 clips, I can find no evidence that applying an appropriate lens profile has any detrimental imapact on image quality. No banding or noticeable issues.

You mentioned colour grading: Is the degration of quality due to this lens profile? I'm outputting it at 4k 23.96fps, so the quality is supposed to be the same as the color graded footage?

In the colour grading process, did you apply any LUTs? or were you referring to basic colour adjustment? What software was used? PDR? CDR? Other? I've seen banding artifacts when LUTs have been applied.

Is it possible for you to upload a short 5-10 sec sample clip from your P3? and describe what adjustments you made before doing lens correction?

Cheers - Tony

I used Sony Catalyst Browse to color correct it. The lens correction absolutely affects it, so how do I repair that please?

In case you missed it, here is the comparison video: https://www.youtube.com/watch?v=4-rBnJU_gy4&feature=youtu.be

ynotfish

Senior Contributor Location: N.S.W. Australia Joined: May 08, 2009 02:06 Messages: 9977 Offline

Nov 06, 2016 01:55

"In case you missed it" I can find no evidence that applying a lens correction profile causes banding or other visual artifacts. My tests did NOT involve colour grading or other processing first. The clips used were straight off the camera.

My point was that the grading process combined with lens correction may have resulted in what you've got.

I doubt you can correct it now, but (for future reference) you might try: Lens correction followed by colour grading.

Cheers - Tony

This message was edited 1 time. Last update was at Nov 06. 2016 01:56

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Trekz

Member Joined: Oct 16, 2016 00:32 Messages: 67 Offline

Nov 06, 2016 02:40

Quote "In case you missed it" I can find no evidence that applying a lens correction profile causes banding or other visual artifacts. My tests did NOT involve colour grading or other processing first. The clips used were straight off the camera.

My point was that the grading process combined with lens correction may have resulted in what you've got.

I doubt you can correct it now, but (for future reference) you might try: Lens correction followed by colour grading.

Cheers - Tony

Thanks. It might have just been the color correction then.

Since we are arleady on the roll here for lens correction.....

If I'm not getting banding, I'm getting these white bleeding on the sides after applying it. You can check it here: https://www.youtube.com/watch?v=R_uMPedJO8U&feature=youtu.be .

...