Line of color after using Chroma Key in PDR12

xexorweglin

Newbie Joined: Nov 22, 2015 01:44 Messages: 2 Offline

Solved by

May 13, 2016 02:31

I am using a square image (300x300), one half of which is the green of a green screen, the other half being white. The division between colors goes from the upper right to the lower left, so you have 2 triangles of color. After importing this into my PowerDirector 12 project, I place it on the timeline and click Modify while it's selected. In the PiP Designer window I go to the Chroma Key setting and click the eyedropper button. I then click on the white, so only the green remains. However, there is still a 1-pixel wide white line running down the right side of the image. No amount of tolerance variation will make this go away.

A designer friend of mine told me that this has been an issue with video software in general in the past, but one would think that by 2013 (when PowerDirector 12 was released) this would no longer be an issue, or at a minimum if there's actually some use for this (and it's not a bug) there would be an option to turn this "feature" off.

Has anyone found a way to overcome this issue? I've included the image as an attachment, in case anyone wanted to have that.

Filename	Diag-GrnScrn.png	Download
Description
Filesize	1 Kbytes
Downloaded:	27 time(s)

Xexor Weglin
https://www.youtube.com/user/xexorweglin

Nick

Newbie Joined: Oct 11, 2014 13:19 Messages: 7 Offline

May 13, 2016 05:47

I imported your file as a PNG and I utilized the Chroma Key setting for both the green and the white using PD 12 and experienced no issue. Perhaps you might think of putting a file on two different tracks with an overlap which may overcome your issue.

xexorweglin

Newbie Joined: Nov 22, 2015 01:44 Messages: 2 Offline

May 13, 2016 11:59

Sorry; I forgot to specify that the image was adjusted with "Maintain aspect ratio" unchecked. So, for example, I resized the image so the diagonal part would only cover a portion (like follow the slope of the top of someone's head). Here is a screenshot of a resulting frame, so you can clearly see the white lines that cover part of the face, by the right eye (on the left for us).

So here, the edge of the green triangle runs along the top left of the man's hat to cover a good portion of the background. (It extends a little above the visible video area; the white line is the right side of the image after the chroma key was applied to the white part. Clearly this is happening, at least for me.

I don't know how putting a file on two different tracks with an overlay would overcome this problem. Since the green is supposed to cover part of the video on the other track, what would I duplicate on a third track? Placing the video a second time would cover the green; placing the image a second time would only cover the image and not get rid of the white.


Filename	White-Line Example.jpg	Download
Description
Filesize	84 Kbytes
Downloaded:	20 time(s)

This message was edited 1 time. Last update was at May 13. 2016 12:05