Doom9's Forum - View Single Post - Possible to use avisynth to eliminate dead pixels on video?

kassandro · 17th August 2005, 07:07

You can download the RemoveDeadPixels plugin from here. It can be used as follows:

Code:

RemoveDeadPixels(clip input, int x, int y, int "select", int ycolor, int vcolor, int ucolor)

.
The first three variables are mandatory and self explanatory. With "select" you what you want to interpolate. 1 = interploate Y value, 2 = interploate U value, 4 = interploate V value. If you want to interpolate all, then choose select = 1 + 2 + 4 = 7. If ycolor >= 0 then RemoveDeadPixels creates a dead pixel at the specified location. I needed this option for testing and you can use it for locating a dead pixel ycolor=0 creates a dead black pixel and ycolor=255 creates a dead white pixel.
Because YUY2 is the native color space of DV and digicam clips, the plugin is for YUY2 only. When I have time, I extend the plugin to handle several dead pixels in one stroke.
Here is an example script:

Code:

avisource("my_yuy2.avi", pixel_type="yuy2")
RemoveDeadPixels(100, 200, 7, 230) # creat a dead pixel
RemoveDeadPixels(100, 200, 7) # and remove it

Instead of simple averaging RemoveDeadPixels inspects all four lines through a pixel and selects that line for interpolation, where the distance between the two neighbours is minimal.

Due to conflicts with one moderator, I no more support my plugins within the doom9 forum. If you want support, go to my free speech support forum (you find a link on the RemoveGrain/RemoveDirt web sites).

17th August 2005, 07:07	#11 \| Link
kassandro Registered User Join Date: May 2003 Location: Germany Posts: 502	RemoveDeadPixels You can download the RemoveDeadPixels plugin from here. It can be used as follows: Code: RemoveDeadPixels(clip input, int x, int y, int "select", int ycolor, int vcolor, int ucolor) . The first three variables are mandatory and self explanatory. With "select" you what you want to interpolate. 1 = interploate Y value, 2 = interploate U value, 4 = interploate V value. If you want to interpolate all, then choose select = 1 + 2 + 4 = 7. If ycolor >= 0 then RemoveDeadPixels creates a dead pixel at the specified location. I needed this option for testing and you can use it for locating a dead pixel ycolor=0 creates a dead black pixel and ycolor=255 creates a dead white pixel. Because YUY2 is the native color space of DV and digicam clips, the plugin is for YUY2 only. When I have time, I extend the plugin to handle several dead pixels in one stroke. Here is an example script: Code: avisource("my_yuy2.avi", pixel_type="yuy2") RemoveDeadPixels(100, 200, 7, 230) # creat a dead pixel RemoveDeadPixels(100, 200, 7) # and remove it Instead of simple averaging RemoveDeadPixels inspects all four lines through a pixel and selects that line for interpolation, where the distance between the two neighbours is minimal. Due to conflicts with one moderator, I no more support my plugins within the doom9 forum. If you want support, go to my free speech support forum (you find a link on the RemoveGrain/RemoveDirt web sites).