TCNAmpAdjust plugin for Avisynth 2.5 version, is free and the author does not give any guarentee for its operation. It may be downloaded and used at the users risk.
This plugin was developed for a specific problem a user was experiencing with his Telecined frames. It appears that his frames were having a trapezoidal distortion and in addition having the blacks not really black. However due to trapezoidal distortion some part of the top or bottom have values which should correspond to real blacks. This plugin using this to an advantage finds the correction required to bring back true blacks.
user can control the width and height of the rectangluar areas that will be examined for deriving the correction as well as opt for correction to be either fixed shift or proportional shift. If desired user can also specify the location of the rectangle.
This amplitude correction must be done prior to trapezoidal correction.
This plugin works in YUY2, YV12, RGB32 and RGB24 color spaces.
| Description | Name | Type | Limits | Default |
| Input clip | clip | none | ||
| Starting frame number to process | sf | integer | within clip | 0 |
| End frame number to process | ef | integer | within clip and not less than sf | last frame |
| type of correction | shift | boolean | true for fixed shift, false for proportional shift | false |
| width of rectangle to be used for deriving correction | xx | int | 5 to frame width/4 | 15 |
| Height of rectangle to be used for deriving correction | yy | int | 5 to 1/4 th of frame height | 5 |
| whether the rectangles to be autopositioned or user specified | auto | boolean | true auto positioning, false for user specified location | true |
| offset of rectangle along width of frame | xoff | int | 0 to frame width - xx | 0 |
| offset of rectangle along height of frame | yoff | int | 0 to frame height - yy | 0 |
TCNAmpAdjust()
avisource("...................");
TCNAmpAdjust( xx =25, yy = 7, shift = true)
TCNAmpAdjust(shift = true, auto = false, xoff = 200, yoff = 50)
# the following script used to output the image below
Avisource("E:\L.avi")
tca = TCNAmpAdjust(shift = false)
tcs= TCNAmpAdjust(shift = true)
stackhorizontal( last. crop(0,0,240,0), tca. crop(0,0,240,0), tcs. crop(0,0,240,0))
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