Reel.Deal: more info

2015-11-29T20:05:24Z

more info

Reel.Deal: WarpSharp/Xsharpen

2015-11-29T16:06:41Z

WarpSharp/Xsharpen

New page

{{FilterCat4|External_filters|Plugin_functions|Adjustment_filters|Sharpeners}}
Sharpening filter like VirtualDub's [http://rationalqm.us/xsharp.html Xsharpen]. It works as follows:

#It computes the minimum and maximum value of luma from the neighboring 8 pixels.
#It chooses smaller one between absolute values from the center of the minimum value and maximum value.
#Then, it interpolates the chosen value with luma.
 

== [[Script variables|Syntax and Parameters]] ==
:{{Template:FuncDef|Xsharpen (clip, int "strength", int "threshold")}}
 
::{{Par2| |clip| |}}
:::Input clip.
 
::{{Par2|strength|int|128|}}
:::Strength
 
::{{Par2|threshold|int|8}}
:::Threshold
 

== Examples ==
Xsharpen with default settings:
[[AviSource]]("Blah.avi")
Xsharpen(strength=128, threshold=8)
 
--------------------------------------------------------
'''Back to [[WarpSharp]] ←'''

@@ Line 1: / Line 1: @@
 {{FilterCat4|External_filters|Plugin_functions|Adjustment_filters|Sharpeners}}
-Sharpening filter like VirtualDub's [http://rationalqm.us/xsharp.html Xsharpen]. It works as follows:
+Sharpening filter like VirtualDub's [http://rationalqm.us/xsharp.html Xsharpen]. This filter performs a subtle but useful sharpening effect. It operates by running a small window over the frame and each center pixel is either passed through untouched (depending upon a {{Template:FuncDef3|threshold}} setting), or mapped to either the brightest or dimmest pixel in the window, depending upon which is nearest to the center pixel. If the center pixel is mapped, it is also alpha-blended with the original pixel value using a configurable {{Template:FuncDef3|strength}} setting. The result is a sharpening effect that not only avoids amplifying noise, but also tends to reduce it. A welcome side effect is that files processed with this filter tend to compress to smaller files.
+<br>
-#It computes the minimum and maximum value of luma from the neighboring 8 pixels.
-#It chooses smaller one between absolute values from the center of the minimum value and maximum value.
-#Then, it interpolates the chosen value with luma.
 <br>
 == [[Script variables|Syntax and Parameters]] ==
 :{{Template:FuncDef|Xsharpen (clip, int "strength", int "threshold")}}
@@ Line 14: / Line 10: @@
 <br>
 ::{{Par2|strength|int|128|}}
-:::Strength
+:::When this value is 255, mapped pixels are not blended with the original pixel values, so a full-strength effect is obtained. As the value is reduced, each mapped pixel is blended with more of the original pixel. At a value of 0, the original pixels are passed through and there is no sharpening effect.
 <br>
 ::{{Par2|threshold|int|8}}
-:::Threshold
+:::This value determines how close a pixel must be to the brightest or dimmest pixel to be mapped. If a pixel is more than {{Template:FuncDef3|threshold}} away from the brightest or dimmest pixel, it is not mapped. Thus, as the {{Template:FuncDef3|threshold}} is reduced, pixels in the mid range start to be spared.
 <br>

WarpSharp/Xsharpen - Revision history

Reel.Deal: more info

Reel.Deal: WarpSharp/Xsharpen