Scharr

kdenlive-show-video Scharr

Status :

Maintained

Keyframes :

Yes

Source library :

avfilter

Source filter :

scharr

Available :

linux appimage windows apple

On Master only :

No

Known bugs :

No

Color depth :

10bit color-management

Tutorial :

No

Description

This effect/filter applies the Scharr[[1]] operator to the input video stream for edge detection.

Compare Sobel with Planes, Kirsch, Prewitt and Roberts effects.

Parameters

Parameter	Value	Description
Planes to filter	Selection (see below)	Set which planes will be processed, unprocessed planes will be copied. Set to All by default.
Scale	Float	Sets the value which the filtered result will be multiplied with
Delta	Float	Sets the value which will be added to filtered result

The following selection items are available:

Planes to filter

Alpha |
---|---
Luminance (Y) |
Chroma (U plane) |
Chroma (V plane) |
Red |
Green |
Blue |
All | Default

---

[[1]]

For more (mathematical) details refer to the Wikipedia article about Sobel, and there specifically about Alternative Operators. *[RGB]: Red, Green, Blue *[VFX]: Visual Effects *[feathering]: Smoothing or blurring the edges of a feature *[LFO]: Low-Frequency Oscillation *[dB]: decibel *[LUFS]: Loudness Units Full Scale *[AI]: Artificial Intelligence *[LLM]: Large Language Model *[HSV]: Hue, Saturation, Value *[SOP/Sat]: S(lope), O(ffset), P(ower) / SATuration *[CDL]: Color Decision List *[HSL]: Hue, Saturation, Lightness - Using HSL color space is useful for subtle color changes *[px]: pixel *[hh:mm:ss:ff]: hours:minutes:seconds:frames *[Hz]: Hertz