# frei0r-filter-levels

Adjust luminance or color channel intensity

## Hierarchy

    GObject
        ╰──GInitiallyUnowned
            ╰──GstObject
                ╰──GstElement
                    ╰──GstBaseTransform
                        ╰──GstVideoFilter
                            ╰──frei0r-filter-levels

## Factory details

Authors: – Sebastian Dröge <sebastian.droege@collabora.co.uk>, Maksim Golovkin</sebastian.droege@collabora.co.uk>

Classification: – `Filter/Effect/Video`

Rank – none

Plugin – frei0r

Package – GStreamer Bad Plug-ins

## Pad Templates

### `sink`

    video/x-raw:
             format: RGBA
              width: [ 1, 2147483647 ]
             height: [ 1, 2147483647 ]
          framerate: [ 0/1, 2147483647/1 ]

Presence – always

Direction – sink

Object type – GstPad

### `src`

    video/x-raw:
             format: RGBA
              width: [ 1, 2147483647 ]
             height: [ 1, 2147483647 ]
          framerate: [ 0/1, 2147483647/1 ]

Presence – always

Direction – src

Object type – GstPad

## Properties

### black-output

    “black-output” gdouble

Black output

Flags : Read / Write

Default value : 0

### channel

    “channel” gdouble

Channel to adjust levels. 0%%=R, 10%%=G, 20%%=B, 30%%=Luma

Flags : Read / Write

Default value : 0.3

### gamma

    “gamma” gdouble

Gamma

Flags : Read / Write

Default value : 0.25

### histogram-position

    “histogram-position” gdouble

Histogram position. 0%%=TL, 10%%=TR, 20%%=BL, 30%%=BR

Flags : Read / Write

Default value : 0.3

### input-black-level

    “input-black-level” gdouble

Input black level

Flags : Read / Write

Default value : 0

### input-white-level

    “input-white-level” gdouble

Input white level

Flags : Read / Write

Default value : 1

### show-histogram

    “show-histogram” gboolean

Show histogram

Flags : Read / Write

Default value : true

### white-output

    “white-output” gdouble

White output

Flags : Read / Write

Default value : 1

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