histogram

Compute and draw a color distribution histogram for the input video.

The computed histogram is a representation of the color component distribution in an image.

Standard histogram displays the color components distribution in an image. Displays color graph for each color component. Shows distribution of the Y, U, V, A or R, G, B components, depending on input format, in the current frame. Below each graph a color component scale meter is shown.

The filter accepts the following options:

level_height

Set height of level. Default value is 200. Allowed range is [50, 2048].

scale_height

Set height of color scale. Default value is 12. Allowed range is [0, 40].

display_mode

Set display mode. It accepts the following values:

‘stack’

Per color component graphs are placed below each other.

‘parade’

Per color component graphs are placed side by side.

‘overlay’

Presents information identical to that in the parade, except that the graphs representing color components are superimposed directly over one another.

Default is stack.

levels_mode

Set mode. Can be either linear, or logarithmic. Default is linear.

components

Set what color components to display. Default is 7.

fgopacity

Set foreground opacity. Default is 0.7.

bgopacity

Set background opacity. Default is 0.5.

colors_mode

Set colors mode. It accepts the following values:

‘whiteonblack’

‘blackonwhite’

‘whiteongray’

‘blackongray’

‘coloronblack’

‘coloronwhite’

‘colorongray’

‘blackoncolor’

‘whiteoncolor’

‘grayoncolor’

Default is whiteonblack.

Examples

• Calculate and draw histogram:

  ffplay -i input -vf histogram