Method: Vips::Image.tonelut

Defined in:
lib/vips8/methods.rb

.tonelut(opts = {}) ⇒ Vips::Image

Build a look-up table.

Parameters:

  • opts (Hash) (defaults to: {}) —

    Set of options

Options Hash (opts):

  • :in_max (Integer) —

    Size of LUT to build

  • :out_max (Integer) —

    Maximum value in output LUT

  • :Lb (Float) —

    Lowest value in output

  • :Lw (Float) —

    Highest value in output

  • :Ps (Float) —

    Position of shadow

  • :Pm (Float) —

    Position of mid-tones

  • :Ph (Float) —

    Position of highlights

  • :S (Float) —

    Adjust shadows by this much

  • :M (Float) —

    Adjust mid-tones by this much

  • :H (Float) —

    Adjust highlights by this much

Returns:

[View source]


# File 'lib/vips8/methods.rb', line 776