img blend

Blends two images together using the specified blend mode. Here the base layer is the bottom layer, and the blend layer the top.

--modes

List all available modes

--opacity <n>

Opacity of blend image layer (default: 1.0)

--fit

Fit the blend layer to the base layer, may result in loss of quality

The other flags allow you to select the blend mode used.

--normal

Selects the blend image

--dissolve

Randomly selects the blend image, depending on its opacity

--darken

Selects the darkest value for each colour channel

--multiply

Multiplies each colour channel

--burn

Darkens the base image to increase contrast

--linear-burn

Adds the blend colour to the base colour, then subtracts white

--darker

Selects the darkest colour by comparing the sum of channels

--lighten

Selects the lightest value for each colour channel

--screen

Multiplies the inverse of each colour channel

--dodge

Brightens the base image to decrease contrast

--linear-dodge

Adds the blend colour to the base colour

--lighter

Selects the lightest colour by comparing the sum of channels

--overlay

Multiplies or screens the colours, depending on the base colour

--soft-light

Darkens or lightens the colours, depending on the blend colour

--hard-light

Multiplies or screens the colours, depending on the blend colour

--vivid-light

Linear burns or dodges to colours, depending on the blend colour

--pin-light

Replaces the colours, depending on the blend colour

--hard-mix

Makes all pixels red, green, blue, white or black

--difference

Finds the absolute difference between the base and blend colour

--exclusion

Creates an effect similar to, but lower in contrast than, difference

--subtraction

Subtracts the blend colour from the base colour

--hue

Uses just the hue of the blend colour

--saturation

Uses just the saturation of the blend colour

--color

Uses just the hue and saturation of the blend colour

--luminosity

Uses just the luminosity of the blend colour