@jmu-cs/customscale-camanjs-filter
v1.0.0
Published
Grayscale an input image, then map black and white to custom colors.
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customscale-camanjs-filter
Grayscale the input image, then map black and white to custom colors.
Example
Caman('#canvas', function () {
this.revert(false)
this.customscale()
this.render()
The custom scale filter accepts four optional arguments (customscale([luminance[, black[, white[, scalingFunction]]]])
):
- luminance
- whether to grayscale the image using "luminance" values (
grayscale (r, g, b) == original (r * 0.299, g * 0.587, b * 0.114)
) or simple average - default: true, so use the "luminance" values
- whether to grayscale the image using "luminance" values (
- black
- the color to which grayscaled black should be mapped
- default: JMU Purple = #450084
- white
- the color to which grayscaled white should be mapped
- default: JMU Gold = #cbb677
- scalingFunction
- a function that accepts a percentage value (percent of max color value ==
input/255.0
) and returns a new percentage to change the map from grayscale to customscale to a custom curve - default: linear (returns percentage without modification)
- a function that accepts a percentage value (percent of max color value ==