Subtraction

Makes a subtraction between two images.

🖼️ Image options and parameters of subtract method
🎭 Mask options and parameters of subtract method

Method called subtract, as the name suggests, takes another Image(or Mask) and makes a subtraction between each respective bit. It works like this:

let mask = new Mask(3, 3, {
  data: new Uint8Array([1, 1, 1, 1, 1, 1, 1, 1, 1]),
});
let mask2 = new Mask(3, 3, {
  data: new Uint8Array([1, 1, 1, 0, 0, 0, 0, 0, 1]),
});
mask = mask.subtract(mask2);
// expect mask to equal [0,0,0,1,1,1,1,1,0]

caution

Both masks must have the same size for compatibility reasons. Images must have the same size, channel number and bit depth.

Kinds of images compatible with algorithm

Image property	What it means	Possible values
bitDepth	number of bits per channel	[1,8,16]
components	number of components	any
alpha	is alpha channel allowed	false

Parameters and default values

info

Parameters and options for Images and Masks are the same.

• other

• options

Options

Property	Required	Default value
absolute	no	false

info

The method is also available for Masks.