ImageMorph Module

The ImageMorph module provides morphology operations on images.

class PIL.ImageMorph.LutBuilder(patterns: list[str] | None = None, op_name: str | None = None)

Bases: object

A class for building a MorphLut from a descriptive language

The input patterns is a list of a strings sequences like these:

4:(...
   .1.
   111)->1

(whitespaces including linebreaks are ignored). The option 4 describes a series of symmetry operations (in this case a 4-rotation), the pattern is described by:

• . or X - Ignore

• 1 - Pixel is on

• 0 - Pixel is off

The result of the operation is described after “->” string.

The default is to return the current pixel value, which is returned if no other match is found.

Operations:

• 4 - 4 way rotation

• N - Negate

• 1 - Dummy op for no other operation (an op must always be given)

• M - Mirroring

Example:

lb = LutBuilder(patterns = ["4:(... .1. 111)->1"])
lut = lb.build_lut()

add_patterns(patterns: list[str]) → None

build_default_lut() → None

build_lut() → bytearray

Compile all patterns into a morphology lut.

TBD :Build based on (file) morphlut:modify_lut

get_lut() → bytearray | None

class PIL.ImageMorph.MorphOp(lut: bytearray | None = None, op_name: str | None = None, patterns: list[str] | None = None)

Bases: object

A class for binary morphological operators

apply(image: Image) → tuple[int, Image]

Run a single morphological operation on an image

Returns a tuple of the number of changed pixels and the morphed image

get_on_pixels(image: Image) → list[tuple[int, int]]

Get a list of all turned on pixels in a binary image

Returns a list of tuples of (x,y) coordinates of all matching pixels. See Coordinate System.

load_lut(filename: str) → None

Load an operator from an mrl file

match(image: Image) → list[tuple[int, int]]

Get a list of coordinates matching the morphological operation on an image.

Returns a list of tuples of (x,y) coordinates of all matching pixels. See Coordinate System.

save_lut(filename: str) → None

Save an operator to an mrl file

set_lut(lut: bytearray | None) → None

Set the lut from an external source