WhiteRectangleDetector class

Detects a candidate barcode-like rectangular region within an image.

It starts around the center of the image, increases the size of the candidate region until it finds a white rectangular region. By keeping track of the last black points it encountered, it determines the corners of the barcode.

@author David Olivier

Constructors

WhiteRectangleDetector(BitMatrix _image, [int initSize = _initSize, int? x, int? y])

@param image barcode image to find a rectangle in @param initSize initial size of search area around center @param x x position of search center @param y y position of search center @throws NotFoundException if image is too small to accommodate initSize

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

centerEdges(ResultPoint y, ResultPoint z, ResultPoint x, ResultPoint t) → List<ResultPoint>

recenters the points of a constant distance towards the center

containsBlackPoint(int a, int b, int fixed, bool horizontal) → bool

Determines whether a segment contains a black point

detect() → List<ResultPoint>

Detects a candidate barcode-like rectangular region within an image. It starts around the center of the image, increases the size of the candidate region until it finds a white rectangular region.

getBlackPointOnSegment(double aX, double aY, double bX, double bY) → ResultPoint?

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited