com.google.zxing.common.detector

类 WhiteRectangleDetector

java.lang.Object

com.google.zxing.common.detector.WhiteRectangleDetector

public final class WhiteRectangleDetector
extends java.lang.Object

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.

作者:

David Olivier

构造器概要

构造器

构造器和说明
WhiteRectangleDetector(BitMatrix image)
WhiteRectangleDetector(BitMatrix image, int initSize, int x, int y)

方法概要

限定符和类型	方法和说明
ResultPoint[]	detect() Detects a candidate barcode-like rectangular region within an image.

从类继承的方法 java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

WhiteRectangleDetector

public WhiteRectangleDetector(BitMatrix image)
                       throws NotFoundException

抛出:

NotFoundException

WhiteRectangleDetector

public WhiteRectangleDetector(BitMatrix image,
                              int initSize,
                              int x,
                              int y)
                       throws NotFoundException

参数:

image - barcode image to find a rectangle in

initSize - initial size of search area around center

x - x position of search center

y - y position of search center

抛出:

NotFoundException - if image is too small to accommodate initSize

方法详细资料

detect

public ResultPoint[] detect()
                     throws NotFoundException

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.

返回:

ResultPoint[] describing the corners of the rectangular region. The first and last points are opposed on the diagonal, as are the second and third. The first point will be the topmost point and the last, the bottommost. The second point will be leftmost and the third, the rightmost

抛出:

NotFoundException - if no Data Matrix Code can be found