Package com.google.zxing.common

Class DefaultGridSampler

java.lang.Object

com.google.zxing.common.GridSampler

com.google.zxing.common.DefaultGridSampler

public final class DefaultGridSampler
extends GridSampler

Author:

Sean Owen

Constructor Summary

Constructors

Constructor	Description
DefaultGridSampler()

Method Summary

Modifier and Type	Method	Description
BitMatrix	sampleGrid(BitMatrix image, int dimensionX, int dimensionY, float p1ToX, float p1ToY, float p2ToX, float p2ToY, float p3ToX, float p3ToY, float p4ToX, float p4ToY, float p1FromX, float p1FromY, float p2FromX, float p2FromY, float p3FromX, float p3FromY, float p4FromX, float p4FromY)	Samples an image for a rectangular matrix of bits of the given dimension.
BitMatrix	sampleGrid(BitMatrix image, int dimensionX, int dimensionY, PerspectiveTransform transform)

Methods inherited from class com.google.zxing.common.GridSampler

checkAndNudgePoints, getInstance, setGridSampler

Methods inherited from class java.lang.Object

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

Constructor Details

DefaultGridSampler

public DefaultGridSampler()

Method Details

sampleGrid

public BitMatrix sampleGrid(BitMatrix image,
 int dimensionX,
 int dimensionY,
 float p1ToX,
 float p1ToY,
 float p2ToX,
 float p2ToY,
 float p3ToX,
 float p3ToY,
 float p4ToX,
 float p4ToY,
 float p1FromX,
 float p1FromY,
 float p2FromX,
 float p2FromY,
 float p3FromX,
 float p3FromY,
 float p4FromX,
 float p4FromY)
                     throws NotFoundException

Description copied from class: GridSampler

Samples an image for a rectangular matrix of bits of the given dimension. The sampling transformation is determined by the coordinates of 4 points, in the original and transformed image space.

Specified by:

sampleGrid in class GridSampler

Parameters:

image - image to sample

dimensionX - width of BitMatrix to sample from image

dimensionY - height of BitMatrix to sample from image

p1ToX - point 1 preimage X

p1ToY - point 1 preimage Y

p2ToX - point 2 preimage X

p2ToY - point 2 preimage Y

p3ToX - point 3 preimage X

p3ToY - point 3 preimage Y

p4ToX - point 4 preimage X

p4ToY - point 4 preimage Y

p1FromX - point 1 image X

p1FromY - point 1 image Y

p2FromX - point 2 image X

p2FromY - point 2 image Y

p3FromX - point 3 image X

p3FromY - point 3 image Y

p4FromX - point 4 image X

p4FromY - point 4 image Y

Returns:

BitMatrix representing a grid of points sampled from the image within a region defined by the "from" parameters

Throws:

NotFoundException - if image can't be sampled, for example, if the transformation defined by the given points is invalid or results in sampling outside the image boundaries

sampleGrid

public BitMatrix sampleGrid(BitMatrix image,
 int dimensionX,
 int dimensionY,
 PerspectiveTransform transform)
                     throws NotFoundException

Specified by:

sampleGrid in class GridSampler

Throws:

NotFoundException