Package com.google.zxing.common
Class PerspectiveTransform
java.lang.Object
com.google.zxing.common.PerspectiveTransform
This class implements a perspective transform in two dimensions. Given four source and four destination points, it will compute the transformation implied between them. The code is based directly upon section 3.4.2 of George Wolberg's "Digital Image Warping"; see pages 54-56.
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Field Summary
Fields -
Constructor Summary
ConstructorsModifierConstructorDescriptionprivate
PerspectiveTransform
(float a11, float a21, float a31, float a12, float a22, float a32, float a13, float a23, float a33) -
Method Summary
Modifier and TypeMethodDescription(package private) PerspectiveTransform
static PerspectiveTransform
quadrilateralToQuadrilateral
(float x0, float y0, float x1, float y1, float x2, float y2, float x3, float y3, float x0p, float y0p, float x1p, float y1p, float x2p, float y2p, float x3p, float y3p) static PerspectiveTransform
quadrilateralToSquare
(float x0, float y0, float x1, float y1, float x2, float y2, float x3, float y3) static PerspectiveTransform
squareToQuadrilateral
(float x0, float y0, float x1, float y1, float x2, float y2, float x3, float y3) (package private) PerspectiveTransform
times
(PerspectiveTransform other) void
transformPoints
(float[] points) void
transformPoints
(float[] xValues, float[] yValues)
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Field Details
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a11
private final float a11 -
a12
private final float a12 -
a13
private final float a13 -
a21
private final float a21 -
a22
private final float a22 -
a23
private final float a23 -
a31
private final float a31 -
a32
private final float a32 -
a33
private final float a33
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Constructor Details
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PerspectiveTransform
private PerspectiveTransform(float a11, float a21, float a31, float a12, float a22, float a32, float a13, float a23, float a33)
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Method Details
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quadrilateralToQuadrilateral
public static PerspectiveTransform quadrilateralToQuadrilateral(float x0, float y0, float x1, float y1, float x2, float y2, float x3, float y3, float x0p, float y0p, float x1p, float y1p, float x2p, float y2p, float x3p, float y3p) -
transformPoints
public void transformPoints(float[] points) -
transformPoints
public void transformPoints(float[] xValues, float[] yValues) -
squareToQuadrilateral
public static PerspectiveTransform squareToQuadrilateral(float x0, float y0, float x1, float y1, float x2, float y2, float x3, float y3) -
quadrilateralToSquare
public static PerspectiveTransform quadrilateralToSquare(float x0, float y0, float x1, float y1, float x2, float y2, float x3, float y3) -
buildAdjoint
PerspectiveTransform buildAdjoint() -
times
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