Documentation
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Overview ¶
Package perspective is used for creating and applying perspective transforms with the help of two quadrilaterals. A perspective transform can be used to map each point of one quadrilateral to another, given the corner coordinates for the source and destination quadrilaterals.
Index ¶
Constants ¶
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Variables ¶
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Functions ¶
This section is empty.
Types ¶
type Perspective ¶
type Perspective struct {
// SrcPoints is an array of the corner coordinates of the source
// quadrilateral.
SrcPoints [8]float64
// DstPoints is an array of the corner coordinates of the destination
// quadrilateral.
DstPoints [8]float64
// Coeffs is a homographic transform matrix, expressed as an array of
// coefficients.
Coeffs [9]float64
// CoeffsInv is an inverse homographic transform matrix, expressed as an
// array of coefficients.
CoeffsInv [9]float64
}
func New ¶
func New(srcPoints, dstPoints [8]float64) *Perspective
New takes the corner coordinates of the source and destination quadrilaterals in a [x1, y1, x2, y2, x3, y3, x4, y4] form.
func (*Perspective) Transform ¶
func (t *Perspective) Transform(sx, sy float64) (dx, dy float64)
Transform maps a point from the source quadrilateral to the destination quadrilateral.
func (*Perspective) TransformInv ¶
func (t *Perspective) TransformInv(sx, sy float64) (dx, dy float64)
TransformInv maps a point from the destination quadrilateral to the source quadrilateral.
Source Files
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