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func (Aff3) Mult ¶

func (p Aff3) Mult(q Aff3) Aff3

Cut-n-pasted from image@0.7.0/draw/scale:matMul

func (Aff3) Rotate ¶

func (m1 Aff3) Rotate(thetaDeg float64) Aff3

func (Aff3) Translate ¶

func (m1 Aff3) Translate(tx, ty float64) Aff3

func (*FloatGrid) CalculateGradients ¶

func (H *FloatGrid) CalculateGradients(depth int) (FloatGrid, float64)

func (*FloatGrid) Copy ¶

func (g1 *FloatGrid) Copy() *FloatGrid

func (*FloatGrid) DownSample ¶

func (g1 *FloatGrid) DownSample() FloatGrid

DownSample returns a grid that is 1/4 of the size, averaging the values from the original.

func (*FloatGrid) Dx ¶

func (fg *FloatGrid) Dx() int

func (*FloatGrid) Dy ¶

func (fg *FloatGrid) Dy() int

func (*FloatGrid) FindMaxMinLumAtPercentile ¶

func (I *FloatGrid) FindMaxMinLumAtPercentile(minPrct, maxPrct float64) (float64, float64)

func (FloatGrid) GaussianBlur ¶

func (g1 FloatGrid) GaussianBlur() FloatGrid

func (*FloatGrid) Get ¶

func (fg *FloatGrid) Get(x, y int) float64

func (*FloatGrid) NewFromThis ¶

func (g1 *FloatGrid) NewFromThis() FloatGrid

func (*FloatGrid) Ptr2array ¶

func (fg *FloatGrid) Ptr2array() *float64

func (*FloatGrid) Set ¶

func (fg *FloatGrid) Set(x, y int, v float64)

func (*FloatGrid) Stats ¶

func (fg *FloatGrid) Stats() string

func (*FloatGrid) ToImg ¶

func (fg *FloatGrid) ToImg(title, filename string)

ToImg saves a simple grayscale, based on the range of values in the grid, and gamma scaling the gray to look normal for human vision

func (*FloatGrid) UpSampleInto ¶

func (A *FloatGrid) UpSampleInto(B *FloatGrid)

UpSampleInto populates a grid `B`, which is assumed be 2x as big, by simply copying each value from `A` four times into a 2x2 block of values in `B`

func (Mat3) Apply ¶

func (m Mat3) Apply(v Vec3) Vec3

func (Mat3) Mult ¶

func (a Mat3) Mult(b Mat3) Mat3

func (Mat3) String ¶

func (m Mat3) String() string

func (*Vec3) CeilingAt ¶

func (v *Vec3) CeilingAt(max float64)

func (*Vec3) FloorAt ¶

func (v *Vec3) FloorAt(min float64)

func (Vec3) InvertDiag ¶

func (v Vec3) InvertDiag() Mat3

Places the vector on the diagonal of a matrix, then inverts it

func (Vec3) String ¶

func (v Vec3) String() string