Transforming with matrix multiplication

Overview

Matrix multiplication functions treat source pixels as m-element vectors, with the number of vector elements corresponding to the number of channels. The functions multiply each source value by an n x m matrix to produce an n-element destination pixel. You can use matrix multiplication functions for tasks like converting between color spaces. For example, you can multiply three-channel RGB pixels by a 4 x 3 matrix to generate four-channel CMYK pixels.

Topics

Multiplying multiple-plane pixels by a matrix

• Adjusting saturation and applying tone mapping
• vImageMatrixMultiply_Planar8(_:_:_:_:_:_:_:_:_:)
• vImageMatrixMultiply_Planar16S(_:_:_:_:_:_:_:_:_:)
• vImageMatrixMultiply_PlanarF(_:_:_:_:_:_:_:_:)

Multiplying interleaved pixels by a matrix

• vImageMatrixMultiply_ARGB8888(_:_:_:_:_:_:_:)
• vImageMatrixMultiply_ARGBFFFF(_:_:_:_:_:_:)
• vImageMatrixMultiply_ARGB8888ToPlanar8(_:_:_:_:_:_:_:)
• vImageMatrixMultiply_ARGBFFFFToPlanarF(_:_:_:_:_:_:)

See Also

Applying color transforms to images

• Transforming with lookup tables
• Transforming with polynomials
• Transforming with a gamma function
• Applying a flood fill to an image