Photo Core Transform Functions

THESE FUNCTIONS ARE DEPRECATED. PLEASE USE CORRESPONDING JPEG XR CODING FUNCTIONS

The photo core transform (PCT) is a lossless nonlinear 4x4 transform operation inspired by a 4x4 DCT. The PCT is defined on integers. In this space it is involutary lossless operation, that is original image can be restored with no losses by the inverse operation from its transformed copy. The entire 4x4 PCT transform process consists of cascade of 2x2 Hadamard 2D transforms combined with 1D and 2D rotate operations.

Table below lists functions for PCT described in more detail later in this section.

Photo Core Transform Functions
Function Base Name	Description
PCTFwd_HDP, PCTFwd8x8_HDP, PCTFwd8x16_HDP, PCTFwd16x16_HDP	THESE FUNCTIONS ARE DEPRECATED. Perform forward photo core transform.
PCTInv_HDP, PCTInv8x8_HDP, PCTInv8x16_HDP, PCTInv16x16_HDP,	THESE FUNCTIONS ARE DEPRECATED. Perform inverse photo core transform.