Color Space Conversion Module

Color Space Conversion Module

jpegenc.subblocks.color_converters.rgb2ycbcr.rgb2ycbcr

Color Space Conversion module

This module is used to transform the rgb input to an other representation called YCbCr. The input interface is the RGB and the output is the Ycbcr. The inputs and outputs are parallel.

Inputs:

Red, Green, Blue, data_valid clock, reset

Outputs:

Y, Cb ,Cr, data_valid

Parameters:

num_fractional_bits

class jpegenc.subblocks.color_converters.rgb2ycbcr.ColorSpace(red=0, green=0, blue=0)

Color Space Conversion Class

It is used to derive the integer coefficients and as a software reference for the conversion

_set_jfif_coefs()

The YCbCr special constants

The JFIF YCbCr conversion requires “special” constants defined by the standard. The constants are describe in a Wikipedia page: https://en.wikipedia.org/wiki/YCbCr

get_jfif_ycbcr()

RGB to YCbCr Conversion. Used as software reference.

get_jfif_ycbcr_int_coef(precision_factor=0)

Generate the integer (fixed-point) coefficients