colour.RGB_to_YcCbcCrc¶
-
colour.
RGB_to_YcCbcCrc
(RGB, out_bits=10, out_legal=True, out_int=False, is_12_bits_system=False, **kwargs)[source]¶ Converts an array of RGB linear values to the corresponding Yc’Cbc’Crc’ colour encoding values array.
- Parameters
RGB (array_like) – Input RGB array of linear float values.
out_bits (int, optional) – Bit depth for integer output, or used in the calculation of the denominator for legal range float values, i.e. 8-bit means the float value for legal white is 235 / 255. Ignored if
out_legal
andout_int
are both False. Default is 10.out_legal (bool, optional) – Whether to return legal range values. Default is True.
out_int (bool, optional) – Whether to return values as
out_bits
integer code values. Default is False.is_12_bits_system (bool, optional) – Recommendation ITU-R BT.2020 OETF (OECF) adopts different parameters for 10 and 12 bit systems. Default is False.
- Other Parameters
out_range (array_like, optional) – Array overriding the computed range such as out_range = (Y_min, Y_max, C_min, C_max). If
out_range
is undefined, Y_min, Y_max, C_min and C_max will be computed usingcolour.models.rgb.ycbcr.YCbCr_ranges()
definition.- Returns
Yc’Cbc’Crc’ colour encoding array of integer or float values.
- Return type
ndarray
Notes
Domain *
Scale - Reference
Scale - 1
RGB
[0, 1]
[0, 1]
Range *
Scale - Reference
Scale - 1
YcCbcCrc
[0, 1]
[0, 1]
* This definition has input and output integer switches, thus the domain-range scale information is only given for the floating point mode.
Warning
This definition is specifically for usage with Recommendation ITU-R BT.2020 when adopting the constant luminance implementation.
References
[InternationalTUnion15a], [Wik04e]
Examples
>>> RGB = np.array([0.18, 0.18, 0.18]) >>> RGB_to_YcCbcCrc(RGB, out_legal=True, out_bits=10, out_int=True, ... is_12_bits_system=False) array([422, 512, 512])