colour.models.rgb.transfer_functions.canon_log Module¶
Canon Log Encodings¶
Defines the Canon Log encodings:
log_encoding_CanonLog()
log_decoding_CanonLog()
log_encoding_CanonLog2()
log_decoding_CanonLog2()
log_encoding_CanonLog3()
log_decoding_CanonLog3()
See also
References
[1] | Thorpe, L. (2012). CANON-LOG TRANSFER CHARACTERISTIC. Retrieved from http://downloads.canon.com/CDLC/Canon-Log_Transfer_Characteristic_6-20-2012.pdf |
[2] | Canon. (n.d.). EOS C300 Mark II - EOS C300 Mark II Input Transform Version 2.0 (for Cinema Gamut / BT.2020). Retrieved August 23, 2016, from https://www.usa.canon.com/internet/portal/us/home/support/details/cameras/cinema-eos/eos-c300-mark-ii |
Notes
- [2] is available as a Drivers & Downloads Software for Windows 10 (x64) Operating System, a copy of the archive is hosted at this url: https://drive.google.com/open?id=0B_IQZQdc4Vy8ZGYyY29pMEVwZU0
-
colour.models.rgb.transfer_functions.canon_log.
log_encoding_CanonLog
(x)[source]¶ Defines the Canon Log log encoding curve / opto-electronic transfer function.
Parameters: x (numeric or array_like) – Linear data \(x\). Returns: Canon Log non-linear IRE data. Return type: numeric or ndarray Notes
- Output Canon Log non-linear IRE data should be converted to code value CV as follows: CV = IRE * (940 - 64) + 64.
Examples
>>> log_encoding_CanonLog(0.20) * 100 32.7953896...
-
colour.models.rgb.transfer_functions.canon_log.
log_decoding_CanonLog
(clog_ire)[source]¶ Defines the Canon Log log decoding curve / electro-optical transfer function.
Parameters: clog_ire (numeric or array_like) – Canon Log non-linear IRE data. Returns: Linear data \(x\). Return type: numeric or ndarray Notes
- Input Canon Log non-linear IRE data should be converted from code value CV to IRE as follows: IRE = (CV - 64) / (940 - 64).
Examples
>>> log_decoding_CanonLog(32.795389693580908 / 100) 0.19999999...
-
colour.models.rgb.transfer_functions.canon_log.
log_encoding_CanonLog2
(x)[source]¶ Defines the Canon Log 2 log encoding curve / opto-electronic transfer function.
Parameters: x (numeric or array_like) – Linear data \(x\). Returns: Canon Log 2 non-linear IRE data. Return type: numeric or ndarray Notes
- Output Canon Log 2 non-linear IRE data should be converted to code value CV as follows: CV = IRE * (940 - 64) + 64.
Examples
>>> log_encoding_CanonLog2(0.20) * 100 39.2025745...
-
colour.models.rgb.transfer_functions.canon_log.
log_decoding_CanonLog2
(clog2_ire)[source]¶ Defines the Canon Log 2 log decoding curve / electro-optical transfer function.
Parameters: clog2_ire (numeric or array_like) – Canon Log 2 non-linear IRE data. Returns: Linear data \(x\). Return type: numeric or ndarray Notes
- Input Canon Log 2 non-linear IRE data should be converted from code value CV to IRE as follows: IRE = (CV - 64) / (940 - 64).
Examples
>>> log_decoding_CanonLog2(39.202574539700947 / 100) 0.2000000...
-
colour.models.rgb.transfer_functions.canon_log.
log_encoding_CanonLog3
(x)[source]¶ Defines the Canon Log 3 log encoding curve / opto-electronic transfer function.
Parameters: x (numeric or array_like) – Linear data \(x\). Returns: Canon Log 3 non-linear IRE data. Return type: numeric or ndarray Notes
- Output Canon Log 3 non-linear IRE data should be converted to code value CV as follows: CV = IRE * (940 - 64) + 64.
Examples
>>> log_encoding_CanonLog3(0.20) * 100 32.7953567...
-
colour.models.rgb.transfer_functions.canon_log.
log_decoding_CanonLog3
(clog3_ire)[source]¶ Defines the Canon Log 3 log decoding curve / electro-optical transfer function.
Parameters: clog3_ire (numeric or array_like) – Canon Log 3 non-linear IRE data. Returns: Linear data \(x\). Return type: numeric or ndarray Notes
- Input Canon Log 3 non-linear IRE data should be converted from code value CV to IRE as follows: IRE = (CV - 64) / (940 - 64).
Examples
>>> log_decoding_CanonLog3(32.795356721989336 / 100) 0.2000000...