Cheetah Python Cameras User Manual | CoaXPress (CXP) Interface
August 27, 2019
Page
80
of
86
Rev 1.0
Creating DPC / HPC Tables
Overview
Defective Pixel Correction and Hot Pixel Correction work with predetermined and
preloaded Defective and Hot pixel maps. The Defective Pixel Map (DPM) and Hot Pixel Map
(HPM) are downloaded into the camera’s non-volatile memory.
You can edit the original DPM / HPM file, create your own file and upload it to fit the unique
requirements of your operating environment or camera use.
To get the original DPM and HPM files please contact technical support at:
Email: [email protected]
Toll Free 1 (866) 849-1662 or (+1) 561-989-0006
Fax: (+1) 561-989-0045
Editing DMP / HPM Files
You can edit DPM and HPM files in Microsoft Notepad or any other editing software. The
files look like this:
-- Defective Pixel Map,
-- Date: 2.23.2018,
-- Model#: CLF-C5180M-CF,
-- Serial#: LAC001,
:Table,
-- Column(X),Row(Y)
5683,155
3091,332
3532,893
650,1017
701,1017
1712,1053
914,1067
Pixel maps have two main sections: a header and a table. The header section is a free text
area of up to 256 ASCII characters. Each line of the header section must be terminated with
a comma. The table section of the file contains an array of lines with each line containing
an X (column number) value followed by a comma and a Y (row number) value.
All pixels are listed in the DPM or HPM in order of increasing Y (row) location. If the Y
location is identical, the listing is in order of increasing X (column) location.
The maximum number of pixels in the DMP list is 512 and in HPM list is 4096.
To edit original DPM or HPM file, you need to identify defective or hot pixels, locate and
adjust their coordinates, and accurately place pixels’ coordinates into the pixel map.