BOBCAT HD-SDI
Hardware User’s Manual
Imperx, Inc.
Rev. 1.4
6421 Congress Ave.
6/2/2014
Boca Raton, FL 33487
+1 (561) 989-0006
162 of 175
C.1 OVERVIEW
The Defective Pixel Map (DPM) and Hot Pixel Map (HPM) are provided with each
camera. If the user wants to create its own DPM or HPM file, he/she can use any
standard ASCII text editor or Microsoft Excel. Additionally, any spreadsheet or
mathematical program capable of generating a comma delimited (.csv) file can be
used.
C.2 USING AN ASCII TEXT EDITOR
A custom Defective Pixel Map (DPM) and Hot Pixel Map (HPM) can be prepared
using any ASCII text editor, such as “Notepad” or similar. The file must have a .dpm
extension for DPM map and .hpm extension for HPM. The .dpm (or .hpm) file has 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 in a comma. The
‘table’ section of the file contains an array of lines with each line containing an X
(pixel number) value followed by a comma and a Y (line number) value. All pixels are
listed in the DPM (or HPM) in order of increasing Y location. If the Y location is
identical, the listing is in order of increasing X location. After editing save each file
with the appropriate file extension. The maximum number of pixels in the DMP list is
128, and in HPM list is 1024.
Here is a simple example how to create a DPM. Create the DPM file with extension
.dpm using “Notepad” or any other editing software. Locate the defective pixels in the
camera and enter them in order starting with the smallest pixel number of the line
number first. The file looks like this:
-- Defective Pixel Map,
-- Date: 7/21/2009,
-- Model#: ICL-B0610M,
-- Serial#: 060380,
:Table,
-- Column(X),Row(Y)
4,1
588,1
78,5
82,27
405,300
Note.
In this example the first table entry is pixel 4 from line 1, the next entry is pixel 588
from line 1, and the next entry is pixel 78 from line 5 and so on.
