Sequoia LISST-HOLO, Руководство пользователя

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LISST-
HOLO User’s Guide
69
12 Hologram .PGM File Format Structure
The holograms stored on the flash drive are saved in .PGM format and are composed of two parts.
The first block of bytes in a hologram is the standard PGM format, as follows:
“P5<lf>1600 1200 255<lf> plus 1600 ×1200 bytes containing the hologram data.
The second block of has a size of 1024 bytes and follows immediately after the hologram data. This block holds binary data as
follows:
Bytes
Description
0-7 Seconds since epoch. Time stamp indicating when image was obtained. Unsigned long integer.
8-15 Pressure in counts. Unsigned long integer.
16-17 Temperature in counts.
18-19 Battery/power supply voltage in counts
20-21 Exposure time in 600ns increments.
22-23 Laser power in counts.
24-25 Laser photo diode reading, in counts.
26-27 Camera brightness.
28-29 Camera brightness, minimum value.
30-31 Camera brightness, maximum value.
32-33 Camera shutter.
34-35 Camera shutter, minimum value.
36-37 Camera shutter, maximum value.
38-39 Camera gain.
40-41 Camera gain, minimum value.
42-43 Camera gain, maximum value.
44-115 Not used
116-119 Depth coefficient, DepthA. Floating point number.
120-123 Depth coefficient, DepthB. Floating point number.
124-127 Depth coefficient, DepthC. Floating point number.
128-131 Temperature coefficient, TemperatureA. Floating point number.
132-135 Temperature coefficient, TemperatureB. Floating point number.
136-139 Temperature coefficient, TemperatureC. Floating point number.
140-143 Temperature coefficient, TemperatureSlope. Floating point number.
144-147 Temperature coefficient, TemperatureOffset. Floating point number.
148-151 Auxiliary input A/D channel 2. 8 bits, 0 to 255.
152-155 Auxiliary input A/D channel 3. 8 bits, 0 to 255.
156-159 Auxiliary input A/D channel 4. 8 bits, 0 to 255.
160-163 Auxiliary input A/D channel 5. 12 bits, 0 to 4095.
164-167 Auxiliary input A/D channel 6. 12 bits, 0 to 4095.
168-171 Not used
172-173 Inter-frame delay in milliseconds.
174-181 Millisecond time stamp. Use to determine time between previous or following hologram.
182-1023 Unassigned, set to 0