Senop HSC-2, Руководство пользователя

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ENVI Data type
The stored data can be analyzed using a 3
rd
party software. All the sequences in a given script are stored in
the same folder. There is a .png preview images of every frame, the actual data in Envi file format and a
header file, which contains information about the recording parameters.
By default, HSC-2 uses ENVI type image cubes.
•
.dat file is ENVI type flat binary file.
•
Corresponding Envi Header file (.hdr) is key to open data file.
Header file specifies metadata needed to use .dat file.
•
For example: “wavelength = {500.0, 640.0}”
o
In this example there is 2 images in Envi hypercube (.dat), first one taken at 500nm
wavelength and second at 640nm.
•
There is lot of other information also in header. Like: “Data type = 12” (16-bit unsigned integer),
“byte order = 1” (most significant byte first (MSF)), “data gain values = {0.000542, 0.000557}”
(These values are used to convert integer values in cube to SI unit, different for each image.) etc.
Free programs are available to open ENVI files, as there is libraries to handle ENVI in MatLab or similar
programs.
Below is a list of all the data contained in the header file.
Envi header
name Example Description
Envi - Type of the header
description Senop Hype2.0 Image Camera name
wavelength
units nm Unit of the wavelength
samples 1024 Number of pixels in horizontal
direction
lines 1024 Number of pixels in vertical
direction
file type ENVI Type of the file
interleave BSQ Data Interleave type, BSQ=Band
Sequential
byte order 1 Byte order, 1=Most significant
byte first (MSF)
data type 12 Type of data representation,
12=Unsigned integer:16 bit
senop
sequence
name Sequence Name of the recorded sequence
bands 5 Number of measurement bands
acquisition
time 2019-03-22T09:36:31.940629000Z Time of the acquisition
wavelength {500.0,600.0,700.0,800.0,900.0} Measured wavelengths in the
sequence