Pco ultraviolet, User Manual

Page: 46 / 53

46
A2 IMAGE FILE FORMATS
There are different file formats available for saving camera images
with Camware.
b16
The b16 16 bit format is similar to the bmp format. However, 16 bit
pixel values are used instead of 8 bit pixel values.
The file format consists either of a Basic Header (6 Long-parameter)
or an Extended Header (32 Long-parameter), the latter of which is
optionally for additional information. There might follow a variable
comment field (ASCII code). Finally, there is the actual data set that is
saved linearly (as in the case of BMP files).
With the exception of the first value, all parameters are Long Integers
(4 Byte). The first 6 parameters must always exist. The rest of the
parameters, as well as the comment field, are optional.
Parameter Function
1 PCO- the first 4 byte are the characters PCO-
2 file size file size in byte
3 header length header size + comment filed in byte
4 image width image width in pixel
5 image height image height in pixel
6 extended header -1 (true), extended header follows
7 color mode 0 = black/with camera, 1 = color camera
8 b/w min black/white LUT-setting, minimum value
9 b/w max black/white LUT-setting, maximum value
10 b/w linlog black/white LUT-setting,
0 = linear, 1 = logarithmic
11 red min red LUT-setting, minimum value
12 red max red LUT-setting, maximum value
13 green min green LUT-setting, minimum value
14 green max green LUT-setting, maximum value
15 blue min blue LUT-setting, minimum value
16 blue max blue LUT-setting, maximum value
17 color linlog color LUT-setting, 0 = linear, 1 = logarithmic
18

266
internal use
Comment file in ASCII characters with variable length of 0…XX.
The length of the comment file must be documented in the header length field.
16 bit pixel data
line 1,
pixel 1 value of the first pixel
line 1,
pixel 2 value of the second pixel
… …
PCO recommends that all images should be saved first in the b16
or TIFF format. The advantage is to have the b16 or tiff images
available all the time. You will always have the maximum 16 bit
information. Note that not all image analysis programs can
accommodate 16 bit data. The 8 bit format saves only the information
displayed on the monitor screen. The 16 bit information will be lost
and cannot be recovered.
pcoraw
This 16 bit PCO file format is based on the new BigTIFF format, thus
allowing for file size > 4GB. A new PCO proprietary compression
scheme is added in case it is necessary