Pco pixelfly usb - A4 Image File Formats

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A4 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 of 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 filed 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
…
…
We recommend 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. Please 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 displayed later.
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