File types

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File type and extensions constants

These constants are file types and extensions. It can be used for filenames testing or with acquisition functions.

Python example:

# measure and save one 0.25 second frame to png file named "testFile.png"
dev.doSimpleAcquisition(1, 0.25, pixet.PX_FTYPE_PNG, "testFile")
dev.doSimpleAcquisition(1, 0.25, pixet.PX_FTYPE_AUTODETECT, "testFile.png")

File types and extensions constants table

File type constants	File extensions constants	Exts
PX_FTYPE_NONE	(No direct file saving – data stored only in memory)
PX_FTYPE_AUTODETECT	(FTYPE detected by extension in a filename)
PX_FTYPE_ASCII_FRAME	PX_EXT_ASCII_FRAME	"txt"
PX_FTYPE_BINARY_FRAME	PX_EXT_BINARY_FRAME	"pbf"
PX_FTYPE_MULTI_FRAME	PX_EXT_MULTI_FRAME	"pmf"
PX_FTYPE_BINARY_MULTIFRAME	PX_EXT_BINARY_MULTI_FRAME	"bmf"
PX_FTYPE_TPX3_PIXELS	PX_EXT_TPX3_PIXELS	"t3p"
PX_FTYPE_TPX3_PIXELS	PX_ASCII PX_EXT_TPX3_PIXELS_ASCII	"t3pa"
PX_FTYPE_CLUSTER_LOG	PX_EXT_CLUSTER_LOG	"clog"
PX_FTYPE_PIXEL_LOG	PX_EXT_PIXEL_LOG	"plog"
PX_FTYPE_PNG	PX_EXT_PNG	"png"
PX_FTYPE_TPX3_RAW_DATA	PX_EXT_TPX3_RAW_DATA	"t3r"
PX_FTYPE_PIXET_RAW_DATA	PX_EXT_PIXET_RAW_DATA	"prd"
PX_FTYPE_EXTERNAL
(description file saved automatically with pmf/txt)	PX_EXT_FRAME_DESC	"dsc"
(index file saved automatically with pmf/txt)	PX_EXT_INDEX	"idx"

Files extensions summary

txt	ASCII matrix: Text files with img lines converted to text lines with numbers separated by spaces.
pbf	Simple binary files, numbers only.
pmf	Multiple frames. Default is same as the txt, but multiple frames on top of each other. Can use BINARY flag.
t3pa	Tpx3 pixels ASCII. Text format, tab-separated columns with the header in the first row. Biggest to saving.
t3p	Tpx3 pixels. Binary format. Lower saved size, more complex to understand.
t3r	Tpx3 raw data. Fastest to saving, difficult to understand, slow to processing and can cause processing errors.
bstg	Binary settings file: Measured data with all configuration (see Spectraimg methods and properties).
clog, plog	Clusters/pixels logs. Text files contains clusters separated to frames with pixels lists. Historic formats for saving a data with few hited pixels in a frames.
h5	HDF5, hierarchical data format 5. Used as one of multi-frame formats.
info	Text file with “[FileInfo]” head and all metadata list (see Frame metadata and his handling methods).
dsc	Text file with frame index first and all metadata list (see Frame metadata and his handling methods).
idx	Binary index for multi-frame files. Usesfull for fast access to n-th frame.

File saving flags summary

File saving flags can do additional settings for file(s) saving.

• Can be used in saving files or in doAdvancedAcquisition python methods, for example.
• Flags can be combined.
• Default frame file settings is set of separate subframes text files, with all pixels include zeros, each subframe with idx+dsc files:

file_ToT.pmf, file_ToT.pmf.dsc, file_ToT.pmf.idx, file_ToA.pmf, file_ToA.pmf.dsc, file_ToA.pmf.idx

File saving flags

Flag constant base name	Description
PX_FRAMESAVE_BINARY	Use binary format in pmf.
PX_FRAMESAVE_SPARSEX	Index + non-zero pixels in file. # separates (sub)frs.
PX_FRAMESAVE_SPARSEXY	X, Y + non-zero pixel in file. # separates (sub)frames.
PX_FRAMESAVE_NODSC	Do not add dsc file.
PX_FRAMESAVE_NOSUBFRAMES	Do not use subframes, save main frame only.
PX_FRAMESAVE_SUBFRAMES_ONEFILE	Save all subframes to a single file.
PX_FRAMESAVE_SUBFRAMES_SAVEMAINFRAME	Save separate all subframes and main frame extra.

File extensions and flags: TXT/PBF/PMF/BMF details

The files formats

txt

Single frame in the text file.

pbf

Pixet Binary Frame - Single frame in the binary file.

pmf

Pixet Multi Frame - Multiframe file with text or binary format, depends on flags used with saving.

bmf

Binary Multi Frame - Multiframe file with binary format, depends on flags used with saving.

idx

Index for seeking - Binary array of 64b pointers to start of frames and subframes.

dsc

Description. List of all metadata for each frame and subframe. Actual device and acquisitionparameters, data types, etc. The "Frame name" item can be helpful to orientation in pmf structure if the ONEFILE flag used. The Type= item is helpful to understanding the structure of data if the BINARY flag used.

Note

All the next examples are for Timepix3, single chip, opm = TPX3_OPM_TOATOT

Multi-files names generation

flags 0 (default), input filename = "name", acqCount = 1

name_ToA.txt, name_ToA.txt.dsc, name_ToT.txt, name_ToT.txt.dsc

acqCount = 6

name_0_ToA.txt, name_0_ToA.txt.dsc, name_0_ToT.txt, ...

...

name_5_ToA.txt, name_5_ToA.txt.dsc, ...

PMF note

With each pmf generating .pmf.idx binary file, other is same as TXT with acqCount = 1.