slowrx/README.md

slowrx
========

A shortwave listener's linux tool for decoding analogue [SSTV](http://en.wikipedia.org/wiki/Slow-scan%20television) images received through the sound card. Aims for simplicity and lack of features not needed by the SWL.

Features
--------

* Supports a multitude of modes (see `modespec.c` for a list)
* Automatic frequency shifting
* Slant correction using Hough transform
* Noise reduction using adaptive windowing
* Saves received pictures as PNG along with the corresponding raw signals

Libraries
---------

* ALSA
* GTK+ 3.x
* FFTW 3.x
* pnglite

References
----------

The program is based on several articles:

* Cordesses L, Cordesses R (F2DC) (May 2003). ["Some thoughts on 'Real-Time' SSTV Processing"](http://lionel.cordesses.free.fr/gpages/Cordesses.pdf). *QEX* May/June 2003: 3-20.
* Barber, JL (N7CXI) (May 2000). ["Proposal for SSTV Mode Specifications"](http://www.barberdsp.com/files/Dayton%20Paper.pdf). Presented at the Dayton SSTV forum, 20 May 2000.
* Jones, D (KB4YZ) (Feb 1998). ["List of SSTV Modes with VIS Codes"](http://www.tima.com/~djones/vis.txt).
* Jones, D (KB4YZ) (May 1999). ["List of SSTV Modes with Line Timing"](http://www.tima.com/~djones/line.txt).
* Gasior M, Gonzalez J L (May 2004). ["Improving FFT Frequency Measurement Resolution by Parabolic and Gaussian Spectrum Interpolation"](http://cdsweb.cern.ch/record/738182/files/ab-2004-023.pdf). *AIP Conf. Proc.* (Geneva: CERN) **732** (2004): 276-285.

Licensing
---------

    Copyright (c) 2007-2011, windytan (OH2-250)
    
    Permission to use, copy, modify, and/or distribute this software for any
    purpose with or without fee is hereby granted, provided that the above
    copyright notice and this permission notice appear in all copies.

    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
    ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
markup readme 2011-07-25 10:42:27 +00:00			`slowrx`
			`========`

readme update 2011-08-10 20:46:02 +00:00			`A shortwave listener's linux tool for decoding analogue [SSTV](http://en.wikipedia.org/wiki/Slow-scan%20television) images received through the sound card. Aims for simplicity and lack of features not needed by the SWL.`
markup readme 2011-07-25 10:42:27 +00:00
			`Features`
			`--------`

			* Supports a multitude of modes (see `modespec.c` for a list)
bigger gtkimage 2011-07-29 13:01:30 +00:00			`* Automatic frequency shifting`
			`* Slant correction using Hough transform`
			`* Noise reduction using adaptive windowing`
markup readme 2011-07-25 10:42:27 +00:00			`* Saves received pictures as PNG along with the corresponding raw signals`

move from SoX pipe to alsa libs 2011-07-29 20:09:42 +00:00			`Libraries`
			`---------`

			`* ALSA`
untested GTK3 stuff 2011-07-30 15:24:14 +00:00			`* GTK+ 3.x`
move from SoX pipe to alsa libs 2011-07-29 20:09:42 +00:00			`* FFTW 3.x`
			`* pnglite`

markup readme 2011-07-25 10:42:27 +00:00			`References`
			`----------`

			`The program is based on several articles:`
list fix 2011-07-25 10:45:20 +00:00
markup readme 2011-07-25 10:42:27 +00:00			`* Cordesses L, Cordesses R (F2DC) (May 2003). ["Some thoughts on 'Real-Time' SSTV Processing"](http://lionel.cordesses.free.fr/gpages/Cordesses.pdf). QEX May/June 2003: 3-20.`
			`* Barber, JL (N7CXI) (May 2000). ["Proposal for SSTV Mode Specifications"](http://www.barberdsp.com/files/Dayton%20Paper.pdf). Presented at the Dayton SSTV forum, 20 May 2000.`
			`* Jones, D (KB4YZ) (Feb 1998). ["List of SSTV Modes with VIS Codes"](http://www.tima.com/~djones/vis.txt).`
			`* Jones, D (KB4YZ) (May 1999). ["List of SSTV Modes with Line Timing"](http://www.tima.com/~djones/line.txt).`
remove test ogg from code 2011-07-25 10:49:07 +00:00			`* Gasior M, Gonzalez J L (May 2004). ["Improving FFT Frequency Measurement Resolution by Parabolic and Gaussian Spectrum Interpolation"](http://cdsweb.cern.ch/record/738182/files/ab-2004-023.pdf). AIP Conf. Proc. (Geneva: CERN) 732 (2004): 276-285.`
markup readme 2011-07-25 10:42:27 +00:00
			`Licensing`
			`---------`

sync improvements 2011-07-28 12:45:37 +00:00			`Copyright (c) 2007-2011, windytan (OH2-250)`
markup readme 2011-07-25 10:42:27 +00:00
			`Permission to use, copy, modify, and/or distribute this software for any`
			`purpose with or without fee is hereby granted, provided that the above`
			`copyright notice and this permission notice appear in all copies.`

			`THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES`
			`WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF`
			`MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR`
			`ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES`
			`WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN`
			`ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF`
			`OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.`