1 ========================
2 ALE version 0.8.3 README
3 ========================
5 This README discusses downloading, extraction, and compilation of ALE.
6 Documentation about the command-line interface and program options can be found
7 on the ALE web site; see the end of the README for relevant URLs.
14 + Compiling from source
17 - Extraction and Building
20 - Color Data Precision
21 - Coordinate Data Precision
26 + Further Documentation
38 http://auricle.dyndns.org/ALE/download/ale-0_8_3-win32.zip
44 The zip file available at the above URL is an archive containing the ALE
45 executable; a zip archival utility can be used to extract the executable from
48 Once extracted, since ALE is a command-line program, it may be necessary to
49 open a command prompt window to use ALE successfully. For more information
50 about command-line usage and options, see the User Manual at the URL given at
51 the bottom of this file.
53 Note that the Windows binaries available on the ALE website read and write only
54 PPM-formatted image files. However, separate conversion tools can be used to
55 convert between other formats and PPM (e.g. ImageMagick's command-line
56 utilities, available from http://www.imagemagick.org/ ).
66 http://auricle.dyndns.org/ALE/download/ale-0.8.3.tar.gz
72 GCC version 3.2.3 with C++ support and GNU Make 3.80 are known to build ALE
73 successfully. Older versions of GCC may fail to compile some versions of ALE.
76 Extraction and Installation
77 ---------------------------
79 Download the source archive file from the URL indicated above, and invoke:
81 tar xzf ale-0.8.3.tar.gz
85 where the text '[OPTIONS]' is replaced by zero or more of the compilation
86 options listed below. (The makefile may need to be modified for successful
87 compilation on Windows systems.)
93 All compilation options are of the form OPTION=VALUE. Default options are
100 Enabling ImageMagick support allows ALE to make use of the file-handling
101 capabilities of ImageMagick ( http://imagemagick.org/ ). This includes reading
102 and writing a variety of file formats, including, among many others, PNG and
103 JPEG (two formats commonly used in web publishing) as well as common
104 interchange formats such as PPM and TIFF. ImageMagick 6.0.6 is known to work
105 with this version of ALE; certain older versions of ImageMagick may cause
106 compile, link, or runtime errors.
108 IMAGEMAGICK=0 * Disable ImageMagick support.
109 IMAGEMAGICK=1 Enable ImageMagick support.
115 ALE's internal data structures store each color channel within a pixel as
116 floating-point data; similarly, arithmetic operations on color channels are
117 performed in floating point. The three available data-type configurations are
118 listed below, with typical data sizes indicated in parentheses. Note that the
119 required runtime for COLORS=HALF configurations can be several times that of
120 COLORS=SINGLE configurations.
123 ------------------- -------------------
124 COLORS=SINGLE * C++ float (32-bit) C++ float (32-bit)
125 COLORS=DOUBLE C++ double (64-bit) C++ double (64-bit)
126 COLORS=HALF Custom (16-bit) C++ float (32-bit)
128 Note: COLORS=HALF can be very computationally expensive.
131 Coordinate Data Precision
132 -------------------------
134 In general, coordinate transformations used by ALE produce results outside of
135 the set of integers; hence, coordinates are treated as floating-point data.
136 The two available data-type configurations are listed below, with typical data
137 sizes indicated in parentheses.
139 COORDINATES=SINGLE * C++ float (32-bit)
140 COORDINATES=DOUBLE C++ double (64-bit)
146 For Irani-Peleg rendering, ALE computes a discrete Fourier transform of the
147 estimated point-spread function. Since the area in which an estimated
148 point-spread function is non-zero is usually much smaller than the size of an
149 input frame, the efficiency of this operation is unlikely to be important.
150 Hence, ALE uses a relatively inefficient built-in transform by default. To use
151 FFTW instead of the built-in transform, specify FFTW=1. This option requires
152 FFTW version 3 libraries and header files to be installed. For more details on
153 FFTW, see http://fftw.org/
155 This build option is required in order to use the --fl option.
157 FFTW=0 * Use a built-in discrete Fourier transform.
158 FFTW=1 Use the FFTW3 discrete Fourier transform.
164 This build option is required in order to use the --wmx option. If
165 POSIX=1 is specified, it is expected that fork() and execlp() calls
168 POSIX=0 Do not use POSIX fork() and execlp()
169 POSIX=1 * Use POSIX fork() and execlp()
175 This build option is required to obtain additional output from --ui=tty. If
176 TIOCGWINSZ is not defined in <sys/ioctl.h>, however, additional output will not
177 be provided even if IOCTL=1 is specified at build time.
179 IOCTL=0 * Do not use ioctl()
186 Finding bugs within ALE, or within custom modifications to ALE, can be
187 simplified by enabling run-time assertions. These checks enforce conditions
188 believed to be necessary or desirable for correct program operation. If a
189 condition is not satisfied, ALE will abort and display a message indicating the
192 DEBUG=0 * Disable assertions.
193 DEBUG=1 Enable assertions.
196 Further Documentation
197 =====================
199 For information about command-line usage and program options, see the on-line
200 user manual, available at the URL indicated in the next section. A technical
201 description of ALE operation is also available.
207 Home Page http://auricle.dyndns.org/ALE/
208 User Manual http://auricle.dyndns.org/ALE/user/
209 Technical Description http://auricle.dyndns.org/ALE/tech/
210 Mailing list archive http://ventricle.dyndns.org/pipermail/ale/
216 Bug reports, feature requests, patch and release announcements, and related
217 discussion can be sent to ale@ventricle.dyndns.org. Archives of past postings
218 and subscription information are available at the URLs indicated below.
220 Posting address ale@ventricle.dyndns.org
221 Subscription info http://ventricle.dyndns.org/cgi-bin/mailman/listinfo/ale
222 Archives http://ventricle.dyndns.org/pipermail/ale/