redux¶

redux is a library for loading an image, doing some basic processing and generating a viewable image.

Goals¶

• simple to use python library
• simple to use network daemon that can answer requests for an image and the pipeline of processing to do on it
• simple to use command line client that uses either the network daemon or locally imported python library to do processing
• complex behind-the-scenes result caching

Potential uses¶

• a command line program like xv or imagemagick to view myami images and generate publication quality results
• preparing image for display in Leginon, including contrast adjustments, binning, power spectrum, etc
• any functions in leginon/appion where you need to either bin or calculate power spectrum
• preparing image for display on web pages. web server can contact redux server. this can replace php-mrc module which no longer compiles with php > 5.2

Current design as of 5/12/2011¶

New Ideas as of 7/13/2011¶

Investigating gstreamer as a framework on which to build redux. gstreamer allows plugins called "elements" to be connected together to form a pipeline or graph that does multimedia processing. Here is an example application built using the command line program "gst-launch":

gst-launch filesrc location=example.png ! pngdec ! jpegenc ! filesink location=test.jpg

README file:¶

INTRODUCTION
Redux is a utility for running a pipeline of simple image processing routines.
The main purpose is to produce display worthy images (JPEG, PNG, etc) from
raw MRC images.  It includes a caching mechanism to reduce processing time at
the expence of disk or memory usage.

INSTALL:
prerequisites: python2.6 and above, numpy, scipy, pyfilesystem, pyami, numextension, gdbm,fftw3
    Install using "python setup.py install" or just use a local sandbox and just
make sure redux is in your pythonpath

[[Using Redux to serve images on myamiweb]]

USING IT:
There are two basic ways to use redux.  The first is to use it directly as a
python package.  You import redux and do processing in your python script.
The second is to start a redux server, which can be located elsewhere on your
network.  You then make requests to the server using the client of your choice
(python, php, etc.).

TRY IT:
    Run the stand-alone redux script (bin/redux).  Without any options or
arguments, it will print out a help message.

To Do:
    cache management, clean up old files, etc.
    server and client config scripts
    security