Appion

consolidating several similar issues...

Images generated by redux do not have the same quality as phpmrc

A number of reasons for this:

• order of operations: whether contrast scaling is done before or after resizing the image makes a difference. weather resizing is done before or after the fft makes a difference
• method of resizing the image makes a difference. phpmrc did binning, which has the desired side effect of low pass filtering. redux does both resampling using scipy and binning.
• phpmrc did a mysterious low pass filtering which could be set to default, smooth1, smooth2, smooth3. Need to reproduce that, particularly the default, since that was probably the only one ever used.
• users need good default settings and online help to learn how to adjust the display using redux (adjust.php needs overhaul)