redux display quality - Githubissues

leginonbot commented 6 months ago

Author Name: Jim Pulokas (Jim Pulokas) Original Redmine Issue: 2059, https://emg.nysbc.org/redmine/issues/2059 Original Date: 2012-09-21

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, smoot### 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)

leginonbot commented 6 months ago

Original Redmine Comment Author Name: Gabriel Lander (@gclander) Original Date: 2012-09-21T20:47:30Z

This can be fixed by setting the std to 5 by default instead of 3 in viewer.inc: $this->autoscale = "s;5";

leginonbot commented 6 months ago

Original Redmine Comment Author Name: Jim Pulokas (Jim Pulokas) Original Date: 2012-09-25T15:51:18Z

default contrast setting (3 -> 5) has been committed in r17132

leginonbot commented 6 months ago

Original Redmine Comment Author Name: Anchi Cheng (@anchi2c) Original Date: 2012-10-18T22:07:03Z

r17199 change more defaults in 2.2-redux. These affect the makejpg.php caching and download images.

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