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Bug #1588

closed

Cronus3 and Longboard not displaying images the same way

Added by Joel Quispe over 12 years ago. Updated about 12 years ago.

Status:
Duplicate
Priority:
Normal
Assignee:
Category:
Web Image Viewer
Target version:
-
Start date:
03/14/2012
Due date:
% Done:

0%

Estimated time:
Affected Version:
Appion/Leginon 2.2.0
Show in known bugs:
No
Workaround:

Description

Cronus3 and Longboard are not displaying the images in the same manner. On cronus3 the images have more contrast.


Related issues 1 (1 open0 closed)

Is duplicate of Appion - Bug #2059: redux display qualityNew09/21/2012

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Actions #1

Updated by Anchi Cheng over 12 years ago

  • Affected Version changed from Appion/Leginon 2.1.0 to Appion/Leginon 2.2.0 (trunk)

redux and php-mrc do not handle image scaling in the same way. I discussed this point with Bridget early on in the implementation of redux for web server. Her point of view is there is no need to make them exactly the same. Please let me know of a specific page or function that the new behavior is not acceptable.

I've known one already: Atlas view scaling from redux is on individual image while php-mrc is on the whole.

Below is more a technical explanation of the difference.
php-mrc does two dimension scaling. First time to a smaller size for the speed of processing which you specify in the "Adjust" window. Second time to fit into the display area of the web page. The intensity scaling is done between the two dimension scaling. Since scaling/binning introduce a filtering effect just by averaging numbers of pixels, the standard deviation in the image statistics is different from the original. Redux scale dimension only once, and does the intensity scale on the scaled dimension. I made redux to scale according to the original statistics but could not reproduce the php-mrc behavior that way.

Actions #2

Updated by Jim Pulokas about 12 years ago

  • Status changed from New to Duplicate
  • Affected Version changed from Appion/Leginon 2.2.0 (trunk) to Appion/Leginon 2.2.0
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