taskGNU Astronomy Utilities - Tasks: task #14365, Allow the user to input fractions...


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task #14365: Allow the user to input fractions as a scaling value to ImageWarp

Submitter:  Lee Kelvin <leeskelvin>
Submitted:  Wed 08 Feb 2017 08:32:28 PM UTC
Should Start On:  Wed 08 Feb 2017 12:00:00 AM UTC Should be Finished on:  Wed 08 Feb 2017 12:00:00 AM UTC
Category:  Warp Priority:  5 - Normal
Item Group:  Enhancement Status:  None
Privacy:  Public Percent Complete:  100%
Assigned to:  makhlaghi Open/Closed:  Closed
Effort:  0.00

Mon 13 Feb 2017 11:11:50 PM UTC, comment #3: 

All the modular warpings and the matrix elements now allow fractions. This has been applied and pushed to my development branch as part of task #14245.

Mohammad Akhlaghi <makhlaghi>
Group administrator
Fri 10 Feb 2017 01:40:54 PM UTC, comment #2: 

As part of task #14245, I am now working on porting ImageWarp to the new infra-structure. In the main-time, I will also complete this great suggestion ;-).

Mohammad Akhlaghi <makhlaghi>
Group administrator
Thu 09 Feb 2017 02:30:53 AM UTC, comment #1: 

This is another great feature suggestion, which can be extremely useful!

It is easy to implement, but I can't do it immediately. So if anyone is interested, please post a comment here, and I would be happy to help.

Thanks again Lee, for the great suggestions ;-).

Mohammad Akhlaghi <makhlaghi>
Group administrator
Wed 08 Feb 2017 08:32:28 PM UTC, original submission:  

If I want to scale a 3x3 pixel image up to 8x8 pixels, the correct scaling value is 2.6 recurring (8/3). This value will always be an approximation; it is impossible for me to express the correct scaling accurately.

I propose to allow the user to specify scaling values using fractional notation. For example, to scale an image from 3x3 pixels to 8x8 I could use the command:

astimgwarp --scale=8/3 input.fits

Lee Kelvin

Lee Kelvin <leeskelvin>
Group Member


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    Follow 4 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2017-02-13 makhlaghi Percent Complete10% 100%
        Open/ClosedOpen Closed
    2017-02-10 makhlaghi Percent Complete0% 10%
        Assigned toNone makhlaghi

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