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Re: How to determine the mask portion (or unwanted region) from an image and rotate for direction correction using IDL tools? [message #86925 is a reply to message #86924]

Fri, 13 December 2013 07:02

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Madhavan Bomidi writes:

> I have a picture from sky imager which is direction corrected (i.e., N-S or E-W are not exactly top-bottom or right-left directions of the image!!!). The sky imager provides the hemispheric view of our sky and the image is framed in a circular disk. But there is some unwanted portion of the edges and the image is saved in as usual case of rectangular/ square type picture. I wanted to remove the unwanted portion (i.e., masking) and obtain only the circular portion of the
image. Then basing on the solar position seen on the image, automatic rotation shall be applied to correct the image to the correct directions. I know how to do this manually for one single image ... but I have enumerable images. Can anyone suggest me if this is possible with IDL???

As far as I know, this is the purpose of FOR loops. ;-)

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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[Message index]

		How to determine the mask portion (or unwanted region) from an image and rotate for direction correction using IDL tools? By: atmospheric physics on Fri, 13 December 2013 07:00
		Re: How to determine the mask portion (or unwanted region) from an image and rotate for direction correction using IDL tools? By: David Fanning on Fri, 13 December 2013 07:02
		Re: How to determine the mask portion (or unwanted region) from an image and rotate for direction correction using IDL tools? By: atmospheric physics on Fri, 13 December 2013 07:36
		Re: How to determine the mask portion (or unwanted region) from an image and rotate for direction correction using IDL tools? By: David Fanning on Fri, 13 December 2013 08:15

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