comp.lang.idl-pvwave archive: archive » Re: Displaying thicker lines on an image

Home » Public Forums » archive » Re: Displaying thicker lines on an image

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Displaying thicker lines on an image [message #76219 is a reply to message #76159]

Tue, 24 May 2011 07:59

wlandsman
Messages: 743
Registered: June 2000

Senior Member

Thanks David and Bringfried,

Both dilation with a cross and Gaussian smoothing work fine, though the dilation is definitely quicker.

Incidentally, I tried out the new GAUSS_SMOOTH() function introduced in IDL 8.1. (It simply computes a Gaussian kernel and applies the CONVOL function.) I was annoyed to discover that it does nothing to integer images, though no warning is given. The reason is that the kernel data type is forced to match that of the image, and the Gaussian kernel is created with a peak value of 1, so all other kernel pixels are truncated to zero.

Instead, GAUSS_SMOOTH() should convert the input integer data to float, apply the smoothing, and then round back to integer. --Wayne

Report message to a moderator

[Message index]

		Re: Displaying thicker lines on an image By: Bringfried Stecklum on Sun, 22 May 2011 23:56
		Re: Displaying thicker lines on an image By: David Fanning on Sat, 21 May 2011 06:49
		Re: Displaying thicker lines on an image By: David Fanning on Sat, 21 May 2011 06:40
		Re: Displaying thicker lines on an image By: wlandsman on Tue, 24 May 2011 07:59

Previous Topic:	Success!! Add and manipulate a visualization in standard iTool - Part II
Next Topic:	Re: Log-scaled colorbar example

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Thu Oct 16 21:10:33 PDT 2025

Total time taken to generate the page: 2.08287 seconds