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Re: Displaying thicker lines on an image [message #76159]

Sun, 22 May 2011 23:56

Bringfried Stecklum is currently offline

Bringfried Stecklum
Messages: 75
Registered: January 1996

Member

wlandsman wrote:
> I have been using edge detection algorithms, so i end up with an image with
> values of 255 on the lines defining the edges, and zeros everywhere else.
> However, when I display the image, the lines don't show up well, so for
> display purposes I want to make the lines thicker. If I had created the
> lines with the PLOT command, I would adjust the THICK keyword. But for an
> image I think I need an algorithm that will identify neighboring pixels to
> the existing lines. Thanks, --Wayne

Dear Wayne,

why don't you just convolve the binary image with a Gaussian kernel of a few
pixels width? You may clip the resulting image at some level chosen to produce
the desired line thickness if it needs to be binary again.

This slight blurring (at the expense of some contrast) is also recommended if
IDL line plots are difficult to discern when presented with a beamer.

Regards, Bringfried

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[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

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