comp.lang.idl-pvwave archive: archive » How to display an image (tvscl, shade

Home » Public Forums » archive » How to display an image (tvscl, shade_surf, etc.) with values cut-off

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

Re: How to display an image (tvscl, shade_surf, etc.) with values cut-off [message #88758 is a reply to message #88756]

Sun, 15 June 2014 09:45

Phillip Bitzer
Messages: 223
Registered: June 2006

Senior Member

On Friday, June 13, 2014 4:52:42 PM UTC-5, bio_guy wrote:
> I have an array (2D image) with value say in the range 0..255.
>
> I want to display the array as an image with a color range, say A..B (based on a given loaded color table.
>
>
>
> My goal: any value below 10 is considered as 10, and any value above 100 is considered as 100. So, I want to display such image.
>

In your favorite plotting function, use the min/ma operators. For example,

cgImage, 10 > img < 100

This does not do any scaling - it simply clamps the min/max value to 10 and 100, respectively.

But, this is the explicit way. You may also want to check all the various keywords available. For example, the function IMAGE() has, specifically, min and max value keywords. But, I think (maybe) that will also the scale the data.

Report message to a moderator

[Message index]

		How to display an image (tvscl, shade_surf, etc.) with values cut-off By: bio_amateur on Fri, 13 June 2014 14:52
		Re: How to display an image (tvscl, shade_surf, etc.) with values cut-off By: Phillip Bitzer on Sun, 15 June 2014 09:45

Previous Topic:	Possible to create 'keyword_used' type function?
Next Topic:	Udpate plot() range when drawing a polygon()

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 18:24:28 PDT 2025

Total time taken to generate the page: 0.00217 seconds