comp.lang.idl-pvwave archive: archive » extracting pixel coordinates

Home » Public Forums » archive » extracting pixel coordinates

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

Re: extracting pixel coordinates [message #94491 is a reply to message #94489]

Mon, 12 June 2017 05:19

natha
Messages: 482
Registered: October 2007

Senior Member

On Monday, June 12, 2017 at 7:10:47 AM UTC-4, sid wrote:
> Hi all,
> I have a 1000 by 1000 pixel array, I need to extract a 1D column
> whose start point is (401,642)
> and end point is (411,750)
> anybody have some idea on this.
> thanks

I am not sure what do you want. If you want to select the values from the start point to the end point (straight line) you could try this:

xsel=[401:642]
ysel=[411:750]

The problem here is that the selecttion on X does not have the same number of elements as Y, you should therefore interpolate:

xsel=congrid(xsel,n_elements(ysel),/int,/center,/minus_one)

And the result would be:

result=you_array(xsel,ysel)

Report message to a moderator

[Message index]

		extracting pixel coordinates By: gunvicsin11 on Mon, 12 June 2017 04:10
		Re: extracting pixel coordinates By: Matthew Argall on Mon, 12 June 2017 05:12
		Re: extracting pixel coordinates By: natha on Mon, 12 June 2017 05:19
		Re: extracting pixel coordinates By: Helder Marchetto on Mon, 12 June 2017 08:16

Previous Topic:	Define a region between curves
Next Topic:	Download previous versions of IDL

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 19:03:01 PDT 2025

Total time taken to generate the page: 0.00461 seconds