comp.lang.idl-pvwave archive: archive » graphic functions

Home » Public Forums » archive » graphic functions - CopyWindow()

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

graphic functions - CopyWindow() [message #94794]

Mon, 16 October 2017 05:31

Markus Schmassmann
Messages: 129
Registered: April 2016

Senior Member

Hi,

as illustrated in the code below, when I make a plot in direct graphics
all the pixels have either the background color or the plotted color,
but when I use graphic functions and then retrieve the screen with
COPYWINDOW() the colors of the pixels are all over the greyscale.
Setting antiAlias=0 doesn't help either.

Is there a way to retrieve a graphic function screen without expanding
the colortable beyond what originally went into it for plotting?

I hope that by reducing the colortable I can reduce the file size of a
video I create using the COPYWINDOW() method.

Thanks for any help,
Markus

p=plot(/test)
hfg =histogram(p.CopyWindow())
hfg2=histogram(p.CopyWindow(antiAlias=0))
device,decomposed=1
plot, hfg>.2,/ylog,background='FFFFFF'x,color=0
oplot, hfg2>.2,color=0
hdg=histogram(tvrd())
print, [hdg[[0,255]],total(hdg[1:254],/int)]

Report message to a moderator

[Message index]

		graphic functions - CopyWindow() By: Markus Schmassmann on Mon, 16 October 2017 05:31
		Re: graphic functions - CopyWindow() By: wlandsman on Mon, 16 October 2017 08:51

Previous Topic:	extract circle from data with idl
Next Topic:	Map projection of IMAGE() is behaving strangely...

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 07:17:24 PDT 2025

Total time taken to generate the page: 0.00456 seconds