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Re: 8 to 24 bit conversion [message #41683 is a reply to message #41679]

Tue, 09 November 2004 15:49

Robert Barnett
Messages: 70
Registered: May 2004

Member

Sorry I didn't press refresh on the newsgroup
How about this.

erase
; Load the color table (blue)
loadct, 2
; Draw something at x=0, y=0
tvscl, dist(100)
; Read the entire screen
image = tvrd()
; Read the look up table
tvlct, red, green, blue, /get
; Get the size of the snapshot of the screen
size = size(image)
; Assign a rgb image
rgb = bytarr(3,size[1],size[2])
; Fill in each channel based on the byte value of the image
rgb[0,*,*] = red[image]
rgb[2,*,*] = blue[image]
rgb[1,*,*] = green[image]
; Load a BW color table
loadct, 0
; Display each channel
tvscl, rgb, /true
;tvscl, rgb[0,0:100,0:100], 0 ; Red
;tvscl, rgb[1,0:100,0:100], 1 ; Green
;tvscl, rgb[2,0:100,0:100], 2 ; Blue

For some reason I have to swap the blue and green positions.

--

nrb@
Robbie Barnett
imag
Research Assistant
wsahs
Nuclear Medicine & Ultrasound
nsw
Westmead Hospital
gov
Sydney Australia
au
+61 2 9845 7223

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[Message index]

		Re: 8 to 24 bit conversion By: David Fanning on Wed, 10 November 2004 06:10
		Re: 8 to 24 bit conversion By: KM on Wed, 10 November 2004 05:45
		Re: 8 to 24 bit conversion By: David Fanning on Tue, 09 November 2004 23:04
		Re: 8 to 24 bit conversion By: Robert Barnett on Tue, 09 November 2004 22:27
		Re: 8 to 24 bit conversion By: KM on Tue, 09 November 2004 18:26
		Re: 8 to 24 bit conversion By: KM on Tue, 09 November 2004 18:17
		Re: 8 to 24 bit conversion By: Robert Barnett on Tue, 09 November 2004 15:49
		Re: 8 to 24 bit conversion By: Robert Barnett on Tue, 09 November 2004 15:36
		Re: 8 to 24 bit conversion By: KM on Tue, 09 November 2004 15:21
		Re: 8 to 24 bit conversion By: Liam Gumley on Tue, 09 November 2004 14:49
		Re: 8 to 24 bit conversion By: Liam Gumley on Tue, 09 November 2004 14:40

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