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Color table question [message #435]

Mon, 10 August 1992 15:38

patel
Messages: 9
Registered: August 1992

Junior Member

In PV-WAVW, I need to display a gray scale image(256 grays). I need
few colors for graphics. I did the following to accomplish this:

loadct,0 ; load a gray scale color table.
; Load the color table with 7 colors.
Tvlct, 140, 140, 140, 1
Tvlct, 130, 140, 220, 2
Tvlct, 90, 80, 160, 3
Tvlct, 255, 255, 255, 4
Tvlct, 200, 200, 60, 5
Tvlct, 50, 170, 80, 6
Tvlct, 200, 70, 70, 7

; Byte scale the image in 'im'
imb=bytscl(im)
;to avoid funny colors in the image, set all pixels with value <10 to 10
imb(where(imb lt 10))=10
tvscl,imb
end

with this segment of the program, I donot expect to see any colors
in my image. But I do see scattered pixels with different colors.
What am I doing wrong here.
Thanks for your help.

Maqbool Patel
patel@hippy.drad.umn.edu

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[Message index]

		Color table question By: patel on Mon, 10 August 1992 15:38
		Re: Color table question By: thompson on Mon, 10 August 1992 16:59
		Re: color table question By: R.Bauer on Sat, 16 March 2002 12:19
		Re: color table question By: David Fanning on Fri, 15 March 2002 17:19
		Re: color table question By: Rick Towler on Thu, 14 March 2002 10:58

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