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Re: Array Subscripting Puzzle [message #30779]

Fri, 17 May 2002 14:18

Richard Younger
Messages: 43
Registered: November 2000

Member

I came up with an answer for a [3,800,600] image, but couldn't quite
wrap my head around the [800,600,3], so I swapped:

image = TRANSPOSE(image, [2,0,1])

color_vec = [255,255,0]
mask = [[3*indices], [(3*indices + 1)],[(3*indices + 2)]]
image[mask] = $
REBIN(TRANSPOSE(color_vec), N_ELEMENTS(indices), 3)

It certainly would be uglier if you made it all one line (well, two with
TRANSPOSE). Someone clever could probably swap around the index order
on the image to eliminate that transpose and pretty up the mask
construction, too.

Good Luck,
Rich

--
Richard Younger

David Fanning wrote:
>
> Folks,
>
> I have a 24-bit image. You can interleave it anyway
> you like that will make the problem described below
> trackable. At the moment it is 800 by 600 by 3.

[...]

> That seems wasteful and inelegant. There must be
> a way to do this in one go. I'm sure it uses REBIN
> and REFORM, but I'm not sure in which order. :-(
>
> Can anyone help?
>
> Cheers,
>
> David
>

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[Message index]

		Re: Array Subscripting Puzzle By: Richard Younger on Fri, 17 May 2002 14:18
		Re: Array Subscripting Puzzle By: James Kuyper on Fri, 17 May 2002 12:45
		Re: Array Subscripting Puzzle By: dmarshall on Fri, 17 May 2002 11:57
		Re: Array Subscripting Puzzle By: Liam E. Gumley on Fri, 17 May 2002 11:30
		Re: Array Subscripting Puzzle By: James Kuyper on Fri, 17 May 2002 11:15
		Re: Array Subscripting Puzzle By: JD Smith on Wed, 22 May 2002 14:12

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