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Re: convert read_bpm(file, R, G, B) to N x M x 3 array? [message #52754]

Thu, 01 March 2007 09:45

Mike[2]
Messages: 99
Registered: December 2005

Member

On Mar 1, 4:04 am, Wox <nom...@hotmail.com> wrote:
> You know you could do this right?
> button=widget_button(base,value=filename,/bitmap)

I know that, but I'm experimenting with converting my bitmaps
to functions that return the bitmaps with the idea that it
might result in more portable code.

> Why not just using this:
> result=read_bmp(filename)
> This will give a 3xNxM, so you can use this to get NxMx3:
> result=transpose(result,[1,2,0])

That doesn't work with all bitmaps. READ_BMP returns an NxM
array for a single channel bitmap.

Mike

IDL> tmp = query_bmp('smaller.bmp', info)
IDL> help, info, /str
** Structure <844d21c>, 7 tags, length=40, data length=36, refs=1:
CHANNELS LONG 1
DIMENSIONS LONG Array[2]
HAS_PALETTE INT 1
NUM_IMAGES LONG 1
IMAGE_INDEX LONG 0
PIXEL_TYPE INT 1
TYPE STRING 'BMP'
IDL> help, read_bmp('smaller.bmp')
<Expression> BYTE = Array[24, 24]

IDL> tmp = query_bmp('alpha_left.bmp', info)
IDL> help, info, /str
** Structure <844bfc4>, 7 tags, length=40, data length=36, refs=1:
CHANNELS LONG 3
DIMENSIONS LONG Array[2]
HAS_PALETTE INT 0
NUM_IMAGES LONG 1
IMAGE_INDEX LONG 0
PIXEL_TYPE INT 1
TYPE STRING 'BMP'
IDL> help, read_bmp('alpha_left.bmp')
<Expression> BYTE = Array[3, 11, 11]

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[Message index]

		Re: convert read_bpm(file, R, G, B) to N x M x 3 array? By: Mike[2] on Thu, 01 March 2007 09:45
		Re: convert read_bpm(file, R, G, B) to N x M x 3 array? By: David Fanning on Thu, 01 March 2007 08:58
		Re: convert read_bpm(file, R, G, B) to N x M x 3 array? By: Mike[2] on Thu, 01 March 2007 08:37
		Re: convert read_bpm(file, R, G, B) to N x M x 3 array? By: Wox on Thu, 01 March 2007 01:04
		Re: convert read_bpm(file, R, G, B) to N x M x 3 array? By: David Fanning on Wed, 28 February 2007 09:45

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