Convert bitmap to XYZ table

  • Thread starter Thread starter Filip Kadlec
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Filip Kadlec

Hello,
I am looking for a prog/ utility which would convert a bitmap to
an ASCII file with XYZ values. The bitmap is only grayscale
and represents a spatial profile of some physical quantity; I
would like to convert it to a 3D graph. After conversion, the XYZ
values would be (for each pixels) the coordinates (X,Y) and the
level of gray (Z = 0 .. 255). Thanks in advance for suggestions.

Filip Kadlec
remove the animals from the address for reply
 
Filip said:
Hello,
I am looking for a prog/ utility which would convert a bitmap to
an ASCII file with XYZ values. The bitmap is only grayscale
and represents a spatial profile of some physical quantity; I
would like to convert it to a 3D graph. After conversion, the XYZ
values would be (for each pixels) the coordinates (X,Y) and the
level of gray (Z = 0 .. 255). Thanks in advance for suggestions.

Filip Kadlec
remove the animals from the address for reply
Click to expand...

ImageMagick www.imagemagick.org can be used from the command line, perl,
c, vb, etc.

Here's a command-line example:
convert my_bitmap.bmp -type grayscale gray_values.txt

The output looks something like this:

0,0: 255,255,255 grey100
1,0: 243,243,243 #FEFEFE
2,0: 243,243,243 #FEFEFE
3,0: 122,122,122 #FEFEFE
....

You could pipe the output through awk/gawk if you want to remove the
unused fields.

Andrew Graham
 
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