"Johnson Lau" on wrote...
| Dear all,
|
| I need to convert some black and white TIFF images into a matrix of 1s and 0s.
|
| For example, there is a black and white TIFF with 4x4 pixels (a square
| represents a pixel):
|
| http://www.comminn.net/ftp/4x4.JPG
|
| I would like to convert it into a plaintext matrix like this:
|
| 0011
| 1001
| 1101
| 1110
|
| Could imagemagick help? Or I need other software? Thanks for your help!
|
Yes, very much!!! It is just a matter of finding the right image format
that is close to what you want!
Convert the image to a a PBM format but without the binary compression!
that is as a text bitmap
For example....
convert bitmap_image.gif -compress None bitmap.pbm
and you get...
P1
4 4
1 1 0 0 0 1 1 0 0 0 1 0 0 0 0 1
however the PbmPlus library binary to text converter, will format
it slightly better....
convert bitmap_image.gif PBM:- | pnmnoraw > bitmap.pbm
and you get...
P1
4 4
1100
0110
0010
0001
Now just strip the first two lines and you have your bitmap text array
WARNING: JPEG is a lossy format and when reading you will get some grey
values. It may be a good idea to do a -threshold 50% in the "convert"
command to ensure it outputs a true bitmap.
Anthony Thyssen ( System Programmer ) <[EMAIL PROTECTED]>
-----------------------------------------------------------------------------
Rose: "Stairs, thats more like it! It hasn't got legs." ....
Dalek: "Elevate!" -- Dr Who 2007, "Dalek"
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Anthony's Home is his Castle http://www.cit.gu.edu.au/~anthony/
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