Re: Image -> ASCII conversion : Help Wanted

hi, i am a little bit tired already, so my reply
will just be my tonight's "brain noise"...

Trav schrieb:
> 
> Greetings,
> 
> I have a simple 3 colour image (white, blue, black) that is 2000x2000
> pixels in size. It is a
> grid, where the gridlines are black, and squares are either filled with
> white or blue.  It is
> derived from making a layer in a Photoshop image and then just copying
> the contents of
> the layer into a new file, so it can be any format that Photoshop 5.0
> can save in, in case the
> file type is of great importance.
> 
> What I want to do is to find out the information for each x,y coordinate
> and import that
> information into a spreadsheet, like Excel. For example, let's say that
> the x,y = 200, 400
> (ie: the pixel is located 200 pixels across from the left, and 400 up
> from the bottom of the
> image).
> 
> If that pixel is black, I want to be able to convert that information so
> that I can read it in
> Excel. I don't care whether it is defined as white = 1, black = 2, blue
> =3, or whether it is
> defined as white = FFFFFF, black = 000000, blue = 0000FF, or whether it
> is defined as
> white = 255-255-255, black = 0-0-0, blue = 0-0-255. or any symbols, so
> long as I can differentiate between the tree tones.   I can use Excel to
> extract the
> information I need.
> 
> According to the Photoshop help files, the RAW format should be the one
> I use, but I am
> having problems with it.  Every time I save the file in RAW format and
> try to open it with Excel, I just get the same character (a "y" with two
> dots above it (umlaut?)) about 200 times, with no spaces between
> characters.

the y with two dots above is no umlaut, it is a trema sort of thing
(like the i with two dots above). the symbol you mean just
happens to have the ascii-ordinal of 255 (or $FF), so could it be that
these are just the "white" bytes (actually three of them for one pixel
if your image is in 24bit truecolor ? try to convert it to a "palette
indexed"
color mode (i.e. 256 or 16 colors) and dump it then to a RAW file.
Another thing might be that excel cannot handle characters with an
ascii value lower that 32, since there are non-printable characters.
try to set the colors in a manner so that all bytes on the output
are between 32 and 128, that should work.

> My next thought was that perhaps a program that took an image and
> converted it to ASCII art might solve the problem.  I've done a search,
> but found nothing out there able to handle images that are 2000x2000
> pixels.
> 
> Can anyone help me to locate software which might be of use?  You can
> either reply here, or directly to me via t.c...@landfood.unimelb.edu.au
> 
> Thanks in advance,
> 
> Trav.

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