PIL save "F" mode images?

Coding Python Support
1

I’m stuc can someone ‘unstuck’ me please?

While working on some terain generation I want to use an image to store hights. I would like to use Floats for precision, but I can’t how to make PIL (python image library) save “F” mode pictures. Does anyone know how to do this? (prefrably within Blender)

I’m usin Blender 2.41 and python 2.4

cheers Smitje

2

maybe you could use internal blender image capabilities? the new version should have complete floating point support for images.(will be probably in a month)

3

:stuck_out_tongue: jeeeeaaaa!
Imanaged to save a “F” mode file as tif (using python outside Blender)

But when I run the same script in Blender I get an ERROR :x

here is the script:


import Image

size = 65 
aapje = (1.0/3.0)
imgn = Image.new("F",(size, size),aapje)

imgn.save("D:/MCS/HexWrld/tryIm.tif")

and here is the error:


traceback ...
   File "myImage.py", line 7, in ?
   File "c:\Python\lib\site-packages\PILl\image.py", line 1305, in save
      save_handler(self, fp, filename)
   File "c:\Python\lib\site-packages\PILl\TiffImagePlugin.py", line 720, in _save
      ImageFile._save(im, fp, [
   File "c:\Python\lib\site-packages\PILl\ImageFile.py", line 489, in _save
      s = e.encode_to_file(fh, bufsize)
IOError: (0, 'Error')

does anyone know what this means, and if there is a sollution?
cheers Smitje

4

After some more experiments I’ve kind of decided to leave the floats for now because to manny functions in PIL are giving me a hard time over them.

now I am trying to decide weather to

  1. use an “L” mode immage and convert that to float when needed in Blender (e.g by multiplying with a Float) this has the advantage I can give it a sensible unit (meters)
    or
  2. use 2 layers of an “RGBA” mode image. That should give suficient detail, and leave the othes layers for some masking and other calculations (water) but would require a bit more calculation.

I am a bit in favor of the last option

any thoughts any one?
cheers
Smitje