Optimal settings to read a floorplan diagram

[Jeremy Colton]

Hi,

I am using:

tesseract 3.03

 leptonica-1.70

  libgif 4.1.6(?) : libjpeg 8d : libpng 1.2.50 : libtiff 4.0.3 : zlib 1.2.8 : webp 0.4.0

I run:

tesseract my-image.png out digits

It provides an empty out.txt file with lots of blank lines!

My image is a coloured floorplan with numbers identifying rooms.  The numbers are not in a line, but effectively scattered throughout the page.  I need to read the numbers and get their (x,y) co-ordinates.

From what I've found, I think I need:

1. To remove any graphics from the plan and just leave the numbers.  

2. The colours should only be black and white.

3. It should be a .png or a .tif, which is better?

4. Minimal resolution is 300x300dpi.

What else?

Many thanks

Jeremy