[Bug-ocrad] Ocrad cannot recognize text in png format file

[Tryjarski Jerzy]

Hi,

I'm beginner user of ocrad.

Ocrad cannot recognize text in png format file.

The text in png file is as follows:

        Filesystem           1K-blocks      Used Available Use% Mounted on

The result of invoking command: 

        pngtopnm filename.png | ocrad

is the following:
 
        |_n__|_n_ O___oO -_ o_


Can you tell me how I need to "force" ocrad to proper recognize text which is 
"coded" in my png file.

Jerzy