How to get intermediate result of tesseract? Like processed image as output.

[Gautam Navapara]

I started working on tesseract few days back. I want to improve it's accuracy. Some times it doesn't recognize characters. So, i'm starting from first step. I want to see processed Image at each and every stage. How can i achieve this?

[Quan Nguyen]

Check the API Examples. You can call GetThresholdedImage after SetImage to return the Pix object of your interest, and call Leptonica's pixWrite method to save it to an image file on your filesystem for your viewing.

https://github.com/tesseract-ocr/tesseract/wiki/APIExample

https://zdenop.github.io/tesseract-doc/group___advanced_a_p_i.html

[Gautam Navapara]

Thank you. It really helped me.

[Gautam Navapara]

How can I use GetRegions() function? What should be argument for it? After calling GetRegions() function which function should I use to get page layout image as output?

[Quan Nguyen]

RTD. You can pass in a null and get an array of Box objects in return.

[Gautam Navapara]

I got arrays of box object. after that i called function 'boxawrite' that function created txt file with cordinates of box. How this cordinates are useful? I want output as image. like i attached one here. how to get that kind of image. maybe this is very easy but I'm newbie, please help.

[Quan Nguyen]

You'll need to programmatically draw rectangles having those coordinates on the image.

[Tom Morris]

Rather than rolling your own, I'd suggest looking at the ScrollView app to see if it has the information that you need:

https://github.com/tesseract-ocr/tesseract/wiki/ViewerDebugging

Tom

[Gautam Navapara]

Hello Tom, I tried that ScrollView app but nothing happens.  waiting for server... waiting for server... it's like it goes in infinity loop.  
can you suggest solution for it?

[Tom Morris]

That typically means that it can't find or run ScrollView. Did you follow all the directions on the wiki page including building the jar, copying the dependencies, setting the environment variable, etc?

You can avoid setting the environment variable by running tesseract directly from the ScrollView directory. This command sequence should work:

cd tesseract

make ScrollView.jar

cd java

tesseract ../testing/phototest.tif test1 segdemo inter

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[Gautam Navapara]

make is linux command. I'm using windows10. what is equivalent command in windows? 

[Tom Morris]

On Mon, Jun 27, 2016 at 5:56 AM, Gautam Navapara <gbnav...@gmail.com> wrote:

make is linux command. I'm using windows10. what is equivalent command in windows? 

Depends on your tool chain. For Cygwin/Mingw, it still might be `make`. See the wiki instructions here: https://github.com/tesseract-ocr/tesseract/wiki/Compiling#windows

Note that some of the rarer build environments might not include the ScrollView target, but if yours doesn't, you can copy/adapt the instructions from the Linux makefile. It's basically just Java compilation and building of a JAR.

Tom

 

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