Getting a blank tessinput.tif file

[Ashish Goel]

Hello All,

I am trying to do OCR on a bunch of images. Getting some failures, and I want to analyse them.
So, to do that, I am trying to get the tessinput.tif file so that I can find out what input actually goes to tesseract.

I am passing "-c tessedit_write_images 1" along with my tesseract to generate the tessinput.tif file.
Tesseract does generates the tessinput file, but the file is blank (0 bytes)

Did I do anything wrong?
I downloaded tesseract 3.14 and leptonica 1.73 and compiled both.

Version as reported by tesseract -v are:

tesseract 3.04.00
 leptonica-1.73
  libjpeg 8b (libjpeg-turbo 1.2.0) : libpng 1.2.46 : zlib 1.2.3.4


Any help will be gretaly appreciated...

Regards,
Ashish

[Zdenko Podobný]

Your leptonica build support only limited number of image formats. What image you try to process?

Zdenko

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[ashish goel]

I am trying to process a png image. Will it work, if I convert my png to tiff before OCRing?

To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/CAJbzG8yikU0j5on5Cf02npnv6a6G%3DPvDVamjZTY4nsDF0SynEQ%40mail.gmail.com.

[Ashish Goel]

Hey Zdenko,
I also tried converting my image to tif/tiff, but still it did not gave me a good tessinput.tif
I found that libtiff is missing on my environment. So, I installed libtiff4-dev and recompiled leptonica.

Now my version shows up as:

tesseract 3.04.00
 leptonica-1.73
  libjpeg 8b (libjpeg-turbo 1.2.0) : libpng 1.2.46 : libtiff 3.9.5 : zlib 1.2.3.4

but still tessinput.tif is blank.

Is there anything else that I can try so that I can get tessinput.tif?

Thanks
Ashish

[Zdenko Podobný]

What OS are you using?

Zdenko

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[Ashish Goel]

Ubuntu 12.04

On Monday, June 6, 2016 at 4:38:11 PM UTC+5:30, Ashish Goel wrote:

[Zdenko Podobný]

Is there a reason why you do not use leptonica shipped by Ubuntu?

It is difficult to find where is your problem from your description. I think best approach is it to use sw packaged by your distribution in case of any problem with custom compiled sw...

Zdenko

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[Ashish Goel]

Zdenko,

Thanks for your reply. I will try with standard distro and let know if it works. 

Ashish

On Monday, June 6, 2016 at 4:38:11 PM UTC+5:30, Ashish Goel wrote: