[tesseract-ocr] 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

Post by 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.
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
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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?

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

Post by 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.
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
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[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

Post by 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.
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]

What OS are you using?

Zdenko

Post by 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.
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

Post by 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.
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

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[Ashish Goel]

Ubuntu 12.04

Post by 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.
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]

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

Post by Ashish Goel
Ubuntu 12.04

Post by 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.
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

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[Ashish Goel]

Zdenko,

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

Ashish

Post by 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.
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

...