The version of leptonica that you have
leptonica-1.79.0
libpng 1.2.50 : zlib 1.2.8
Only has support for png. All others will fail.
You need to change leptonica build to include libtiff etc.
On Sat, Feb 1, 2020, 05:48 lundissimo <lu...@lundissimo.info> wrote:
> Thank you for that link. I hadn't retrieved the file from the releases
> section. I have now re-obtained and re-installed both leptonica and
> tesseract. Because I found files lib{gif,jpeg,png,tiff,webp,openjp2}* in
> system folder /usr/lib/x86_64-linux-gnu, I included that folder to the
> linker. The steps followed are as follows:
> wget https://github.com/DanBloomberg/leptonica/archive/1.79.0.zip
> unzip 1.79.0.zip
> cd leptonica-1.79.0/
> ./autogen.sh
> ./configure "LDFLAGS=-L/usr/lib/x86_64-linux-gnu"
> make
> make install
> cd ..
> wget https://github.com/tesseract-ocr/tesseract/archive/4.1.1.tar.gz
> zcat 4.1.1.tar.gz |tar xvf -
> cd tesseract-4.1.1
> ./autogen.sh
> ./configure "LDFLAGS=-L/usr/lib/x86_64-linux-gnu"
> make
> make install
> ldconfig
> make training
> make training-install
>
> I've attached the config.log files produced by both configure commands, in
> case they contain any clues.
>
> After this new install, the 'tesseract -v' command outputs:
> tesseract 4.1.1
> leptonica-1.79.0
> libpng 1.2.50 : zlib 1.2.8
>
> And of course, it does not work. Testing on an image of a page of text:
> tesseract 6305_6.jpg 6305_6
> Error in pixReadMemTiff: function not present
> Error in pixReadMem: tiff: no pix returned
> Error in pixaGenerateFontFromString: pix not made
> Error in bmfCreate: font pixa not made
> Tesseract Open Source OCR Engine v4.1.1 with Leptonica
> Error in pixReadStreamJpeg: function not present
> Error in pixReadStream: jpeg: no pix returned
> Error in pixRead: pix not read
> Error during processing.
> There must be something missing in the system, or in the build options.
>
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