Tesseract For PHP error - Error in pixReadMemPng: tmpfile stream not opened

[Mike Tsai]

Hi,

I am currently having issue using Tesseract For PHP (https://github.com/thiagoalessio/tesseract-ocr-for-php) as I can't understand what the error means found in the error log of XAMPP server. >>

Warning in pixReadMemPng: work-around: writing to a temp file

Error in pixReadMemPng: tmpfile stream not opened

Error in pixReadMem: png: no pix returned

Error during processing.

I have installed the Tesseract OCR on the local machine, and test it out using Terminal, and it works perfectly. I could see the out.txt being created in the same folder as the image being rendered.

However, when I try to OCR the image via php in browser, it will not work, and throw the error stated above.

I am not sure what am I missing here?

If you can share me some light on this, it will be very helpful.

The below is the steps that I did:

1) Installed TesseractOCR on OSX using MacPort

$ tesseract -v

tesseract 3.04.00

 leptonica-1.73

  libgif 4.2.3 : libjpeg 9a : libpng 1.6.23 : libtiff 4.0.6 : zlib 1.2.8 : libwebp 0.5.0 : libopenjp2 2.1.0

2) Run and install Composer dependancy as the instruction and  then add the following code into index.php

require_once __dir__ . '/vendor/autoload.php';

echo (new TesseractOCR('text.png'))

->executable('/opt/local/bin/tesseract')

->run();

Thanks

Regards,

Mike

[Kyle Schultz]

replace text.png with the full source of the directory

[Jeff Breidenbach]

Go ahead and take this question to the tesseract-ocr-for-php developers.

From your error messages, you are running on a platform that

doesn't support fmemopen. If Windows, then there is trouble with

Leptonica's fallback function fopenWriteWinTempfile(). If Linux, then 

somehow PHP is restricting the call to tmpfile().

Anyway, start with the tesseract-ocr-for-php developers, and if they need 

a change to Leptonica have them get in direct contact with me or

the Leptonica author. This is probably not something you can solve for 

yourself as a user.