Problems encountered by tesseract-OCR during Web use

There are many examples on the Internet, and errors are reported during Web operations.

 
Java. util. nosuchelementexception at javax. ImageIO. SPI. filteriterator. Next (unknown source)
 

Environment:

JDK: jdk_1.6.0_30 used for compiling and running JDK: jdk_1.7.0_11

Web Container: tomcat-6.0.32

After a breakpoint test, it was found that (imageformat is not in the Image Format)

 
Iterator <imagereader> readers =ImageIO. getimagereadersbyformatname (imageformat );
 

In the iterator, readers shows that next is empty (or zerolist is empty in ITER ). I thought that some classes are not loaded and started to experiment with class. forname ("XX") separately. Later, you can manually register before the iterator.

Iioregistry registry =Iioregistry. getdefaultinstance (); Registry. registerserviceprovider (NewCom. Sun. Media. imageioimpl. plugins. Tiff. Fig (); Registry. registerserviceprovider (NewCom. Sun. Media. imageioimpl. plugins. Tiff. Unzip imagereaderspi ());
 

And then run it.

Reference: http://bbs.csdn.net/topics/370193992