Interesting test on recognition performance of BanglaOCR : DPI & scan vs computer generated image.doc

I was planning to test the performance of BanglaOCR for different type image (scanned image and computer generated image) in different dpi.

First of all I generated 4 images with dpi 100, 200, 300 and 400 ant test the performance. The output is as follows:

100 dpi:

Output: আরো তুমি ভো সারাদিনই খেনা এ।ন আমাদের ধেনভে দাংবা

200 dpi:

Output: আরেঢূ তুমি তো সার।দিনই খেল । এখন আমাদের খেলতে দ।ও।

300 dpi:

Output: আরে! তুমি তো সারাদিনই খেল। এখন আমাদের খেলভে দাও।

400 dpi:

Output: আরে! তুমি তো সারাদিনই খেল। এখন আমাদের খেলতে দাও।

In the second of this testing I scanned a line of text (font: SolaimanLipi, size 16) with dpi 100, 200, 300 and 400 ant test the performance. The output is as follows:

100 dpi:

Output: জারে! ড়ুমি ড়ো পীরুাদিনই খেদীা এখন থীনীদের খেঢৗতে দভো

200 dpi:

Output: আরে! তুমি ভো সারাদিনই খেল। এখন অ।ম।দের খেলভে দ।ও।

300 dpi:

Output: আরে! তুমি ভো সারাদিনই খেল। এখন আমাদের খেলভে দাও।

400 dpi:

Output: আরে! তুমি তো সারাদিনই খেল। এখন আমাদের খেলভে দাও।

The above observations make this clear that if we increase the dpi then the output will be better.

BanglaOCR V 0.5 (for Linux users) | Released

This is the announcement about the release of BanglaOCR V 0.5 (for Linux users). The release information is provided below:

Perquisites:
1. Tesseract OCR
2. Tidy
3. Java Runtime Environment (v 1.6)
4. Font : SolaimanLipi

User's Manual:
The manual is available with the package (BanglaOCR User Guide.pdf).

Feedback:
Any feedback about the application is highly appreciable. At present you can post feedback on the following email address: bangla.ocr@gmail.com

Test Images:
A set of test images are also available in the same site where the OCR setup package is available. So, please feel free to download them and test. The images were randomly selected to test the application and obviously not based on the best performance.

Download Link:
BanglaOCR V 0.5 (Linux Users)
Test Images

BanglaOCR V 0.6 | Released

This is the announcement about the release of BanglaOCR V 0.6. We already fixed few problems in V 0.5 and after solving those we moved to the next release. The release information is provided below:

Perquisites:
1. Microsoft .NET Framework Version 2.0 Redistributable Package (x86)
2. Microsoft Visual C++ 2005 Redistributable Package (x86)
3. Java Runtime Environment

User's Manual:
The manual will be available after installing BanglaOCR. Go to Start>> All Programs >> BanglaOCR>> BanglaOCR User Guide.

Feedback:
Any feedback about the application is highly appreciable. At present you can post feedback on the following email address: bangla.ocr@gmail.com
I am planning to build a document image database. So, if you would like, then send us your document images.

Test Images:
A set of test images are also available in the same site where the OCR setup package is available. So, please feel free to download them and test. The images were randomly selected to test the application and obviously not based on the best performance.

Download Link:
BanglaOCR V 0.6
Test Images

BanglaOCR V 0.5 | Internal Release

I would be happier if it is possible to avoid the word "Internal Release" now. But unfortunately after waiting for 15 days I am feeling that I should do this. This release is termed as internal as I am experiencing "Memory Leak" problem in my developed application and yet struggling to fix and solve that. However as I am trying to solve the memory leak problem therefore I am releasing this version for the purpose of internal testing and feedback.

Perquisites:
1. Microsoft .NET Framework Version 2.0 Redistributable Package (x86)
2. Microsoft Visual C++ 2005 Redistributable Package (x86)

Cautions:
1. Existence of memory leak problem: You might see that there are error messages about memory allocation. So, in that case you have to close the application and restart the OCR again. This is what the problem that I mentioned above. I am trying to solve this.

Feedback:
Any feedback about the application is highly appreciable. At present you can post feedback on the following email address: bangla.ocr@gmail.com

Test Images:
A set of test images are also available in the same site where the OCR setup package is available. So, please feel free to download them and test. The images were randomly selected to test the application and obviously not based on the best performance.

Download Link:
BanglaOCR V 0.5
Test Images

Bangla tesseract training data v-2.0 have been uploaded

I just uploaded the Bangla training data for tesseract engine. To be honest there are lot more works to do to improve the training data so that the recognition performance increases. So, I hope we will be able to improve the training data and thus newer version of the data will be available soon. If anyone want to take part of this task (preparing training data) and need any help then please feel free to contact with me. The links of the training data are given below:
http://ocropus-bengali.googlecode.com/files/Bangla%20tesseract%20training%20data%20v-2.0.zip

or

http://mhasnat.googlepages.com/Bangla_training_data_v_2_0.zip

uncompressed TIFF image converter | VC++ 2005

In the past two days I was searching for the source code for converting to an uncompressed tiff image from any image format. At last I got it, the link is as follows:

http://msdn.microsoft.com/en-us/library/system.drawing.imaging.encoder.compression.aspx

Current Status of Bangla OCR | 29th OCtober, 2008

In the past few days I was feeling the urgency of writing about the current status of our research and development. Its quite long time (more than 40 days) since I post anything about the status of our Bangla OCR into the blog. In the last post I wrote about segmentation success and shown a color segmented image. After that we tried to combine everything and go for the 2nd release of Bangla OCR which will actually tesseract based Bangla OCR. Feeling the actual demand we plan to develop it in both Windows and Linux platform. Thanks goes to Joyonto da, Firoj alam and Murtoza who encourage me to think and move towards both platform. I would like to write that we have significant improvement in our development task. Shouro is dealing with the finishing task of the Ubuntu GUI. I have faced several difficulties regarding to the issues like: including tessnet2.dll, handling the buffer overrun problem, post processor adding etc and spend past two weeks on these. I was depressed because of the problems of tessnet2.dll loading. At last Remi Thomas (developer of tesnet2.dll) ensure me that the problem (buffer overrun) that I was facing was on tesseract. So, I moved my focus back to the tesseract.exe and tried to include it with my windows application and run it as a hidden (background process). Now I am successful because I can see the output. Few things are yet to include in our application. Hope we can finish it soon and also release 2nd version of Bangla OCR.