bugfixes for Hindi text generation

[prathameshza]

Bugfix for Hindi text generation

bug 1: No Hindi text rendering in official trdg pypi package 1.8.0

reproduce results with:

trdg -l hi -c 10 -w 5

image

text

गरमटयए जतवन टकटकत फफकर बरत

Using official repository

bug 2: Hindi text don't have matras and matras in image are seperated!

reproduce results with:

git clone https://github.com/Belval/TextRecognitionDataGenerator.git

cd TextRecognitionDataGenerator/trdg/

python3 run.py -l hi -c 10 -w 5

Before bug fix

image

text

एकशरयत ठठकन ललत-षषठ बखन तर

After bug fix

image

text

कलपाओ घिघियाता हँसोहीं मकी डंडा-डोलिओं

Changes made

• Modified make_filename_valid function in utils.py to prevent it from removing Hindi Matras
• Modified save the image with try catch block in data_generator.py for OSError 22
• Replaced Hindi font Lohit-Devanagari with Gargi to separate Hindi Matras

Note: Changing the font also changes the images created per second

Below is the tested font and their speeds for Hindi image generation

Font	Speed
Lohit-Devanagari	15-16 it/s
Gargi	17-18 it/s
Sura unicode	11-12 it/s
akshra unicode	4-5 it/s
Kurti dev 010	50-55 it/s
aakar regular	50-55 it/s
freesansbold	9-10 it/s
Nakula	8-9 it/s

I am using Linux Mint 21.3 "Virginia" Cinnamon Edition for testing

• python version 3.10.12
• pillow version 9.5.0

I have also tested other languages with the modified changes, they work fine 👍

[abhi-glitchhg]

Thanks for this work.

[abhi-glitchhg]

But, stll there is problems with the generated images.

if you see the second and last word, they are not matching and generating some invalid text.