Top Marks for Student Kaggler in Bengali.AI | A Winner’s Interview with Linsho Kaku | by Kaggle Team | Kaggle Blog


Please be a part of us in congratulating Linsho Kaku (aka deoxy) on his solo first-place win in our Bengali.AI Handwritten Grapheme Classification challenge! Learn the profitable answer right here: 1st Place Solution with Code

Random Ink by Sankarshan Mukhopadhyay @Flickr

Linsho: I’m a scholar within the Rio Yokota Laboratory at the Tokyo Institute of Technology. The principle theme of the lab is excessive efficiency computing with superior architectures together with GPUs. We additionally cope with deep studying as certainly one of its purposes. I’m additionally an intern at Future Inc. engaged on an OCR process.

The expertise of engaged on OCR duties as an intern was an enormous benefit for me. The benefit through which I used to be capable of pre-process knowledge and create fashions was due to my intern expertise. I’ve by no means specialised in Few-Shot Studying, which has been a significant component within the scores of the highest groups this time round. Nonetheless, I believe my information of the paper, which was shared within the lab, made an enormous distinction.

In fascinated with the method, I went by means of the Kaggle discussions that have been introduced here and here.

As well as, I usually consulted Science Direct and different sources to attain Few-Shot Studying.

No pre-processing, equivalent to cropping or noise discount, was performed to the pictures. These processes didn’t enhance recognition accuracy, however fairly tended to cut back the quantity of data wanted. The disadvantages of cropping a smaller space than the required character space and erasing further characters far outweigh the benefits of giving clear enter.

Essentially the most important process wanted was not the classification of the three varieties of elements per se, however the creation of a mannequin that might acknowledge courses that weren’t given. The classification into three varieties of elements was solely a touch to unravel this important process. This isn’t to say the division into manually decided elements is acceptable. Abstracting the constructions that may seem in a personality is extra possible to enhance the accuracy of classification of unknown courses.

This time, I used a way to generate font picture characters from handwritten characters. This era mannequin is predicated on a method and elegance transformation mannequin known as CycleGAN. A sequence of fashions as much as the font picture classification mannequin linked to this generative mannequin will be thought of as a handwritten character classification mannequin. In such a view, the Font picture generated by the generative mannequin will be thought of as a function of the center layer of this sequence of handwriting classification fashions.

It’s extremely possible that every pixel of the font picture, which is an intermediate function, has generated the construction of the font picture by observing a comparatively slim portion of the handwriting. This may be regarded as producing options of a extra summary character construction. I believe having the ability to construct this method was the largest consider my method.

I used Pytorch as a deep studying framework and Jupyter Pocket book as an IDE.

I take advantage of some servers, which has four Tesla V100.

CycleGAN takes the next time:

Coaching time: four Tesla V100 2.5 days

Prediction time : 40 min x 2(ensemble 2 mannequin)

Other than this, it took a while to work on the standard class classification fashions and so forth.

I gained new abilities that can enable for a constant method to future challenges.

Grandmaster’s widespread sense (or what appears most evident) just isn’t at all times the perfect to win.

I’d wish to suggest a extra sensible OCR, that’s, a process that’s evaluated end-to-end from handwriting detection to recognition. (For instance, one thing that goals at transcription and digitization of handwritten notes). I really feel a general-purpose methodology of detection has not but been established despite enough recognition accuracy. Nonetheless, within the subject of Object Detection, there are fairly quite a lot of strategies being thought of, and I believe there’s quite a lot of hope for lively dialogue and improvement.

Linsho Kaku is a Grasp Scholar at Tokyo Institute of Know-how, supervised by Rio Yokota. His analysis pursuits embody deep studying, picture processing and optical character recognition.


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