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Handwritten digit OCR

Project · study · 2024

Handwritten digit OCR is a set of Jupyter notebooks notebooks that train convolutional neural networks to recognise handwritten digits. It is written in Python with TensorFlow and Keras, and each notebook opens in Google Colab.

Experiments

The notebooks compare training set-ups on the same task:

  • a CNN trained for 50 and for 200 epochs;
  • the same with early stopping, which ends training when validation stops improving;
  • transfer learning from VGG16, a network pre-trained on ImageNet, including a variant with a higher learning rate;
  • a notebook comparing the results.

The trained models are saved in Keras format alongside them.

See also

In the knowledge graph

Handwritten digit OCR and the 11 things it is linked to. Open any dot for its page, or explore it in the full graph.

Python · skill · Built withPythonJupyter notebooks · skill · Built withJupyterMachine learning · skill · Built withMLTensorFlow · skill · Built withTensorFlowOptical character recognition · technique · ImplementsOptical character…Convolutional neural network · technique · ImplementsConvolutional neu…Transfer learning · technique · ImplementsTransfer learningEarly stopping · technique · ImplementsEarly stoppingMachine learning and data · theme · ThemesMachine learning …Open source on GitHub · person, role or place · ContextOpen sourceGoogle Colab · service or platform · Works withGoogle Colab Handwrittendigit OCR
11 linked in the graph: 4 skills4 techniques1 theme1 person, role or place1 service or platform
When
2023202420252026
Oct 2024 · 3 commits

As data

Everything on this page is read from triples in the knowledge graph. These are the 24 it states about Handwritten digit OCR, and 6 more its ontology implies; the console runs SPARQL over the whole graph, here in your browser.

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@prefix id: <https://ask.chaipat.cc/id/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix cj: <https://ask.chaipat.cc/ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

id:OCRDigits
    a cj:Project ;
    rdfs:label "Handwritten digit OCR" ;
    cj:description "Notebooks and models for recognising handwritten digits." ;
    cj:context id:OpenSource ;
    cj:repository "https://github.com/AppleBoiy/ocr-handwritten-digit"^^xsd:anyURI ;
    cj:firstCommit "2024-10-23"^^xsd:date ;
    cj:lastCommit "2024-10-23"^^xsd:date ;
    cj:commitCount 3 ;
    cj:kind "study" ;
    cj:license "MIT" ;
    cj:theme id:ThemeML ;
    cj:uses id:Python ,
            id:Jupyter ,
            id:MachineLearning ,
            id:TensorFlow ;
    cj:tier 3 ;
    cj:implements id:OCR ,
                  id:CNN ,
                  id:TransferLearning ,
                  id:EarlyStopping ;
    cj:integrates id:GoogleColab ;
    cj:article "https://ask.chaipat.cc/wiki/OCRDigits"^^xsd:anyURI ;
    cj:activeIn id:Y2024 ;
    cj:activity _:b111 .