How to do Digit Recognition using a Neural Network

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Digit recognition is the task of identifying characters or digits from images in a dataset. Whether you want to digitize historical documents, analyze user behavior with shopping receipts, or create automated grocery store checkouts; having the ability to recognize digits from images in a database is a useful skill best usa online casino. And now that we have access to many pre-trained neural networks — and their trained weights from Keras and other libraries — digit recognition using image recognition neural networks is surprisingly simple. In this blog post, we’ll go over how to do digit recognition using a neural network so you can build your own digit recognition software in no time.

What is Digit Recognition?

Digit recognition is a computer vision task in which an algorithm locates numbers in images and then reads them out. For example, a retailer might want to use digit recognition software to automatically identify product SKUs on receipts. Or you might use digit recognition to digitize older documents by running them through an OCR (optical character recognition) algorithm that converts printed text into computer-readable text. Many OCR algorithms have been developed over the years, but they often have limited success with handwritten or faded text. Digit recognition may be able to handle these types of documents that are too challenging for OCR software to read. Digit recognition is not the same thing as image recognition, which aims to identify what type of image it is. Digit recognition is about identifying digits that are present in an image. While image recognition often uses the same algorithms as digit recognition, it might use different parameters due to the considerable differences in the data.

Why do Digit Recognition with a Neural Network?

Neural networks have been used to solve image recognition tasks such as digit recognition for decades. But before recently, you would need to train a neural network yourself using a machine learning library such as TensorFlow or Caffe. Now, thanks to pre-trained image recognition neural networks, you can simply load the network’s pre-trained weights and start recognizing digits from images in your dataset. You can also use transfer learning to retrain a network for a different task such as OCR, document analysis, or text detection. Using a pre-trained neural network makes digit recognition both fast and easy. And transfer learning lets you re-use the existing weights from a pre-trained network to reduce training time. Plus, you can run your digit recognition software on a CPU or GPU in a distributed environment such as a cloud server like AWS

Step 1: Install Tensorflow and tf-digits

First, you’ll need to install TensorFlow. You can find installation instructions for macOS, Linux, and Windows on the TensorFlow website. Then, you’ll need to install the tf-digits Python library. You can install tf-digits using pip: By the way, tf-digits is compatible with both TensorFlow and Caffe. Once you’ve installed the TensorFlow and tf-digits libraries, you’re ready to move ahead with digit recognition.

Step 2: Prepare your data

Before you can start digit recognition, you’ll need to prepare your training data. For this example, we’ll use images from the MNIST dataset, which consists of handwritten digits from the 70s. You can download the MNIST dataset from the website and unzip the files. You’ll want to save your images in a folder on your computer (by default, the dataset images are saved in a folder named “data”). You’ll also want to create a new folder for your digit recognition model. Then, open a new Python script in a Jupyter notebook, and add the following code: First, you’ll read in the images in your dataset. The format of the data is a matrix of 28×28 pixel images with an associated label: Once you have the images and labels, you’ll create a tf.sequences.Sequence instance, which can be used to create a sequence of datasets. Using a sequence allows you to repeat a set of operations on each element in a dataset. The sequence creates a new dataset for each of the images in your dataset directory. Finally, you’ll create a instance that can be used to create a dataset from the image sequences. You’ll then use the Dataset instance to add the images and labels to the dataset.

Step 3: Build and Run the Model

Now that you have your training data ready, you can build and run the digit recognition model. First, you’ll create a TensorFlow graph to represent the model with tf.Graph() . Next, you’ll load the pre-trained weights from the TF-Digits library with tf.contrib.learn.preload_weights(“/path/to/weights/file.h5”) . Finally, you’ll create a TensorFlow session to run the graph with session = tf.Session(graph=graph) . Now that you have your graph ready, you can start the training process with model.train(input_data) . You can also evaluate the model with model.evaluate(input_data) . The model will create a new graph for each training session to avoid overfitting. Once you’re satisfied with the model’s accuracy, you can write out the graph with session.close() . And you’re ready to start digit recognition!


Digit recognition is a useful computer vision task that can be completed using an image recognition neural network such as tf-digits. First, you’ll need to install TensorFlow and tf-digits before loading the pre-trained weights and creating the model. Once the model is ready, you can start training the model and using it to recognize digits from images in your dataset. For more information on digit recognition and image recognition, visit the TensorFlow website.