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Understanding the problem statement
Directly downloading and using MNIST dataset
Understanding Onehot encoded vectors
Converting encoded vector to images using helper function
What is Tensorflow and how does it works
What are Placeholder variables
Understanding a deep learning model and terms associated with it
Softmax activation function
"Gradient Descent Optimizer " and "Cross_entropy" loss function
Defining and Initiating a Tensorflow session
Plotting graphs after each epoch
Plotting graphs for weights after each optimization iteration
Making function for plotting graphs for each Convolution layer
Visualization of Weights and Optimization iteration using Confusion Matrix
Using Seaborn's heatmap function for visualizing Confusion Matrix
Learn computer vision fundamentals with the famous MNIST dataset.
Start here if...
you’re new to computer vision. This tensorflow project is the perfect introduction to techniques like neural networks using a classic dataset including preextracted features.
MNIST ("Modified National Institute of Standards and Technology") is the de facto “hello world” dataset of computer vision. Since its release in 1999, this classic dataset of handwritten images has served as the basis for benchmarking classification algorithms. As new machine learning techniques emerge, MNIST remains a reliable resource for researchers and learners alike.
The goal of this machine learning project using tensorflow is to correctly identify digits from a dataset of tens of thousands of handwritten images. We encourage you to experiment with different algorithms to learn firsthand what works well and how techniques compare.
Data Introduction:
Each image is 28 pixels in height and 28 pixels in width, for a total of 784 pixels in total. Each pixel has a single pixelvalue associated with it, indicating the lightness or darkness of that pixel, with higher numbers meaning darker. This pixelvalue is an integer between 0 and 255, inclusive.
The training data set, (train.csv), has 785 columns. The first column, called "label", is the digit that was drawn by the user. The rest of the columns contain the pixelvalues of the associated image.
Each pixel column in the training set has a name like pixelx, where x is an integer between 0 and 783, inclusive. To locate this pixel on the image, suppose that we have decomposed x as x = i * 28 + j, where i and j are integers between 0 and 27, inclusive. Then pixelx is located on row i and column j of a 28 x 28 matrix, (indexing by zero).
Practice Skills:
Computer vision fundamentals including simple neural networks.
Acknowledgements:
More details about the MNIST dataset, including algorithms that have been tried on it and their levels of success, can be found at http://yann.lecun.com/exdb/mnist/index.html. The dataset is made available under a Creative Commons AttributionShare Alike 3.0 license.