The data for the MNIST data can be found in the repository for this chapter. In its original form, it's not in a standard image format. So, we will need to parse the data into an acceptable format.
The dataset comes in two parts: labels and images. So here are a couple of functions, designed to read and parse the MNIST file:
// Image holds the pixel intensities of an image.// 255 is foreground (black), 0 is background (white).type RawImage []byte// Label is a digit label in 0 to 9type Label uint8const numLabels = 10const pixelRange = 255const ( imageMagic = 0x00000803 labelMagic = 0x00000801 Width = 28 Height = 28)func readLabelFile(r io.Reader, e error) (labels []Label, err error) { if e != nil { return nil, e } var magic, ...
