The input dataset is defined and loaded. The create_conv_layer function presented in the recipe takes the following five input parameters and needs to be defined while setting-up a convolution layer:

1. Input: This is a four-dimensional tensor (or a list) that comprises a number of (input) images, the height of each image (here 32L), the width of each image (here 32L), and the number of channels of each image (here 3L : red, blue, and green).
2. Num_input_channels: This is defined as the number of color channels in the case of the first convolution layer or the number of filter channels in the case of subsequent convolution layers.
3. Filter_size: This is defined as the width and height of each filter in the convolution layer. Here, the filter is assumed to be a square.
4. Num_filters: This is defined as the number of filters in a given convolution layer.
5. Use_pooling: This is a binary variable that is used perform 2 x 2 max pooling.