I am doing a classification net for image into text based on the paper "Reading Text in the Wild with Convolutional Neural Networks" by Max Jaderberg and others. Here it says I need to normalize each image subtracting its mean and dividing by its standard deviation.
Because each mean and standard deviation is exclusive for each image, using a constant value or a mean file doesn't serve my purpouse.
Is there a way to do this in the prototxt declaration of the net? Or using python?