Explaination for Equation 10

[devavratTomar]

Hi,

Thank you for your great work. I had a question regarding equation 10 in your paper, where you approximate gradient of transformed image with respect to the magnitude of the transformation operation ( d x_ij/ dm) = 1. I don't understand the reason behind this as the pixel values may not always increase (+1 gradient) if you increase the magnitude (for e.g. shearX, shearY).

Thanks.