  This work focuses on the Fast Hough Transform (FHT) algorithm proposed by
M.L. Brady. We propose how to modify the standard FHT to calculate sums along
lines within any given range of their inclination angles. We also describe a
new way to visualise Hough-image based on regrouping of accumulator space
around its center. Finally, we prove that using Brady parameterization
transforms any line into a figure of type "angle".
