A correct reasoning with an elementary geometry problem is often closely linked to an intelligent reading of the figure associated to the problem.
This work is the first part of a software helping reading a figure. The program, such as it is written at present, is able to detect circles and lines, and also some simple
geometric configurations in an image. This paper handles notably with the difficulties we had to surmount in order to
carry this work to a successful conclusion.
Keywords : geometry problem, figure, objects detection, Hough Transform.