| 摘要 |
The present invention relates to an apparatus and a method for detecting a vertex of an image, which minimize user interaction for detecting the vertex even when a touch input unit having a low degree of sensing precision is employed, thereby shortening the time taken for vertex detection and improving accuracy of vertex detection. For this, a method for detecting a vertex of an image according to an embodiment of the present invention comprises the following steps: taking, as an input, the position of the vertex of the image; setting a region of interest (ROI) containing the position of the vertex input in the previous step, and detecting a plurality of edges from the image in the region of interest; detecting a candidate line group for detecting an optimum vertex, on the basis of the plurality of edges; and removing, from among the candidate line group, a candidate line where the angle formed between the candidate line and a preset reference candidate line is lower than the critical angle, and detecting, as an optimum vertex, the intersection point where the distance between the position of the intersection point where the reference candidate line and a residual candidate line cross each other, and the input position of the vertex is at a minimum. |
