| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image tracking device with less erroneous tracking. <P>SOLUTION: The image tracking device 30 according to the present invention includes: a storage section for storing, as a template, a subject area A including a present focus area a1 where auto-focus is being carried out; a first search means for searching for a first area Bn with high similarity to the template in a first search range n including the present focus area a1; a second search means for searching for a second area Bw with high similarity to the template within a second search range w wider than the first search range n; and an area determination means for comparing the first area Bn and second area Bw with the template, thereby obtaining the degree of similarity to the corresponding template, giving preference to the area with higher degree of similarity over the other when one of the first and second areas Bn and Bw is higher than the other in the degree of similarity or giving priority to the first area Bn if they are equal in the degree of similarity, thereby determining the subsequent focus area a1 where the subsequent auto-focus is carried out. <P>COPYRIGHT: (C)2012,JPO&INPIT |
