| 摘要 |
PURPOSE:To attain highly stable detection at all times with high accuracy by providing a correction means detecting the movement of a picture and correcting the movement and detecting a focus based on a signal component whose movement is corrected by the movement detection means. CONSTITUTION:An X axis projection circuit 7 obtains an X axis component signal 8 from a moving vector obtained from a moving vector arithmetic circuit 6. an edge detection circuit 9 detects an edge from information such as a tilt with respect to a picture signal and selects an edge with a larger tilt with respect to the X axis as an edge for focus discrimination, for example. An edge calculation circuit 10 calculates the edge from the density difference of the edge and the tilt of the edge and outputs the result as an edge width signal 11. The signal 11 is subtracted from a signal 8 and the result is fed to a comparator 12, and the signal is a corrected edge width signal. The comparator 12 writes a smaller edge width signal to a memory 13 in two corrected edge width signals and gives a control signal to a lens control circuit 14. Thus, the deterioration in the accuracy such as an unsharpened edge is prevented. |
