| 摘要 |
PURPOSE:To detect a camera hand-shake and to warn it by sampling and processing the output signal of a CCD line sensor. CONSTITUTION:Information on the shutter speed and aperture value at the point I of time when a shutter button is pressed is sent from a terminal 7 to a driving circuit 2, which drives the CCD line sensor 1 to send an output picture signal A to signal processing circuits 3 and 8. The circuit 8 inputs the information on the shutter speed and aperture value from the terminal 7 to calculate the difference between a maximum and a minimum level from the output signal of the sensor 1 and determine the number (n) of opicture elements, and calculates and sends the maximum level of a signal A at which said data is at least obtained to the circuit 3 as a threshold value L1. The circuit 3 samples part of the signal A above the threshold value L1 to obtain a signal B. The output picture signal C of the sensor 1 at the point II of time set after the point I of time is sent to the circuit 3 and sampled on the basis of a threshold value L2 obtained similarly to the threshold value II to obtain a signal D. The shifting extent of the signal D when the correlation calculated from the signals B and D is maximum corresponds to the picture blur amount generated between the points I and IIof time. |
