发明名称 |
Automatic camera |
摘要 |
In a focus detection device for a camera, a plurality of distance sensors each for detecting a distance to an object in a plurality of areas of a photographing image plane are provided and distance data obtained by the distance sensors for each object in each area is supplied to a main object detection circuit and a normalizing circuit. The normalizing circuit normalizes the distance data into a real number ranging from 0 to 1 and then supplies the same to a neural network. The neural network formed of a single-layered neuron units of which the synapse connection weighting factors are previously obtained by the learning process, calculates a vector difference between the distance data and the synapse connection weighting factors of each neuron unit, detects the minimum vector difference, and outputs position data of a main object corresponding to a neuron unit which gives the minimum vector difference. The position data of the main object is input to a main object detection circuit. One of the outputs from the distance sensors corresponding to the main object is selected by the main object detection circuit and is supplied to a focus detection circuit for effecting the calculation to detect the focus. An output of the focus detection circuit is supplied to a lens driving mechanism so as to adjust the focus.
|
申请公布号 |
US5227830(A) |
申请公布日期 |
1993.07.13 |
申请号 |
US19920916792 |
申请日期 |
1992.07.17 |
申请人 |
OLYMPUS OPTICAL CO., LTD. |
发明人 |
YOSHIHARA, TAKAFUMI;WADA, TOSHIAKI |
分类号 |
G02B7/28;G03B7/091;G03B7/099 |
主分类号 |
G02B7/28 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|