Control for variable magnification in an imaging apparatus

Details Control for variable magnification in an imaging apparatus Control for variable magnification in an imaging apparatus

1994-11-10

1996-12-31

Metjahic, Safet

Photography

Eye tracking

396 77, 396 79, G03B 300

Patent

active

055899080

ABSTRACT:
In an imaging system having a variable magnification element, a controller for controlling magnification so as to achieve desirable image composition. An object image is projected onto a visual field of a camera view finder and divided into a number of small blocks. The distance to the image portion in each small block is detected by a multipoint range finder. Small blocks having the same detected distance, or small blocks whose distances differ by less than a predetermined threshold value, are grouped together into one or more medium block(s). An sight line detection sensor detects where, in the visual field of the view finder, a photographer's line of sight is directed. At least one medium block is selected as the final desired image to be photographed on the basis of the sight line determination. The focal length of a zoom lens is determined, depending on the size of the selected medium block and the distance to the image portion it contains, and the lens is automatically driven to the desired focal length and focus condition.

REFERENCES:
patent: 5089841 (1992-02-01), Yamada
patent: 5122825 (1992-06-01), Tokumaru et al.
patent: 5158364 (1992-10-01), Yanogisauh et al.
patent: 5258801 (1993-11-01), Kusaka et al.
patent: 5422700 (1995-06-01), Suda et al.
patent: 5426483 (1995-06-01), Suzuki
patent: 5455654 (1995-10-01), Suzuki

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