Photography – Having camera indicator – Nonmechanical visual display
Reexamination Certificate
1999-06-08
2001-06-12
Perkey, W. B. (Department: 2851)
Photography
Having camera indicator
Nonmechanical visual display
C396S296000
Reexamination Certificate
active
06246837
ABSTRACT:
This application is based on application No. H10-160282 filed in Japan, the contents of which are hereby incorporated by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an image sensing apparatus for sensing a subject image.
2. Description of the Prior Art
When taking a picture with a camera, the photographer performs framing before releasing the shutter. Framing is important because the quality of the taken picture largely depends on whether framing is appropriately made or not.
At a normal photographing distance, since the area within the finder field frame is always taken on the film, the photographic range is decided with reference to the finder field frame. In short-range photographing, the photographic range is decided with reference to a parallax correction frame provided in the finder. The parallax correction frame is provided for correcting the parallax amount which increases in short-range photographing. In addition to such a camera, a camera is known which is, although high in cost, structured so that the parallax correction frame moves in accordance with the distance measurement result. In this camera, the photographic range is decided with reference to the correction frame that moves.
It is also important in framing to set a composition where the subject is not backlighted. However, more and more cameras have recently been designed so as to compensate for exposure by detecting that the subject is backlighted. Therefore, it has become unnecessary for the photographer to be aware of the position of the sun.
As a cause of failure in releasing the shutter, camera shake is considered. Cameras embodying various ideas to prevent camera shake have previously been known. For example, there is a camera having a function of compensating for camera shake by moving the optical system in accordance with the camera shake amount. According to such a camera, failures caused by camera shake can be reduced although this camera is large in size and high is cost.
However, even in cameras embodying various ideas as described above, taken pictures can be failures. The following are examples of causes of such failures: A beginner sometimes takes pictures without noticing that a part of the subject is situated outside the field frame. In the case of a single-lens reflex camera, although no parallax is caused, there are cases where the photographer does not notice that a part of the subject is situated outside because his or her attention is caught by other operations.
When photographing is performed in a macro mode with a camera having a macro mode capable of short-range photographing at a photographing distance of 40 to 50 cm, although the camera has a parallax correction frame for the macro mode, there are cases where the photographer forgets the presence of the correction frame during photographing and an upper part of the subject (in the case of photographing in landscape orientation) is situated outside. With respect to the lower part of the subject, although even a part not seen in the finder is included in the photographic range, there is no means for confirming it and the photographer cannot help but depend on experience. Consequently, there are cases where the photographer cannot set a composition which he or she desires.
Even if a camera shake compensating function is provided, since this function is limited, the taken pictures can be blurred according to photographing conditions. For example, when a child is photographed, if the child moves when the shutter is released, the taken picture is a failure according to the shutter speed. Further, zoom lens systems have recently become the norm, and particularly, on the telephoto side in compact cameras, the F number of the lens increases and the shutter speed is controlled so as to increase the exposure time, so that the possibility that the taken picture is blurred is high.
Moreover, the backlight correction is also limited. Correction cannot be made when a bright point light source is present within the photographic range and when a light source is situated outside in the vicinity of the finder field, so that there are cases that flare is caused in the taken picture. In the case of compact cameras, since the taking lens and the finder optical system are different, it is difficult to grasp how much the influence of backlight is, so that there are cases where the taken picture is a failure. Since whether the taken picture is failure or not cannot be found until the picture is developed and printed, it is impossible to photograph the subject again on the spot.
SUMMARY OF THE INVENTION
In view of the above-mentioned problem, an object of the present invention is to provide an image sensing apparatus in which failures in framing are reduced, further, an image sensing apparatus in which when failing in photographing, the photographer notices the failure immediately after the photographing.
To achieve the above-mentioned object, an image sensing apparatus of the present invention has an image sensing device for sensing a subject image from a range being wider than a photographic range, a processor for calculating position information of a subject with respect to the photographic range based on an output from the image sensing device, a discriminator for determining whether photographing is appropriately performed or not, based on information calculated by the processor, and a notifier for notifying a result of determination by the discriminator before photographing.
Moreover, an image sensing apparatus of the present invention has a taking lens, a finder optical system having an optical axis being different from that of the taking lens, an image sensing device for sensing a subject image, a processor for calculating information on parallax based on an output from the image sensing device, a discriminator for determining whether photographing is appropriately performed or not, based on information calculated by the processor, and a notifier for notifying a result of determination by the discriminator before photographing.
Moreover, an image sensing apparatus of the present invention has an image sensing device for sensing a subject image, a detector for detecting a subject distance based on an output from the image sensing device, a processor for calculating position information of a subject based on a result of detection by the detector, a discriminator for determining whether photographing is appropriately performed or not, based on information calculated by the processor, and a notifier for notifying a result of determination by the discriminator before photographing.
Moreover, an image sensing apparatus of the present invention has an image sensing device for sensing a subject image, a memory for storing therein image data before photographing and image data after photographing by the image sensing device, a comparator for comparing the image data before photographing and the image data after photographing stored in the memory, a discriminator for determining whether photographing was appropriately performed or not, based on a result of comparison by the comparator, and a notifier for notifying a result of determination of the discriminator after photographing.
REFERENCES:
patent: 5060007 (1991-10-01), Egawa
patent: 5266985 (1993-11-01), Takagi
patent: 8-29674 (1996-02-01), None
patent: 08184890 (1996-07-01), None
Kageyama Kazumi
Maehama Shinichi
Nagano Kouji
Nakamura Kenji
Burns Doane , Swecker, Mathis LLP
Minolta Co. , Ltd.
Perkey W. B.
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