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US 7,397,502 B2Granted
Imaging apparatus including control device for controlling white balance
AssigneeRicoh Company, Ltd.
InventorKenji Shiraishi
Life of this patent
Estimating the term…
Abstract
An imaging apparatus includes an imaging device to photograph an object and to convert an image of the object into an electronic image signal, a feature detection device to conduct a feature detection for a white balance control in accordance with the image signal, a white balance control device to conduct the white balance control by using a result of the feature detection device, a zoom area selection device to select the zoom area of the image signal in accordance with the imaging device, a display device to display the image signal of the area selected by the zoom area selection device, and a feature detection area selection device for a selecting area to conduct the feature detection for the white balance control.
Claims8
An imaging apparatus comprising:
- an imaging device to photograph an image of an object and convert said image of the object into an electronic image signal;
- a feature detection device to detect a feature for a white balance control in accordance with said electronic image signal;
- and
- a white balance control device to carry out the white balance control based on a result of said feature detection device;
- said imaging apparatus further comprising:
- a device to select a zoom area of the image signal by said imaging device;
- a device to display the image signal of the area selected by said zoom area selection device;
- and
- a device to select an area to conduct the feature detection for said white balance control, wherein
- said feature detection area selection device conducts the selection of said feature detection area in accordance with an area photographed by said imaging device and the area selected by said zoom area selection device;
- said white balance control device is adapted to be capable of selecting as to whether the feature detection area selected by said feature detection area selection device and the zoom area selected by said zoom area selection device are an identical area or not;
- and
- said feature detection device divides said feature detection area into several areas, and conducts a feature detection in each divided area, respectively, wherein said white balance control device conducts the white balance control without using a result of a feature detection for an area which is not included in said zoom area when a mode which matches said zoom area and said feature detection area is selected, and conducts the white balance control with a result of a feature detection from all of the area photographed by said imaging device when a mode which does not match said zoom area and said feature detection area is selected,
- wherein the imaging apparatus further comprises:
- a weighing setup device to set an influence degree of the white balance control to data in each area within said feature detection area,
- wherein said weighting setup device sets equally a weighting for a result of the feature detection in each of the areas, which are not included in said zoom area, and a weighing for a result of the feature detection in each of the areas within said zoom area when a macro mode or a portrait mode is used as a photographing mode;
- and
- wherein said white balance control device conducts the weighting to the result of the feature detection in said each area in accordance with the weighting set by said weighting setup device, and conducts the white balance control by use of said weighted result of the feature detection.
15 more elements
An imaging apparatus comprising:
- an imaging device to photograph an image of an object and convert said image of the object into an electronic image signal;
- a feature detection device to detect a feature for a white balance control in accordance with said electronic image signal;
- and
- a white balance control device to carry out the white balance control based on a result of said feature detection device;
- said imaging apparatus further comprising:
- a device to select a zoom area of the image signal by said imaging device;
- a device to display the image signal of the area selected by said zoom area selection device;
- and
- a device to select an area to conduct the feature detection for said white balance control, wherein
- said feature detection area selection device conducts the selection of said feature detection area in accordance with an area photographed by said imaging device and the area selected by said zoom area selection device;
- said white balance control device is adapted to be capable of selecting as to whether the feature detection area selected by said feature detection area selection device and the zoom area selected by said zoom area selection device are an identical area or not;
- and
- said feature detection device divides said feature detection area into several areas, and conducts a feature detection in each divided area, respectively, wherein said white balance control device conducts the white balance control without using a result of a feature detection for an area which is not included in said zoom area when a mode which matches said zoom area and said feature detection area is selected, and conducts the white balance control with a result of a feature detection from all of the area photographed by said imaging device when a mode which does not match said zoom area and said feature detection area is selected,
- wherein said imaging apparatus further comprises:
- a weighting setup device to set an influence degree for the white balance control to data in each area within said feature detection area, wherein
- said weighting setup device sets a weighting for a result of the feature detection in each of the areas, which are not included in said zoom area, lower than a weighting for a result of the feature detection in each of the areas within said zoom area if a light source of a high brightness is included in the result of the feature detection in each of the areas which are not included in said zoom area, and wherein
- said white balance control device conducts the weighting to the result of the feature detection in said each area in accordance with the weighting set by said weighting setup device, and conducts the white balance control by said weighted result of the feature detection.
14 more elements
An imaging apparatus comprising:
- an imaging device to photograph an image of an object and convert the image of the object into an electronic image signal;
- a zoom area selection device to select a zoom area which is a part of an entire area of the image signal converted by said imaging device;
- a detection area selection device configured to select a detection area from either the entire area photographed by the imaging device or the zoom area selected by the zoom area selection device, if the zoom area is selected by the zoom area selection device;
- a feature-detection device to detect a feature for a white balance control in accordance with the detection area which is selected by the detection-area selection device;
- and
- a white balance control device to carry out the white balance control based on a result of the feature detection device,
- wherein said feature detection device divides said feature detection area into several areas, and conducts a feature detection in each divided area respectively;
- and
- wherein the imaging apparatus further comprises:
- a weighing setup device to set an influence degree of the white balance control to data in each area within said feature detection area,
- wherein said weighting setup device sets equally a weighting for a result of the feature detection in each of the areas, which are not included in said zoom area, and a weighing for a result of the feature detection in each of the areas within said zoom area when a macro mode or a portrait mode is used as a photographing mode;
- and
- wherein said white balance control device conducts the weighting to the result of the feature detection in said each area in accordance with the weighting set by said weighting setup device, and conducts the white balance control by use of said weighted result of the feature detection.
10 more elements
Dependencies are inferred from the claim text.