Canon Kabushiki Kaisha

Shinya Hirai

Takashi Sasaki

Kenji Takahashi

Yoshinobu Shiraiwa

Hiroshi Kyogoku

Kota Terayama

Kaori Tajima

Shun Matsui

An image processing apparatus that causes an effect of emission of virtual light to be applied in a captured image includes an acquisition unit, a determination unit, and a correction unit. The acquisition unit is configured to acquire ambient light distribution information in the captured image. The determination unit is configured, based on the ambient light distribution information acquired by the acquisition unit, to determine a color characteristic of a virtual light source that is a light source of the virtual light. The correction unit is configured, based on the color characteristic of the virtual light source determined by the determination unit, to make a correction by which the effect of the virtual light is applied in a partial area of the captured image.

Image processing apparatus, control method for image processing apparatus, and storage medium having correction of effect of virtual light source

A band processing circuit which generates image signals corresponding to different frequency bands from an image signal in which signals corresponding to different colors are arranged and which suppresses noise by synthesizing the image signals of the different frequency bands, a sampling circuit which generates image signal corresponding to the colors by sampling the image signal input from the band processing circuit in accordance with a predetermined arrangement, and a luminance/color generation circuit which generates a luminance signal in which aliasing is suppressed using an image signal output from the sampling circuit.

Image processing apparatus and image processing method

An input image is divided into images composed of luminance signals of a plurality of bands that make up the Laplacian pyramid, noise suppression is applied to each divided image, and then the divided images are composited by addition. The input image is also divided into images composed of color signals of a plurality of bands that make up the Gaussian pyramid, noise suppression is applied to each divided image, and the divided images are composited at an image-based ratio. By thus compositing the luminance signals and color signals, excellent noise suppression can be realized while alleviating deterioration in the image quality during the compositing.

Image processing apparatus and image processing method for noise filtering

The present invention provides an image processing apparatus that increases an effect of noise suppression processing and allows a visually excellent image to be obtained. This image processing apparatus divides an input image into bands to generate a high frequency image that does not include a direct current component. The image processing apparatus further generates reduced images each including the direct current component and having a different resolution from an image including the direct current component, and performs noise suppression processing on the high frequency image and the reduced images. The image processing apparatus then repeats enlargement and combining of the reduced images and adds a composite image and the high frequency image to finally obtain an output image.

Image processing apparatus, image processing method, and program to combine a composite image of noise suppressed images generated from images each including a direct current component and at least one noise suppresed image processed from at least one image not including the direct current component

An image capturing apparatus comprises an image capturing unit configured to capture an image; a determination unit configured to determine a plurality of object regions from the captured image; an acquisition unit configured to acquire a photometric value for each of the object regions; a decision unit configured to decide an exposure condition from the photometric value for each of the object regions; and a tone conversion unit configured to convert a tone of the captured image based on the exposure condition.

Image capturing apparatus for determining an exposure condition by calculating aphotmetric value for each object region and method of controlling the same

In an image processing apparatus, a reduced image in which an input image having a color pattern of a plurality of colors of different pixel densities is reduced is generated. A luminance signal is generated from the reduced image. A contour compensation signal is generated from weighted color signals of the reduced image. The luminance signal and the contour compensation signal are combined. If a reduction ratio of the reduced image is greater than a threshold, a weighting used for a color signal for which a pixel density is high in the input image is increased in comparison to a case where the reduction ratio is not greater to the threshold.

Image processing apparatus and control method thereof

An image processing apparatus comprises a noise suppression unit configured to perform noise suppression processing to a plurality of color signals obtained by band dividing an image signal by color, a one-plane conversion unit configured to generate a one-plane image having one signal per pixel, from the plurality of color signals to which the noise suppression processing has been done by the noise suppression unit, a processing unit configured to perform image processing in which a frequency characteristic changes, with respect to the one-plane image, a noise extraction unit configured to extract a noise component from the image signal, and an adding unit configured to add the noise component extracted by the noise extraction unit to a signal obtained by the processing unit.

Image processing apparatus, method for controlling the same and storage medium

A personal authentication apparatus comprises an input unit configured to input image data; a face detection unit configured to detect a face region of a person included in the image data input by the input unit, and to detect feature data from the detected face region; a facial expression determination unit configured to determine a facial expression from the face region detected by the face detection unit; a storage unit configured to store feature data used to authenticate a person in correspondence with respective facial expressions of a plurality of faces; a selection unit configured to select feature data corresponding to the facial expression determined by the facial expression determination unit from the storage unit; and an authentication unit configured to authenticate a person by comparing the feature data of the face region detected by the face detection unit, and the feature data selected by the selection unit.

Personal authentication apparatus and personal authentication method

A processing circuit which generates a plurality of signals of different frequency bands from a signal and which suppresses noise by synthesizing the signals of different frequency bands and a generation circuit which generates a signal in which an aliasing signal is suppressed are provided. A signal of the highest frequency band among the signals of different frequency bands to be synthesized with one another by the processing circuit includes the signal which is generated by the generation circuit and in which generation of aliasing signals is suppressed.

Image processing apparatus

A personal authentication apparatus comprises an input unit configured to input image data; a face detection unit configured to detect a face region of a person included in the image data input by the input unit, and to detect feature data from the detected face region; a facial expression determination unit configured to determine a facial expression from the face region detected by the face detection unit; a storage unit configured to store feature data used to authenticate a person in correspondence with respective facial expressions of a plurality of faces; a selection unit configured to select feature data corresponding to the facial expression determined by the facial expression determination unit from the storage unit; and an authentication unit configured to authenticate a person by comparing the feature data of the detected face region, and the feature data selected by the selection unit.

This invention improves the operability of an apparatus when the user focuses on the target object to obtain an image with an appropriate image quality. An image capturing apparatus includes an object detection unit, which detects an object from an image based on a signal output from an image sensor, a display unit which displays a marker corresponding to the position of the object detected by the object detection unit, and a change unit which changes the position of the marker displayed on the display unit. The change unit moves the marker to the position of an object detected by the object detection unit, that is different from the current position of the marker displayed on the display unit.

Image processing apparatus and control method therefor

An apparatus comprises a face position detection section for detecting at least a position at which is present a person's face inside a frame using an image signal obtained from an image sensor for photoelectrically converting an object image captured by a photographing optical system, a focus control section for controlling the photographing optical system by referencing in-focus positions of the object image obtained inside focus detection areas for detecting focus states of the object image positioned in the frame, and a control section for controlling the focus control section so as to reference at least one or the other of an in-focus position obtained in a first focus detection area in which is present a person's face and an in-focus position obtained in a second focus detection area in which is expected to be present a body of a person determining from the position of the face of the person.

Focus adjustment method, focus adjustment apparatus, and control method thereof

An image capturing apparatus comprises: an acquisition unit; a smear detection unit; and a smear correction unit which corrects a level of pixels in a smear region in original image data by a first correction amount obtained by multiplying a smear amount by a first coefficient, thereby generating first image data, and corrects the level of pixels in the smear region in the original image data by a second correction amount obtained by multiplying the smear amount by a second coefficient, thereby generating second image data, wherein the first image data is used for at least either of image displaying and image recording, the second image data is used for at least one of exposure control, focus adjustment, and white balance control, and the first coefficient is smaller than the second coefficient.

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Kawasaki, Japan

Shinya Hirai