Abstract: An image processing apparatus comprising: an acquisition unit configured to acquire an image signal obtained by imaging an object by an image sensing unit; a generation unit configured to obtain a luminance distribution of the object based on the obtained image signal; a division unit configured to divide a region having a luminance lower than a predetermined luminance in the generated luminance distribution into a predetermined number of sub-regions, and obtain a most frequent region having a highest luminance frequency from the divided sub-regions; a selection unit configured to select a correction table corresponding to the obtained most frequent region from a plurality of correction tables stored in a storage unit; and a processing unit configured to perform a tone correction process on the image signal by using the selected correction table.

Abstract: The present disclosure provides a multi-carrier optical transmitter, receiver, transceiver, and associated methods utilizing offset quadrature amplitude modulation thereby achieving significant increases in spectral efficiency, with negligible sensitivity penalties. In an exemplary embodiment, an optical transmitter includes circuitry configured to generate a plurality of optical subcarriers, a plurality of data signals for each of the plurality of subcarriers, and a plurality of modulator circuits for each of the plurality of subcarriers, wherein each of the plurality of modulator circuits includes circuitry configured to offset an in-phase component from a quadrature component of one of the plurality data signals by one-half baud period.

Abstract: A projection system and an operation method thereof are provided. The projection system includes a video and audio source, an image duplication unit, a plurality of image segmentation units, and a plurality of projectors. The video and audio source receives a sum image parameter, and provides a non-standard format image. The image duplication unit receives and sends one of sum image parameters to the video and audio source. The image segmentation units provide the same sum image parameters, though only one is transmitted to the video and audio source through the image duplication unit. Each of the image segmentation units receives the non-standard format image, and segments a part of the non-standard format image as a standard format image, where the standard format images are partially overlapped with each other. The projectors are respectively coupled to the corresponding image segmentation unit, and display according to the corresponding standard format image.

Abstract: The sense of contrast perceived by a viewer of an image is quantified and adequate image processing is carried out on image data based on the sense of contrast. Contrast-sense quantification means generates unsharp image data of the image data and then generates a histogram of the unsharp image data. Since the histogram of the image data includes lightness information of details of the image, a distribution width thereof does not represent the contrast perceived by the viewer of the image as a whole. However, since the histogram of the unsharp image data excludes information of the details, a distribution width of the unsharp image data represents the contrast of the overall image. The distribution width of the histogram of the unsharp image data is found as the sense of contrast and input to processing means. In the processing means, tone conversion processing is carried out on the image data by changing a tone conversion LUT based on the sense of contrast, and processed image data are obtained.

Abstract: The sense of contrast perceived by a viewer of an image is quantified and adequate image processing is carried out on image data based on the sense of contrast. Contrast-sense quantification means generates unsharp image data of the image data and then generates a histogram of the unsharp image data. Since the histogram of the image data includes lightness information of details of the image, a distribution width thereof does not represent the contrast perceived by the viewer of the image as a whole. However, since the histogram of the unsharp image data excludes information of the details, a distribution width of the unsharp image data represents the contrast of the overall image. The distribution width of the histogram of the unsharp image data is found as the sense of contrast and input to processing means. In the processing means, tone conversion processing is carried out on the image data by changing a tone conversion LUT based on the sense of contrast, and processed image data are obtained.

Abstract: This invention provides an image processing apparatus which receives an image signal divided into a plurality of different subband components, detects an error in low-frequency subband component data within the image signal of one picture, and interpolates remaining frequency subband component data other than the low-frequency subband component of the picture in accordance with the error detection result.

Abstract: A user having a certain channel-bandwidth access to an interactive digital network, such as the internet, uploads control data to an allotted multiresolution data processor of a server system that downloads, to the user image content (e.g., a motion picture requested by the user) data, which may be statistically compressed. While the server system supplies the requested content as an input to the multiresolution data processor in uncompressed form at highest, spatial, temporal and color resolutions, the multiresolution data processor calculates the downloading bit rate and reduced spatial, temporal and/or color resolutions of the downloaded content in accordance with the uploaded control data from the user that defines the user's channel bandwidth and may also define the user's desired lower spatial, temporal and/or color resolutions.