Sony Corporation

Makoto Tsukamoto

Jun Hirai

Naomasa Takahashi

Ayataka Nishio

Toshimichi Hamada

Makiko Shimada

Yukio Takeyari

Masaya Igarashi

A video data processing apparatus includes: a contrast correction calculating section correcting the contrast of input luminance data by performing a calculation using a contrast correction value; an error diffusion section performing an error diffusion process on the luminance data whose contrast has been corrected; an error diffusion setting section setting whether to perform the error diffusion process at the error diffusion section; a correction value setting section detecting black and white peak values of an input luminance signal and setting the contrast correction value using the detected black and white peak values; and a correction amount adjusting section adjusting the contrast correction value set by the correction value setting section depending on whether the error diffusion process is performed at the error diffusion section according to an instruction from the error diffusion setting section and supplying the adjusted contrast correction value to the contrast correction calculating section.

Video data processing apparatus and contrast correcting method

An image processing apparatus includes a first calculating unit configured to add a pixel value and an output of a filter unit, a first quantizing unit configured to quantize an output of the first calculating unit and output a quantized value serving as &#x394;&#x3a3; modulation data, a second calculating unit configured to calculate a difference between the output of the first calculating unit and the quantized value, thereby obtaining the quantization error, a second quantizing unit configured to quantize a portion of the quantization error and output compensating data, a third calculating unit configured to add the &#x394;&#x3a3; modulation data and the compensating data, thereby generating time-integration-effect-using error diffusion data, a fourth calculating unit configured to calculate a difference between the quantization error and the compensating data, the difference serving as a &#x394;&#x3a3; modulation error, and the filter unit configured to perform filtering in space directions.

Image processing apparatus, method and program for gradation conversion

An image processing apparatus which may include a grayscale modulator forming a &#x394;&#x3a3; modulator. The modulator may include an adder that adds the pixel value of an image and an output of a feedback arithmetic unit, a quantizing unit that quantizes an output of the adder and outputs a quantized value including a quantization error as the result of &#x394;&#x3a3; modulation, a subtractor that calculates the quantization error, and the feedback arithmetic unit that filters the quantization error and outputs the filtering result to the adder. The filter coefficient of filtering by the feedback arithmetic unit may be determined such that the amplitude characteristics of noise shaping by the &#x394;&#x3a3; modulator in a frequency band that is equal to or more than an intermediate frequency band are the inverse characteristics of the spatial frequency characteristics of the human eye.

Image processing apparatus, image processing method, and program

An image processing apparatus includes: &#x394;&#x3a3; modulation means for applying, when predetermined signal processing is applied to a modulated image obtained by applying &#x394;&#x3a3; modulation to an image in a signal processing unit, the &#x394;&#x3a3; modulation to the image, wherein a frequency characteristic of noise shaping by the &#x394;&#x3a3; modulation is a characteristic opposite to a frequency characteristic of the predetermined signal processing.

Image processing apparatus, image processing method, and computer program

An image processing apparatus includes: a filter-coefficient storing unit that stores filter coefficients respectively associated with spatial frequencies, which are the numbers of strips displayed per unit angle with respect to an angle of field of a display apparatus; a viewing-condition determining unit that determines, as viewing conditions, a viewing distance between a viewer and the display apparatus and pixel density of the display apparatus; a filter-coefficient setting unit that sets a filter coefficient selected on the basis of a spatial frequency calculated from the viewing conditions among the stored filter coefficients; and a gradation modulating unit including a quantizing unit that quantizes a pixel value in a predetermined coordinate position in an image signal and outputs the pixel value as a quantized pixel value in the predetermined coordinate position, the gradation modulating unit gradation-modulating the image signal by multiply-accumulating a set filter coefficient with respect to quantization errors caused by the quantizing unit to feedback the quantization errors to an input side of the quantizing unit.

Gradation converting device, image processing apparatus, image processing method, and computer program

A gradation converting device that converts gradation of an image includes: a dither unit that applies dither to the image by adding random noise to a pixel value forming the image; and a one-dimensional &#x394;&#x3a3; modulation unit that applies one-dimensional &#x394;&#x3a3; modulation to the image applied with the dither.

Gradation converting device, gradation converting method, and computer program

An image processing apparatus that displays, on a display region having a first number of pixels, an image represented by gigantic image data that is recorded in a recording medium and has a second number of pixels that is significantly greater than the first number of pixels, including: a reproducing unit configured to read image data from the recording medium; an output unit configured to output the image data, which is read by the reproducing unit from the recording medium, in synchronization with a vertical synchronization signal; and a control unit configured to control the reproducing unit and the output unit. The control unit performs control to extract and read a region corresponding to the display region from the gigantic image data recorded in the recording medium.

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Kanagawa, Japan

Makoto Tsukamoto