Patent application number | Description | Published |
20090115798 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND IMAGE PROCESSING 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. | 05-07-2009 |
20090196525 | Gradation converting device, gradation converting 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 ΔΣ modulation unit that applies one-dimensional ΔΣ modulation to the image applied with the dither. | 08-06-2009 |
20090201516 | Gradation converting device, 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. | 08-13-2009 |
20100079482 | Gradation conversion device, gradation conversion method, and program - A gradation conversion device that converts a gradation of an image, includes: dither means for dithering the image by adding random noise to pixel values forming the image; and one-dimensional ΔΣ modulation means for performing one-dimensional ΔΣ modulation on the dithered image. | 04-01-2010 |
20100098337 | Image processing apparatus, image processing method, and program - 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 ΔΣ 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 ΔΣ 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 ΔΣ modulation error, and the filter unit configured to perform filtering in space directions. | 04-22-2010 |
20100098347 | Image processing apparatus, image processing method, and program - An image processing apparatus includes a gradation converting unit configured to simultaneously perform space-direction ΔΣ modulation and time-direction ΔΣ modulation on an image, thereby converting a gradation level of the image. | 04-22-2010 |
20100104211 | Image processing apparatus, image processing method, and computer program - An image processing apparatus includes: ΔΣ modulation means for applying ΔΣ modulation to an image; analog conversion means for converting a signal of the image, whose gradation is converted by the ΔΣ modulation means, into an analog signal; digital output means for outputting a digital signal of the image after gradation conversion; and analog output means for outputting an analog signal of the image after gradation conversion. The ΔΣ modulation means includes arithmetic means for filtering a quantization error; adding means for adding a pixel value of the image and output of the arithmetic means; quantization means for quantizing output of the adding means and outputting a quantized value; and subtracting means for calculating a difference between the output of the adding means and the quantized value. A filter coefficient for the filtering corresponding to the analog output is determined according to a frequency characteristic of the analog conversion means. | 04-29-2010 |
20100104213 | Image processing apparatus, image processing method, and computer program - An image processing apparatus includes: ΔΣ modulation means for applying, when predetermined signal processing is applied to a modulated image obtained by applying ΔΣ modulation to an image in a signal processing unit, the ΔΣ modulation to the image, wherein a frequency characteristic of noise shaping by the ΔΣ modulation is a characteristic opposite to a frequency characteristic of the predetermined signal processing. | 04-29-2010 |
20100104218 | Image processing apparatus, image processing method, and program - An image processing apparatus includes a multiplying unit configured to multiply an original image by a coefficient α used for α blending, thereby generating an α-fold original image, a quantizing unit configured to quantize the α-fold original image and output a quantized α-fold original image obtained through the quantization, a gradation converting unit configured to perform gradation conversion on the α-fold original image by performing a dithering process, thereby generating a gradation-converted α-fold original image, and a difference calculating unit configured to calculate a difference between the gradation-converted α-fold original image and the quantized α-fold original image, thereby obtaining a high-frequency component in the gradation-converted α-fold original image, the high-frequency component being added to a quantized composite image, which is generated by quantizing a composite image obtained through α blending with a quantized image generated by quantizing the original image. | 04-29-2010 |
20100165409 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND PROGRAM - The present invention relates to an image processing apparatus, an image processing method, and a program capable of improving the visual quality of an image after grayscale conversion. | 07-01-2010 |
20120044423 | VIDEO DATA PROCESSING APPARATUS AND CONTRAST CORRECTING METHOD - 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. | 02-23-2012 |