摘要:
The image processing device according to an aspect of the invention comprises an image input device for inputting image data representing a color image, a distance calculation device for calculating a distance on a color space between a noticed pixel of the inputted color image and each of peripheral pixels including the noticed pixel, a factor calculation device for calculating a weighting factor for each peripheral pixel in accordance with the calculated distance, and a weighted average processing device for calculating image data of the noticed pixel by obtaining a weighted average of image data of the peripheral pixels using the weighting factor calculated for each peripheral pixel.
摘要:
A color imaging element including color filters arranged on pixels, wherein the color filter array includes a basic array pattern including first filters corresponding to a first color that most contributes to obtaining luminance signals and second filters corresponding to two or more second colors other than the first color, the basic array pattern repeatedly arranged in the horizontal and vertical directions, one or more first filters are arranged in each line in horizontal, vertical, and oblique directions of the color filter array, one or more second filters are arranged in each line in the horizontal and vertical directions of the color filter array in the basic array pattern, and a proportion of the number of pixels of the first color corresponding to the first filters is greater than proportions of the numbers of pixels of each color of the second colors corresponding to the second filters.
摘要:
The image processing device according to an aspect of the invention comprises an image input device for inputting image data representing a color image, a distance calculation device for calculating a distance on a color space between a noticed pixel of the inputted color image and each of peripheral pixels including the noticed pixel, a factor calculation device for calculating a weighting factor for each peripheral pixel in accordance with the calculated distance, and a weighted average processing device for calculating image data of the noticed pixel by obtaining a weighted average of image data of the peripheral pixels using the weighting factor calculated for each peripheral pixel.
摘要:
A photographic method for slow synchro-flash photography conducted by firing a flash at a slow shutter speed, comprising the steps of: starting exposure with a focusing lens placed at an arbitrary position, and moving the focusing lens to such a position as to focus on a main subject, just before the flash is fired.
摘要:
Noise reduction processing in accordance with frequency band is executed. To accomplish this, a image data dividing circuit divides image data into image data having frequencies in a low-frequency region, image data having frequencies in a low- to intermediate frequency region and image data having frequencies in a low- to high-frequency region. These items of image data thus divided on a frequency-band basis are input to respective ones of noise reduction circuits that have been set to respective ones of parameters suited to noise reduction of image data having frequencies in the low-, low- to intermediate and low- to high-frequency regions, respectively. The items of image data that have thus undergone noise reduction processing conforming to frequency band are input to an image data combining circuit. The latter combines the image data so as to obtain image data representing one frame of an image.
摘要:
There are provided an image processing apparatus and method capable of providing a good image whose overexposure and underexposure are suppressed by holding information about saturation and contrast at the time of performing a dynamic range compression. In the image processing apparatus, a level information calculating circuit calculates the level information of each pixel from R, G and B image signals for each pixel, a gain calculating circuit refers to a gain table based on the level information of each pixel calculated by the level information calculating circuit and calculates a gain by which the R, G and B signals of each pixel are multiplied, and a multiplying circuits multiply the R, G and B signals by the gain.
摘要:
CCD-RAW data obtained by sensing the image of a subject is applied to a first noise reduction circuit via a offset correction circuit, a gain correction circuit, a linear matrix circuit and a gamma correction circuit. Uncorrelated noise is removed from the CCD-RAW data in the first noise reduction circuit. The CCD-RAW data is subjected to synchronization (color interpolation) in the synchronization processing circuit, and luminance data Y and color difference data C is generated by an RGB-YC conversion circuit. The generated luminance data Y and generated color difference data C is subjected to noise reduction processing on a per-frequency-component basis in the second noise reduction circuit. Suitable noise reduction processing conforming to the state of image data before and after synchronization processing is executed.
摘要:
CCD-RAW data obtained by sensing the image of a subject is applied to a first noise reduction circuit via a offset correction circuit, a gain correction circuit, a linear matrix circuit and a gamma correction circuit. Uncorrelated noise is removed from the CCD-RAW data in the first noise reduction circuit. The CCD-RAW data is subjected to synchronization (color interpolation) in the synchronization processing circuit, and luminance data Y and color difference data C is generated by an RGB-YC conversion circuit. The generated luminance data Y and generated color difference data C is subjected to noise reduction processing on a per-frequency-component basis in the second noise reduction circuit. Suitable noise reduction processing conforming to the state of image data before and after synchronization processing is executed.
摘要:
Noise reduction processing in accordance with frequency band is executed. To accomplish this, a image data dividing circuit divides image data into image data having frequencies in a low-frequency region, image data having frequencies in a low- to intermediate frequency region and image data having frequencies in a low- to high-frequency region. These items of image data thus divided on a frequency-band basis are input to respective ones of noise reduction circuits that have been set to respective ones of parameters suited to noise reduction of image data having frequencies in the low-, low- to intermediate and low- to high-frequency regions, respectively. The items of image data that have thus undergone noise reduction processing conforming to frequency band are input to an image data combining circuit. The latter combines the image data so as to obtain image data representing one frame of an image.
摘要:
A plurality of photography operations are performed with respect to a single subject with different photography conditions, to obtain a plurality of image data sets. The obtained image data are processed to obtain a single dynamic range expanded image data set. A photography method is selected from among: a first method, in which photography is performed at least twice at different exposures; a second method, in which photography is performed with an underexposure at a step number based on a set dynamic range; and a third method, in which photography is performed at least twice with different underexposures at step numbers based on a set dynamic range, based on whether photography operations are possible at exposure ratios corresponding to the expansion ratio of the dynamic range and whether flash is emitted. Photography is performed according to the selected method, thereby preventing limitations of dynamic range due to hardware specifications.