Fujitsu Semiconductor Limited

Fujitsu Corporation

Fujitsu Microelectronics Limited

Yuji Watarai

Takeshi Seki

Tomohiro Fukuoka

Kiichiro Iga

An image processing apparatus includes an image pickup circuit that performs photoelectric conversion on an optical image, and a chromatic aberration correcting circuit that calculates an amount of shift by chromatic aberration based on a linear function to perform chromatic aberration correction on captured image data in accordance with the amount of shift. The chromatic aberration correcting circuit performs the chromatic aberration correction on a first pixel in a first area including an optical center of the captured image data with a first linear function using a distance from the optical center, and performs the chromatic aberration correction on a second pixel in a second area that does not include the optical center and that is different from the first area with a second linear function using the distance from the optical center.

Image processing apparatus including chromatic aberration correcting circuit and image processing method

An image processing circuit includes a memory configured to store an image retrieved from an image pick-up element, wherein the image is written on a plurality of rows of a two dimensional storage area of the memory and a filtering circuit configured to perform a filtering process with respect to each pixel data on a row when the image is written on the plurality of rows of the two-dimensional storage area of the memory.

Image processing circuit, image processing method, and camera

There is provided an image processing apparatus and an image processing method capable of exerting a noise reduction effect corresponding to a pixel value of a target pixel. An image processing apparatus that reduces a noise included in a target pixel while reflecting a surrounding pixel located on a surrounding of the target pixel, comprises a selecting section that selects a pixel width tolerable with reference to a true value of the target pixel as a pixel value of the target pixel and correcting section that extracts either one or both pixel values, namely, a pixel value of the surrounding pixel and the pixel value of the target pixel, as a correction value for correcting the pixel value of the target pixel depending on the pixel width selected by the selecting portion.

Image processing apparatus and method for target pixel noise reduction

An image processing filter for correcting a pixel value of an image includes a flatness calculation unitfor calculating a flatness of distribution of pixel values of surrounding pixels positioned on the periphery of a target pixel to be filtered, and a pixel value composition unitfor blending the pixel value of the target pixel and the pixel value of the surrounding pixels, on the basis of a blend ratio corresponding to the flatness calculated by the flatness calculation unit, and generating a composite pixel value by combining the pixel value of the target pixel and the pixel value of the surrounding pixels.

Image processing filter, image processing method of image processing filter, and image processing circuit of image processing apparatus having image processing filter

An image processing system is disclosed that includes a buffer unit configured to store a predetermined pixel and peripheral pixels neighboring the predetermined pixel in image data in a first direction and a second direction perpendicular to the first direction; and a first edge-detecting circuit configured to calculate a maximum value and a minimum value of a set of pixels selected from the peripheral pixels that have the same color as the predetermined pixel to calculate a difference value between the maximum value and the minimum value.

Image processing system that removes noise contained in image data

A defect pixel correction circuit that can easily determine a defect of an image sensor that has the defect that ranges to one direction and replace with the correcting pixel is provided. The defect pixel correction circuitincludes: a defect pixel determination unitconfigured to determine whether a noteworthy pixel oo is a defect pixel referring to a referring pixels ko, mo, qo and so that excludes the noteworthy pixel oo, the referring pixels centering on the noteworthy pixel oo and lining up in one direction; and a defect pixel correcting unitconfigured to generate a correcting pixel value on the basis of the referring pixels mo and qo, and replace the noteworthy pixel value that is pixel value of the noteworthy pixel oo with the correcting pixel value, when the noteworthy pixel oo is a defect pixel.

Defect pixel correction circuit, image processing system using the same, and defect pixel correcting method

An image signal processing device for correcting color difference signals includes a first correcting unit configured to set a correction amount for input color difference signals to '0' and generating output color difference signals when a colorless area containing the original point of a color difference space in which the two color difference signals are set as two intersecting axes, a first boundary line through which the inside and outside of the colorless area are partitioned, a suppression area which is nearer to the original point than the first boundary line and defined by a color difference suppression width, and a second boundary line through which the interior of suppression area and the inside area of the suppression area are partitioned are set in the color difference space and the values of the color difference signals are at the outside of the colorless area.

Color difference correction and imaging device

A noise characteristics measurement device that facilitates the measurement of noise characteristics in an imaging sensor. The noise characteristics measurement device has a classification circuit including a plurality of pixel value regions obtained by dividing a numerical range that can be taken by pixel values of the imaging sensor in accordance with the level of a pixel value. The classification circuit classifies pixel values of the imaging sensor into the plurality of pixel value regions. A calculation circuit calculates a value representing a dispersion degree of the pixel values classified into each pixel value region.

Device and method for measuring noise characteristics

A method for determining which one of regions in a chrominance space an input point belongs to. The regions are defined by boundary lines. The method includes generating in the chrominance space a first line, extending through the input point and the origin of the chrominance space, and a second line, connecting a point on the Cb axis of the chrominance space and a point on the Cr axis of the chrominance space. The method further includes comparing coordinates of a first intersection point, at which the first line and the second line intersect, and coordinates of second intersection points, at which the second line and the boundary lines intersect, to determine the region to which the input point belongs.

Method and apparatus for determining chrominance space

In designing a semiconductor device, a method of verifying an upper-hierarchy logic including a lower-hierarchy logic. First, a first verification logic having an output terminal, which is equivalent to an input terminal of the lower-hierarchy logic, and an input terminal, which is equivalent to an output terminal of the lower-hierarchy logic. Then, a second verification logic including only the input terminal and output terminal of the lower-hierarchy logic is produced, and an operational verification of the upper-hierarchy logic is executed using the first and second verification logics. This method eliminates the need for performing an operational verification of the lower-hierarchy logic at the time of the operational verification of the upper-hierarchy logic.

Growing community of inventors

Kasugai, Japan

Yuji Watarai