Nucore Technology, Inc.

Shingo Kokudo

Ion E Opris

Fumitaka Okamoto

Jonathan Adam Kleks

Toshihiro Sasai

Youichi Nakasone

An image processing apparatus includes a spatial filter and orthogonal transform section. The spatial filter obtains a new luminance value of each pixel of an input image on the basis of a first coefficient having a first filter characteristic which forms the desired spatial frequency adjustment filter characteristic in cooperation with a second filter characteristic, thereby generating a two-dimensional intermediate image which has the adjusted spatial frequency characteristic of the input image. The orthogonal transform section performs two-dimensional orthogonal transform for the intermediate image on the basis of a second coefficient which has the second filter characteristic, which forms the desired spatial frequency adjustment filter characteristic in cooperation with the first filter characteristic, and is used for two-dimensional orthogonal transform for compressing the intermediate image generated by the spatial filter, thereby generating image data which has the adjusted spatial frequency characteristic of the intermediate image and has undergone two-dimensional orthogonal transform for image compression.

Image processing apparatus

A nonvolatile semiconductor memory includes a memory unit, memory control unit, defect position detection unit, and data correction unit. The memory unit has a plurality of memory cells to discretely store an analog signal such as an image signal as analog data in the form of an analog value. The memory control unit sequentially selects the memory cells as a read out target of the memory unit in response to a predetermined clock. The defect position detection unit detects, on the basis of defect position information indicating a position of defective analog data included in the analog data read out from the memory unit, whether a memory cell corresponding to the defect position is selected by the memory control unit, and outputs a detection output. The data correction unit corrects the analog data at the defect position in accordance with the detection output from the defect position detection unit by using another analog data of the analog signal stored in said memory unit.

Structure and method for correction of defective analog data in a nonvolatile semiconductor memory

In a digital image processing device such as a portable digital camera, an analog decimation circuit is provided as a front end for the digital video imaging circuit so that the data rate is reduced without substantial loss in fidelity so that the power dissipation is minimized. In a decimation circuit, the data rate is reduced by reducing only higher frequency spectral components of a captured image without substantial loss in fidelity of the remaining spectral components of the captured image. The required amount of digital data processing is so substantially reduced that considerable power savings result. A mixture of decimation modes may be effected using the same circuit.

Growing community of inventors

Ibaraki, Japan

Shingo Kokudo