摘要:
A MOS image sensor and an imaging apparatus using this image sensor enable controlling sensor driving with a high degree of freedom using a simple control circuit design and minimal wiring lines. The light reception unit of the image sensor in this imaging apparatus is segmented into a plurality of areas and conventional shift registers are constructed in multiple layers, thus enabling controlling the multiple sensor areas by means of a relatively simple circuit design. The imaging apparatus can thus locally change exposure and imaging conditions in parts of a single frame. Problems due to underexposure and overexposure are thus suppressed, and images with a wide dynamic range can be captured.
摘要:
In order to thin an input signal a second multiplexer is switched to output an output of a first adder and a third multiplexer is switched to output an output of a second adder, and a first multiplexer is alternatively switched at every line. A delay circuit memorizes the sum of the two preceding input signals, and the second adder outputs at every other line the sum of image data of a present line and the two preceding lines. To interpolate an input signal, the second multiplexer is switched to output the output of the delay circuit, the first multiplexer is alternatively switched to output either the input signal or the output of the second multiplexer, and the second multiplexer is alternatively switched to output either the output of the first adder or the output of the delay circuit. Thus, the delay circuit outputs at every other line the sum of the two preceding input signals. Because only one delay circuit is needed the size of the perpendicular thinning/interpolation circuit for an image signal is reduced.
摘要:
In a video signal digital magnetic recording and/or reproducing apparatus, an input image data array is rearranged into a different data array appropriate for data compression and then subjected to a data compression by variable length coding. The resulting data are rearranged after the data compression and then recorded sequentially onto a video track of a magnetic tape in the same order as that in the frame. In a high-speed playback mode, only the lower frequency component data is decoded every sync block, so that the data reproduced from one video track adjoin each other in the playback picture on the screen.
摘要:
An orthogonal transform coding device assembles sample values of the input signals and forms a large block. The large block is divided into a plurality of small blocks and the sample values are subjected to the orthogonal transform coding for every small block. A plurality of quantizers are provided for the orthogonal transformed components and the data amount after coding when the quantization performed by the respective quantizers is estimated, whereby the optimum quantizers are selected for the respective small blocks according to the estimated value.
摘要:
Provided is a moving picture coding device which makes it possible to suppress deterioration in coding efficiency caused by flickers occurring at a time of high-speed capturing under fluorescent lamp lighting or the like. A moving picture coding device which codes a plurality of pictures obtained by capturing an object, the moving picture coding device including: a luminance information acquisition unit which acquires luminance information which indicates a luminance level of light in an environment where the object is captured; and a coding unit which codes the pictures, using a prediction coding method in which a picture type is applied in the coding of the pictures according to a flicker state of the light obtained from the luminance information.
摘要:
The present invention provides a motion vector estimation apparatus which can decrease circuit size by reducing the amount of computations for detecting a motion vector. The motion vector estimation apparatus in the present invention includes a motion vector estimation unit which estimates a motion vector MV0F for the target block BL0 by searching within a reference picture P1 for a block with an image similar to an image in the target block BL0, which is included in a picture B2; a prediction calculation unit and a prediction range control unit which specify a search range in the reference picture P1 based on the motion vector MV0F and; the motion vector estimation unit estimates the motion vector MV1F for the target block BL1 by searching in the search range for a block with an image similar to an image in the target block BL1, which is included in the picture B3.
摘要:
Provided is a motion estimation device in which an amount of pixel data transferred from an external frame memory to an internal reference local memory is reduced. By the motion estimation device, it is possible to reduce a memory capacity and a size or processing of a circuit controlling the pixel transfer. In a reference memory control unit and an internal reference memory, a height of a area to be updated is set to L pixels, where L is power of 2, a logical address segments, whose size is suitable for address calculation, are allocated to picture space, and FIFO management is performs. In another application, an assistance memory is added, and another element other than the assistance memory performs the FIFO management for rectangular areas in an image of a conventional width. As a result, the address calculation is simplified, which makes it possible to reduce an embedded circuit for the reference memory control unit and the internal reference memory.
摘要:
Provided is a moving picture coding device which makes it possible to suppress deterioration in coding efficiency caused by flickers occurring at a time of high-speed capturing under fluorescent lamp lighting or the like.A moving picture coding device (100) which codes a plurality of pictures obtained by capturing an object, the moving picture coding device including: a luminance information acquisition unit (121) which acquires luminance information which indicates a luminance level of light in an environment where the object is captured; and a coding unit (106) which codes the pictures, using a prediction coding method in which a picture type is applied in the coding of the pictures according to a flicker state of the light obtained from the luminance information.
摘要:
A transcoder reducing processing amount when a coded stream to which at least intra prediction is applied is transcoded into a coded stream to which intra prediction and inter prediction are applied. The transcoder (100) converts a first coded stream to at least part of which intra prediction is applied, into a second coded stream to which intra prediction and inter prediction are applied. The transcoder (100) includes: a decoding unit (200) that decodes the first coded stream to generate decoded image data; a prediction mode obtaining unit (101) that obtains a prediction mode of intra prediction applied in decoding; a coding unit (300) that codes the decoded image data by applying the intra prediction or inter prediction to generate the second coded stream; and a control unit (103) that controls a coding unit (300) so that the coding unit (300) uses the prediction mode obtained by the prediction mode obtaining unit (101) when the coding unit (300) applies intra prediction.
摘要:
When a method or apparatus of assuring simultaneous exposure, such as a mechanical shutter, is not provided with a MOS imaging sensor, moving subjects are distorted with a MOS image sensor when capturing a still image of a fast-moving subject because imaging and reading are not simultaneous across the MOS sensor. Changing the MOS sensor exposure sequence and reading sequence, and interpolating the read data, change and correct the read sequence line by line when imaging a high resolution moving image, and thus improve distortion in moving subjects.