Patents by Inventor Akihiro Oishi
Akihiro Oishi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20170201749Abstract: An image capturing apparatus has an encoding unit that encodes by generating a plane of each of color components that configure image data, and independently for each of the planes of the color components, performing frequency conversion processing, quantization processing, and entropy encoding, and a control unit that controls the encoding unit. The control unit decide whether or not to correct a quantization coefficient that is used in quantization processing for a plane of each color component obtained by the image sensor based on an ISO sensitivity or exposure information for a time of capturing; and in a case when it decides that a quantization coefficient will be corrected, determines, based on a distribution of a histogram of a plane of each color component, a quantization coefficient used in quantization processing for the respective color component.Type: ApplicationFiled: January 12, 2017Publication date: July 13, 2017Inventor: Akihiro OISHI
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Patent number: 9609328Abstract: An electronic device includes an image capture unit that generates first RAW image data; a compression unit that compresses the first RAW image data; a decompression unit that decompresses the compressed first RAW image data to generate second RAW image data; a development unit that generates first developed image data from the first RAW image data, and generates second developed image data from the second RAW image data; and a control unit that controls the compression unit based on the first developed image data and the second developed image data.Type: GrantFiled: November 11, 2014Date of Patent: March 28, 2017Assignee: Canon Kabushiki KaishaInventor: Akihiro Oishi
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Publication number: 20160159965Abstract: A polyurethane dispersion is a polyurethane dispersion in which polyurethane resin produced by reaction of an isocyanate group-terminated prepolymer with a chain extender is dispersed in water. The isocyanate group-terminated prepolymer is produced by at least allowing a polyisocyanate component containing xylylene diisocyanate and/or hydrogenated xylylene diisocyanate to react with a polyol component containing diol having 2 to 6 carbon atoms, a low-molecular-weight polyol having a functionality of three or more, and an active hydrogen group-containing compound containing a hydrophilic group. The chain extender contains an alkoxysilyl compound having a primary amino group, or a primary amino group and a secondary amino group, and the molar ratio of the hydroxyl group in the low-molecular-weight polyol having a functionality of three or more is less than 25% relative to a total mol 100% of the hydroxyl group in the polyol component.Type: ApplicationFiled: July 16, 2014Publication date: June 9, 2016Applicant: MITSUI CHEMICALS, INC.Inventors: Takashi UCHIDA, Chikako KOUDA, Akihiro OISHI
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Patent number: 9319680Abstract: An image encoding apparatus for encoding image data including a plurality of frames, determines an encoding block size of an encoding subject frame of the image data based on the obtained image data, encodes the obtained image data on an encoding block unit basis in accordance with the determined encoding block size, controls a code amount of the size-decided encoding block based on encoding information regarding the current size-decided encoding block and the encoding block encoded before the current encoding block, operates predetermined encoding information of the encoding subject frame based on the encoding information, and restricts the encoding block size to be determined, in accordance with the operated predetermined encoding information.Type: GrantFiled: June 4, 2013Date of Patent: April 19, 2016Assignee: CANON KABUSHIKI KAISHAInventor: Akihiro Oishi
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Patent number: 9066100Abstract: At least one exemplary embodiment is directed to an image coding apparatus configured to encode moving image data including: a coding unit configured to encode each picture in the moving image data in a unit of a first block; a luminance change detection unit configured to divide the moving image data into a plurality of second blocks and to detect a luminance change block in which a luminance change occurred from the plurality of the second blocks in one picture; and a code amount adjustment unit configured to increase an amount of code allocated to the first block if the first block corresponds to the luminance change block detected by the luminance change detection unit.Type: GrantFiled: September 4, 2012Date of Patent: June 23, 2015Assignee: Canon Kabushiki KaishaInventor: Akihiro Oishi
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Patent number: 9055292Abstract: A moving image encoding apparatus for dividing an image into image blocks and performing intra-prediction encoding of a target image block using pixel values of an image block adjacent to the target image block, comprises a prediction unit for performing intra-prediction in accordance with one of intra-prediction modes corresponding to divided block sizes and outputting intra-predicted image data for the target image block, a determination unit for, when the target image block is a low frequency band image, determining by detecting a change in the pixel value in the image block whether the target image block includes a gradation image, and a decision unit for, when it is determined that the target image block includes the gradation image, deciding a block size of the intra-prediction so as to cause the prediction unit to preferentially select a minimum block size of the divided block sizes.Type: GrantFiled: April 5, 2011Date of Patent: June 9, 2015Assignee: CANON KABUSHIKI KAISHAInventor: Akihiro Oishi
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Publication number: 20150130965Abstract: An electronic device includes an image capture unit that generates first RAW image data; a compression unit that compresses the first RAW image data; a decompression unit that decompresses the compressed first RAW image data to generate second RAW image data; a development unit that generates first developed image data from the first RAW image data, and generates second developed image data from the second RAW image data; and a control unit that controls the compression unit based on the first developed image data and the second developed image data.Type: ApplicationFiled: November 11, 2014Publication date: May 14, 2015Inventor: Akihiro Oishi
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Patent number: 8938005Abstract: An image encoding apparatus which encodes picture data is provided. The apparatus comprises an encoding unit configured to encode a picture to be encoded; a decoding unit configured to decode the encoded picture; an SN ratio calculation unit configured to calculate an SN ratio using the picture to be encoded and a decoding result of the decoding unit; a setting unit configured to set a target SN ratio serving as an index of the SN ratio; a bitrate control unit configured to control a bitrate of the picture to be encoded based on the target SN ratio; and a motion detection unit configured to detect motion information between the picture to be encoded and another picture, wherein the bitrate control unit controls the bitrate based on the motion information, and a difference between the SN ratio and the target SN ratio.Type: GrantFiled: October 31, 2008Date of Patent: January 20, 2015Assignee: Canon Kabushiki KaishaInventor: Akihiro Oishi
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Publication number: 20130343449Abstract: An image encoding apparatus for encoding image data including a plurality of frames, determines an encoding block size of an encoding subject frame of the image data based on the obtained image data, encodes the obtained image data on an encoding block unit basis in accordance with the determined encoding block size, controls a code amount of the size-decided encoding block based on encoding information regarding the current size-decided encoding block and the encoding block encoded before the current encoding block, operates predetermined encoding information of the encoding subject frame based on the encoding information, and restricts the encoding block size to be determined, in accordance with the operated predetermined encoding information.Type: ApplicationFiled: June 4, 2013Publication date: December 26, 2013Inventor: Akihiro Oishi
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Patent number: 8345157Abstract: An image processing apparatus detects an amount of pixel motion in a plurality of field images included in interlace image data, and determines a pixel region having a large motion by comparing the amount of the motion of the detected pixel to a predetermined threshold value. An image processing apparatus combines a predetermined pattern with the pixel region that has a large motion and is converted from the interlace image.Type: GrantFiled: September 26, 2008Date of Patent: January 1, 2013Assignee: Canon Kabushiki KaishaInventor: Akihiro Oishi
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Publication number: 20120328006Abstract: At least one exemplary embodiment is directed to an image coding apparatus configured to encode moving image data including: a coding unit configured to encode each picture in the moving image data in a unit of a first block; a luminance change detection unit configured to divide the moving image data into a plurality of second blocks and to detect a luminance change block in which a luminance change occurred from the plurality of the second blocks in one picture; and a code amount adjustment unit configured to increase an amount of code allocated to the first block if the first block corresponds to the luminance change block detected by the luminance change detection unit.Type: ApplicationFiled: September 4, 2012Publication date: December 27, 2012Applicant: CANON KABUSHIKI KAISHAInventor: Akihiro Oishi
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Patent number: 8270481Abstract: At least one exemplary embodiment is directed to an image coding apparatus configured to encode moving image data including: a coding unit configured to encode each picture in the moving image data in a unit of a first block; a luminance change detection unit configured to divide the moving image data into a plurality of second blocks and to detect a luminance change block in which a luminance change occurred from the plurality of the second blocks in one picture; and a code amount adjustment unit configured to increase an amount of code allocated to the first block if the first block corresponds to the luminance change block detected by the luminance change detection unit.Type: GrantFiled: March 6, 2007Date of Patent: September 18, 2012Assignee: Canon Kabushiki KaishaInventor: Akihiro Oishi
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Patent number: 8218626Abstract: An encoding control apparatus is disclosed that includes a variance calculation unit configured to calculate a variance of an encoding target macroblock; a sum-of-absolute-difference calculation unit configured to calculate a sum of absolute differences between the encoding target macroblock and a reference macroblock; a setting unit configured to set, based on the variance and the sum of absolute differences, a standard for determining whether to skip encoding of the encoding target macroblock; a prediction unit configured to perform motion compensation prediction on the encoding target macroblock to obtain a motion-compensated prediction value; and a determination unit configured to determine whether to skip encoding of the encoding target macroblock by comparing the motion-compensated prediction value with the standard. Related apparatuses and methods are also disclosed.Type: GrantFiled: May 29, 2008Date of Patent: July 10, 2012Assignee: Canon Kabushiki KaishaInventor: Akihiro Oishi
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Patent number: 8208538Abstract: An image signal processing apparatus for quantizing an inputted moving image signal according to a quantization step so that a code amount of one frame becomes a target code amount, and for variable-length-coding the quantized moving image signal, in which a minimum value of the quantization step is determined for each frame, and the quantization step is determined so as not to be less than the minimum value.Type: GrantFiled: March 31, 2010Date of Patent: June 26, 2012Assignee: Canon Kabushiki KaishaInventor: Akihiro Oishi
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Publication number: 20110280308Abstract: There is provided a moving image encoding apparatus for performing motion compensation prediction encoding. The apparatus comprises, among other things: a calculation unit configured to calculate, for each of a plurality of motion vectors, a difference between an encoding target block image and a reference block image which exists at a position moved based on the motion vector from a position in a reference image corresponding to the predetermined position; and a selection unit configured to select one motion vector from the plurality of motion vectors such that reducing a code amount when the selected motion vector is encoded and reducing the difference corresponding to the selected motion vector are achieved in predetermined balance. The predetermined balance gives priority to reducing the difference over reducing the code amount as a minimum value of a plurality of differences calculated by the calculation unit becomes smaller.Type: ApplicationFiled: April 29, 2011Publication date: November 17, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Akihiro Oishi, Hiroaki Endo
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Publication number: 20110249740Abstract: A moving image encoding apparatus for dividing an image into image blocks and performing intra-prediction encoding of a target image block using pixel values of an image block adjacent to the target image block, comprises a prediction unit for performing intra-prediction in accordance with one of intra-prediction modes corresponding to divided block sizes and outputting intra-predicted image data for the target image block, a determination unit for, when the target image block is a low frequency band image, determining by detecting a change in the pixel value in the image block whether the target image block includes a gradation image, and a decision unit for, when it is determined that the target image block includes the gradation image, deciding a block size of the intra-prediction so as to cause the prediction unit to preferentially select a minimum block size of the divided block sizes.Type: ApplicationFiled: April 5, 2011Publication date: October 13, 2011Applicant: CANON KABUSHIKI KAISHAInventor: Akihiro Oishi
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Publication number: 20100189176Abstract: An image signal processing apparatus for quantizing an inputted moving image signal according to a quantization step so that a code amount of one frame becomes a target code amount, and for variable-length-coding the quantized moving image signal, in which a minimum value of the quantization step is determined for each frame, and the quantization step is determined so as not to be less than the minimum value.Type: ApplicationFiled: March 31, 2010Publication date: July 29, 2010Applicant: CANON KABUSHIKI KAISHAInventor: AKIHIRO OISHI
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Patent number: 7720144Abstract: An image signal processing apparatus for quantizing an inputted moving image signal according to a quantization step so that a code amount of one frame becomes a target code amount, and for variable-length-coding the quantized moving image signal, in which a minimum value of the quantization step is determined for each frame, and the quantization step is determined so as not to be less than the minimum value.Type: GrantFiled: May 6, 2005Date of Patent: May 18, 2010Assignee: Canon Kabushiki KaishaInventor: Akihiro Oishi
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Patent number: 7689045Abstract: An image capture apparatus generates video data from captured images, and generates a video PES (packetized elementary stream) from the video data. The image capture apparatus converts the video PES into a MPEG-2 program stream, and converts the video PES into a MPEG-2 transport stream. The image capture apparatus records the MPEG-2 program stream on a random-access recording medium, and transmits the MPEG-2 transport stream to an external device. The conversion from the video PES into the MPEG-2 program stream and the conversion from the video PES into the MPEG-2 transport stream are performed in parallel thereby enabling the image capture apparatus to perform the recording of the MPEG-2 program stream and the transmission of the MPEG-2 transport stream in parallel.Type: GrantFiled: June 9, 2004Date of Patent: March 30, 2010Assignee: Canon Kabushiki KaishaInventor: Akihiro Oishi
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Patent number: 7606433Abstract: In an encoding apparatus or an encoding method, motion-image data is input, an encoding parameter is output such that a predetermined number of codes are used for encoding the input motion-image data in units of predetermined sizes, the output encoding parameter is stored in a storage medium, and the input motion-image data is encoded by adaptively selecting the output encoding parameter or the encoding parameter stored in the storage medium.Type: GrantFiled: June 17, 2005Date of Patent: October 20, 2009Assignee: Canon Kabushiki KaishaInventor: Akihiro Oishi