Patents by Inventor Wei-Kuo Lee
Wei-Kuo Lee 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: 20100271551Abstract: An image processing apparatus comprises an image decoding unit and a static noise reducing unit. The image decoding unit decodes a data stream and generates a plurality of image comprising a current image. The static noise reducing unit, coupled to the image decoding unit, generates a first adjustment value of a target pixel of the current image according to an original luminance value of the target pixel and at least one original luminance value of a neighboring pixel associated with the target pixel. The static noise reducing unit also determines a static adjustment luminance value of the target pixel according to the original luminance value, the first adjustment value, and a first weight. The first weight is associated with the chrominance value of the target pixel.Type: ApplicationFiled: April 19, 2010Publication date: October 28, 2010Applicant: MSTAR SEMICONDUCTOR, INC.Inventors: Mei-Ju Chen, Jen-Shi Wu, Wei-Kuo Lee
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Publication number: 20100239181Abstract: A device for removing mosquito noise and associated method is provided to adaptively determine a proper strength for removing the mosquito noise according to image complexities, thereby removing the noise while maintaining the quality of image details. The device includes a buffer, a lookup table, and a strength determining unit. The buffer stores a pixel matrix having a target pixel. The lookup table stores a plurality of coefficients. The strength determining unit, coupled to the buffer and the lookup table, detects the image complexities of the pixel matrix and looks up the lookup table according to the image complexities of the pixel matrix, so as to output a strength coefficient for removing the mosquito noise.Type: ApplicationFiled: March 16, 2010Publication date: September 23, 2010Applicant: MStar Semiconductor, Inc.Inventors: Wei-Kuo Lee, Shih-Chang Lai
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Patent number: 7782402Abstract: The present invention provides an apparatus and corresponding method for reducing temporal noise of a target frame and enhancing the motion of the target frame. The apparatus includes a storage device, a temporal noise reducing circuit, and a motion enhancing circuit. The storage device stores a first filtered signal of a previous frame. The previous frame is previous to the target frame. The temporal noise reducing circuit reduces temporal noise of the target frame according to the first filtered signal and an image signal of the target frame. The temporal noise reducing circuit then generates a second filtered signal of the target frame, which is stored in the storage device. The motion enhancing circuit enhances the motion of the target frame according to the first and the second filtered signals, and generates a motion-enhanced signal of the target frame.Type: GrantFiled: July 12, 2006Date of Patent: August 24, 2010Assignee: MStar Semiconductor, Inc.Inventors: Wei-Kuo Lee, Shih-Chung Wang, Yi-Fan Chen
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Publication number: 20100091195Abstract: A de-ringing device and a method thereof are provided. The de-ringing device, operative with a lookup table for storing a plurality of intensity coefficients, comprises a buffer and a de-ringing intensity determining unit. The buffer stores an input pixel sequence. The lookup table stores a plurality of intensity coefficients. The de-ringing intensity determining unit, coupled to the buffer and the lookup table, detects a plurality of pixel complexity of a first pixel group and a second pixel group associated with a target pixel in the pixel sequence, and looks up the lookup table according to the pixel complexities of the first pixel group and the second pixel group to output a de-ring intensity coefficient for the target pixel.Type: ApplicationFiled: October 8, 2009Publication date: April 15, 2010Applicant: MStar Semiconductor, Inc.Inventors: Wei-Kuo Lee, Shih-Chang Lai, Po-Ming Chen
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Publication number: 20090316023Abstract: The present invention provides a noise reduction method and apparatus for use in reducing noise of a digital image. The noise reduction apparatus comprises a threshold value generating unit, a determining unit, and an adjusting unit. The threshold value generating unit generates a noise threshold value according to a target window and a first chrominance value and a second chrominance value of an input pixel of the image. The determining unit determines whether the input pixel needs to be adjusted according to the noise threshold value and pixel values of neighboring pixels of the input pixel. The adjusting unit adjusts the pixel value of the input pixel when the input pixel is determined as needing to be adjusted. Using the noise reduction apparatus of the present invention, not only noise of a digital image can be identified, but also the degradation caused by the noise can be reduced and thus the overall picture quality can be improved.Type: ApplicationFiled: September 1, 2009Publication date: December 24, 2009Applicant: MSTAR SEMICONDUCTOR INC.Inventors: WEI-KUO LEE, YUN-HUNG SHEN, JI-WEI WAN
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Publication number: 20090310884Abstract: The present invention provides a noise reduction method for use in reducing noise of a digital image, the method comprising steps of: providing a plurality of luminance threshold values; determining a plurality of luminance feature values according to the luminance value of a target pixel and the luminance values of neighboring pixels of the target pixel; determining whether the target pixel is a noise point based on the comparison between each of the luminance feature values and each of the luminance threshold values corresponding thereto, respectively; and adjusting the luminance value, a first chrominance value and a second chrominance value of the target pixel if the target pixel is determined as a noise point. Using the noise reduction method of the present invention, not only noise of a digital image can be identified, but also the degradation caused by the noise can be reduced and thus the overall picture quality can be improved.Type: ApplicationFiled: August 20, 2009Publication date: December 17, 2009Applicant: MSTAR SEMICONDUCTOR, INC.Inventors: Wei-Kuo Lee, Yun-Hung Shen
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Publication number: 20090309980Abstract: An image acquiring device with positioning assisting functionality is for acquiring an image of an object to be captured, and includes a positioning assisting unit and an image acquiring unit. The positioning assisting unit emits light toward a planar surface. The light forms at least one positioning mark on the planar surface. The image acquiring unit is for acquiring an image of an image acquiring region associated with the positioning mark.Type: ApplicationFiled: April 9, 2009Publication date: December 17, 2009Inventors: Chia-Hsien Li, Wei Kuo Lee, Kuo Kun Lin
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Patent number: 7633555Abstract: A method and a device for automatic color correction by defining an operation window, a target window, and an active region bounded by the preceding windows so as to adjust chroma values in the active region. Correction of chroma signals is associated with a window region rather than a certain point. Besides, the present invention provides correction of the chroma signals so as to prevent image discontinuity and disharmony.Type: GrantFiled: September 14, 2005Date of Patent: December 15, 2009Assignee: MStar Semiconductor, Inc.Inventors: Kung-Tsun Yang, Wei-Kuo Lee, Yun-Hong Shen
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Patent number: 7633557Abstract: The present invention relates to a method and a device for adaptive color correction by weighting procedure according to the pixel luminance so as to adjust the pixel chrominance. The present invention prevents color noise occurring in the dark pictures. The method for adaptive color correction, comprises steps of: providing a luminance value of a pixel: determining a weighting value corresponding to said luminance value of said pixel, wherein said weighting value substantially increases when said luminance value increases; and adjusting chrominance of said pixel according to said weighting value.Type: GrantFiled: September 2, 2005Date of Patent: December 15, 2009Assignee: MSTAR Semiconductor, Inc.Inventors: Wei-Kuo Lee, Yi-Fan Chen
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Publication number: 20090296329Abstract: A slide type electronic device includes a first device body, a second device body stacked on the first device body, and a slide mechanism provided between the first and second device bodies. The first device body has first and second input interfaces located at different positions. The slide mechanism enables the second device body to slide relative to the first device body in different directions to permit access to one of the first and second input interfaces.Type: ApplicationFiled: January 23, 2009Publication date: December 3, 2009Applicant: WISTRON CORPORATIONInventors: Chu-Chia Tsai, Wei-Kuo Lee, Kuo-Kun Lin
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Patent number: 7535482Abstract: A device includes a plurality of luminance adjustment tables, a luminance analysis unit for analyzing a luminance distribution of a plurality of pixels of a source video, and a dynamic luminance curve fitting unit electrically connected to the luminance analysis unit and the luminance adjustment tables for adjusting luminance levels of the pixels of the video based on one of the luminance adjustment tables selected according to the luminance distribution.Type: GrantFiled: March 11, 2005Date of Patent: May 19, 2009Assignee: MStar Semiconductor, Inc.Inventors: Wei-Kuo Lee, Her-Ming Jong, An-Chen Teng
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Publication number: 20090059080Abstract: Device and method for color adjustment for adjusting white color of an image including a weight generating unit, a color shift value generating unit, and an adjustment unit. The weight generating unit receives a first color value of the image and generates a weight according to the first color value. The color shift value generating unit receives the first color value and the weight and generates a color shift value according to the first color value and the weight. The adjustment unit receives the first color value and the color shift value and generates a second color value according to the first color value and the color shift value.Type: ApplicationFiled: August 18, 2008Publication date: March 5, 2009Applicant: MSTAR SEMICONDUCTOR, INC.Inventors: Yi Fan Chen, Wei Kuo Lee
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Publication number: 20090051817Abstract: The present invention discloses a method and a device for image sharpness adjustment. The device comprises a color analyzer, a color sharpness setting unit, a computing circuit, and a luminance adjusting unit. The color analyzer is for analyzing an input color signal to generate a plurality of color flags. The color sharpness setting unit is for generating a plurality of first sharpness gains according to the plurality of the color flags. The computing circuit is for generating a second sharpness gain according to the plurality of the first sharpness gains and the input color signal. The luminance adjusting unit is for adjusting a luminance signal according to the second sharpness gain.Type: ApplicationFiled: August 14, 2008Publication date: February 26, 2009Applicant: MSTAR SEMICONDUCTOR, INC.Inventors: YI-FAN CHEN, WEI-KUO LEE
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Patent number: 7453524Abstract: The present invention discloses a method and a device for image contrast enhancement by taking the contribution of image chroma into account so as to define the luminance signal with the chroma weighted value. The new defined luminance signal can be applied towards expressing the image's parameters of original luminance signal and compensated chroma signal, through means of a statistic histogram extraction and the ratio relationship between before and after luminance curve process. Therefore, pictures can be provided with better saturation for satisfying the viewer's requirements, as observed from the process of the present invention.Type: GrantFiled: October 7, 2005Date of Patent: November 18, 2008Assignee: Mstar Semiconductor, Inc.Inventors: Wei-Kuo Lee, Joseph Lue
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Publication number: 20080226918Abstract: A cable comprising one or more electrical conductors or communications media or a core of two or more electrical conductors or communications media, each electrical conductor, communications medium, or core being surrounded by a layer comprising: (a) polyethylene; polypropylene; or mixtures thereof; (b) carbon nanotubes; (c) a conductive carbon black other than carbon nanotubes; and (d) optionally, a copolymer of acrylonitrile and butadiene wherein the acrylonitrile is present in an amount of about 30 to about 60 percent by weight based on the weight of the copolymer or a silicone rubber.Type: ApplicationFiled: April 8, 2008Publication date: September 18, 2008Applicant: Union Carbide Chemicals & Plastics Technology CorporationInventors: Wei-Kuo Lee, Marios Avgousti, Suh Joon Han
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Publication number: 20080212875Abstract: A compressive overdrive circuit includes: a compression unit for compressing a current frame to generate compressed data for buffering, where the compressed data comprises pixel values of a plurality of non-encoded pixels and a plurality of index values associated with the non-encoded pixels; and a decompression unit for decompressing according to the pixel values of the non-encoded pixels and the index values to generate data of a previous frame. The overdrive circuit performs overdrive processing according to the current frame and the previous frame.Type: ApplicationFiled: January 10, 2008Publication date: September 4, 2008Inventors: Wei-Kuo Lee, Shih-Chang Lai
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Patent number: 7405771Abstract: The present invention discloses a method and a device for independent color management by using a look-up table (LUT) so as to adjust the color saturation of a single color independently. The method comprises steps of: receiving a color signal of an input pixel; determining color flags and initial saturation values from the color signal by using a look-up table (LUT); obtaining user-controlled color gains according to the color flags; multiplying each of the initial saturation values with one of the corresponding user controlled color gains so as to output an adjusted saturation value; determining a final gain from each the adjusted saturation value by bilinear interpolation according lower-bits of the color signal; and obtaining a new color signal according to the final gain and the color signal.Type: GrantFiled: October 18, 2004Date of Patent: July 29, 2008Assignee: Mstar Semiconductor Inc.Inventors: Wei-Kuo Lee, Yi-Fan Chen, Her-Ming Jong
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Publication number: 20080166060Abstract: The present invention discloses an adaptively de-blocking circuit and associated method. A mean is derived according to the neighboring pixels surrounding a central pixel of an image. A blending factor is determined according to a flatness of the image. An updated pixel value of the central pixel is determined by blending the original pixel value of the central pixel and the mean according to the blending factor. Finally, alternatively output the updated pixel value and the original pixel value of the central pixel in response to a block border signal.Type: ApplicationFiled: January 10, 2008Publication date: July 10, 2008Inventors: Wei-Kuo Lee, Chien-Chih Chen, Shih-Chang Lai, Hsiang-Chun Lin
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Patent number: 7390970Abstract: A cable comprising one or more electrical conductors or communications media or a core of two or more electrical conductors or communications media, each electrical conductor, communications medium, or core being surrounded by a layer comprising: (a) polyethylene; polypropylene; or mixtures thereof; (b) carbon nanotubes; (c) a conductive carbon black other than carbon nanotubes; and (d) optionally, a copolymer of acrylonitrile and butadiene wherein the acrylonitrile is present in an amount of about 30 to about 60 percent by weight based on the weight of the copolymer or a silicone rubber.Type: GrantFiled: March 30, 2004Date of Patent: June 24, 2008Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Wei-Kuo Lee, Marios Avgousti, Suh Joon Han
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Patent number: 7298309Abstract: A digital-to-analog converter (DAC) for generating an analog output voltage according to a digital input value includes a plurality of pulse width modulation (PWM) units and a voltage generating unit. The digital input value includes a plurality of bit segments. The plurality of PWM units generates a plurality of PWM signals according to the plurality of bit segments of the digital input value. The voltage generating unit is coupled to the plurality of PWM units and generates the analog output voltage according to the plurality of PWM signals.Type: GrantFiled: August 16, 2006Date of Patent: November 20, 2007Assignee: MStar Semiconductor, Inc.Inventors: Shuang-Chin Wu, Wei-Kuo Lee