Patent application number | Description | Published |
20090148003 | BLOCK-BASED NOISE DETECTION AND REDUCTION METHOD WITH PIXEL LEVEL CLASSIFICATION GRANULARITY - A method of detecting noise in an image ( | 06-11-2009 |
20090148039 | COLOUR DOCUMENT LAYOUT ANALYSIS WITH MULTI-LEVEL DECOMPOSITION - Disclosed is a method of classifying segmented contents of a scanned image of a document. The method comprise partitioning the scanned image into colour segmented tiles at pixel level. The method then generates superpositioned segmented contents, each segmented content representing related colour segments in at least one colour segmented tile. Statistics are then calculated for each segmented content using pixel level statistics from each of the tile colour segments included in segmented content, and then determines a classification for each segmented content based on the calculated statistics. The segmented content may be macroregions. The macroregions may form part of a multi-layered document representation of the document. Each of a plurality of tiles of predetermined size of the image are converted into a representation having a plurality of layers, the representation corresponding to at least one said tiles comprising multiple coloured layers, each tile comprising a superposition of the corresponding coloured layers. For each of the coloured layers, merging is performed with adjacent ones of the tiles, thereby generating a multi-layered document representation. | 06-11-2009 |
20100157340 | OBJECT EXTRACTION IN COLOUR COMPOUND DOCUMENTS - Disclosed is a computer implemented method of text extraction in colour compound documents. The method connects similarly coloured pixels of an image of a colour compound document into connected components (CCs); classifies each CC as either text or non-text; refines the text CC classification for each text CC using global colour context statistics; groups text CCs into text blocks; recovers misclassified non-text CCs into a nearby text block; and removes extraneous CCs from each text block using local colour context statistics to thereby provide the extracted text in the text blocks. Also disclosed is a computer implemented method of locating graphics objects in a colour compound document image. The method connects similarly coloured pixels of said image into connected components (CCs) and placing the CCs in an enclosure tree; classifies ( | 06-24-2010 |
20100246951 | COLOUR CORRECTING FOREGROUND COLOURS FOR VISUAL QUALITY IMPROVEMENT | 09-30-2010 |
20120155754 | Finding text regions from coloured image independent of colours | 06-21-2012 |
20130155475 | DETERMINING TRANSPARENT FILLS BASED ON A REFERENCE BACKGROUND COLOUR - Disclosed is a method of generating an electronic document having an enclosed region with a fill colour. The method receives a digital representation of a source document, the source document containing an enclosed region and at least one corresponding background region, the enclosed region overlapping at least a portion of the background region. A fill colour is determined for the enclosed region from the digital representation as is a reference background colour for the enclosed region from the corresponding background region of the digital representation. The method assigns a transparent fill colour to the enclosed region based on a comparison of the determined fill colour for the enclosed region with the reference background colour and stores enclosed region with the transparent fill colour to generate an electronic document. | 06-20-2013 |
Patent application number | Description | Published |
20090089349 | Angle Computation Method and Related Circuit - Computing an angle between a real part and an imaginary part of a complex number includes receiving complex number data; generating a first value, a second value and a determination result according to the complex number data; choosing a dividend and a divisor of a division operation from the first value and the second value for generating a division result according to magnitudes of the first value and the second value; performing table look-up for the division result to generate a table look-up result according to a preserved table; and adjusting the table look-up result for generating an angle corresponding to the complex number data according to the determination result. | 04-02-2009 |
20100124175 | Apparatus and method for adaptively calculating symbolic start position - An apparatus and a method for adaptively calculating a start position of a series of symbols are provided. The method is applied to a frame synchronization circuit that implements the apparatus for calculating the symbolic start position of a packet-switching communication system. Even under the situations such as higher frequency offset, the frequency offset value approaching zero or unstable frequency offset, the frame synchronization circuit using the claimed method still can estimate the symbolic start position. The preferred method includes a first step of retrieving the signals in a unit of packets, and calculating their delay correlation value. Next, a control circuit is incorporated to retrieve multiple groups of symbols, and to set the parameters of the systems as a basis for identifying the system's property. After that, it's to estimate the symbolic start position. | 05-20-2010 |
20120165878 | Bone Plate Structure - The present invention discloses an approximately π-shaped improved bone plate structure, fixed on a bone of an animal for maintaining the relative positions of different portions of the bone. One of the other features of the present invention is that bone plate structure comprises at least one contouring portion for allowing the surgeons to intra-operatively adjusting the shape in accordance with the shape of the bone. Furthermore, the present invention may fit the bone with multi-axis, decreasing stress concentration, preventing the opening portion from being unsuitably covered and preventing the wound deformation from being pressed. | 06-28-2012 |
Patent application number | Description | Published |
20080278212 | DC OFFSET CANCELING CIRCUIT - The present invention provides a circuit for canceling DC offset, comprising: a first circuit accumulating a first square value of a plurality of signal values in a time period; a second circuit calculation a second square value of an accumulation of said signal values in said time period, wherein said square value is divided by a quantity of said signal values in said time period to generate a DC offset value; and a third circuit, connected to said first circuit and second circuit, calculating a difference between said first square value and said DC offset value. | 11-13-2008 |
20080298223 | PACKET DETECTING CIRCUIT AND METHOD THEREOF - A packet detecting circuit detects a packet inputting time via calculating a delay correlation function and an autocorrelation function. In order to prevent a DC offset from affecting the calculation of the delay correlation function and the autocorrelation function, when the packet detecting circuit calculates the delay correlation function and the autocorrelation function, the packet detecting circuit will calculate and remove the error of the delay correlation function and the autocorrelation function produced by a DC offset. Then the packet detecting circuit calculates a packet triggering value according to the delay correlation function and the autocorrelation function for detecting the packet inputting time more precisely. | 12-04-2008 |
20080298266 | METHOD AND SYSTEM FOR ASSESSING STATUSES OF CHANNELS - An assessment system classifies a plurality of channels to several channel groups according to the characteristics of the channel groups and assesses the status of each channel by a corresponding method, such as a period comparison method or a SNR comparison method, defined based on the channel groups. Hence, the present invention allows simpler computations to be made and a simpler circuit structure to be used. | 12-04-2008 |
20090092179 | Method and a circuit for estimating the signal quality of a communication channel and a wireless receiving apparatus using the same - A method for estimating the signal quality of a communication channel is disclosed. Firstly, an input signal passes through a match filter at the initial stage of an estimation period. Next, the output of the match filter is calculated to obtain the noise reference value within a pre-determined period. The output value of the match filter and the noise reference value are compared. When the output value of the match filter is larger than the noise reference value, a valid power value is obtained according to the output value of the match filter. The valid power values are accumulated. Finally, a SNR is calculated according to the noise reference value and the accumulated valid power value at the end of the estimation period. Thereby, the signal quality of the wireless communication channel is estimated according to the SNR, and the signal transmission rate is determined. | 04-09-2009 |
20090135978 | Apparatus and method for estimating and compensating sampling frequency offset - An apparatus and method for estimating and compensating sampling frequency offset are disclosed. Particularly, a linear mathematical scheme is employed to calculate the related phase difference for saving use of multipliers and storage circuit used for sampling frequency offset estimation and compensation in the conventional art. The preferred embodiment of the invention has a first step to receive signals by the offset estimating circuit. Next, the phase value for each signal is calculated, and the pilot signal therein is retrieved. Next, a phase difference is obtained by subtraction operation between the received symbols and the delayed pilot symbols. And a circuit for storing the phase differences is incorporated. Next, a phase difference between the adjacent symbols is obtained by accumulating the phases and processing the least-error-sum-of-squares operation. Therefore, an estimation value of the sampling frequency offset of a communication system is obtained, and further to compensate the offset. | 05-28-2009 |
20090154618 | Device and method for calculating Channel State Information - Device and method for calculating channel state information (CSI) are disclosed. The device and method are applied to calculate the channel state information of a dual-carrier modulation system. When a channel equalization value is transmitted into this system, an absolute-value computing unit computes the absolute value for each equalization value. The absolute-value computing unit is electrically connected to a channel classifying unit that is used to separate signals to two channels. Every channel is connected to the equalization-value comparing unit. One smaller value resulted from a comparison operation is employed as the new-defined CSI for these two channels. Afterward, this CSI can be used in a decoder for enhancing the performance of dual-carrier modulation system in a multi-path fading channel. | 06-18-2009 |