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    • 4. 发明申请
    • PERFORMING ENHANCED SIGMA-DELTA MODULATION
    • 执行增强的SIGMA-DELTA调制
    • WO2012074941A1
    • 2012-06-07
    • PCT/US2011/062270
    • 2011-11-28
    • QUALCOMM INCORPORATEDLEE, Chong U.REZNIK, YuriyHONG, John H.
    • LEE, Chong U.REZNIK, YuriyHONG, John H.
    • H03M3/02G10L19/04
    • H03M3/492H03M3/422H03M3/456
    • In general, techniques are described for performing enhanced sigma-delta modulation. For example, an apparatus comprising a predictive filter unit, an amplifier, an oversampling unit and a sigma-delta modulation unit may implement the techniques. The predictive filter unit performs predictive filtering on an input signal to generate a filtered signal and computes an estimate of a predictive gain as a function of an energy of the input signal and an energy of the filtered signal. The amplifier receives the filtered signal and amplifies the filtered signal based on the predictive gain to generate an amplified signal. The oversampling unit receives the amplifies signal and performs oversampling in accordance with an oversampling rate to generate an oversampled signal. The sigma-delta modulation unit receives the oversampled signal and performs sigma-delta modulation to generate a modulated signal.
    • 通常,描述了用于执行增强的Σ-Δ调制的技术。 例如,包括预测滤波器单元,放大器,过采样单元和Σ-Δ调制单元的装置可以实现这些技术。 预测滤波器单元对输入信号执行预测滤波以产生经滤波的信号,并且计算作为输入信号的能量和滤波信号的能量的函数的预测增益的估计。 放大器接收经过滤波的信号,并根据预测增益对滤波信号进行放大,以产生放大信号。 过采样单元接收放大信号,并根据过采样率进行过采样以产生过采样信号。 Σ-Δ调制单元接收过采样信号并执行Σ-Δ调制以产生调制信号。
    • 6. 发明申请
    • FEATURE MATCHING BY CLUSTERING DETECTED KEPOINTS IN QUERY AND MODEL IMAGES
    • 通过在查询和模型图像中聚类检测的KEPOIN的特征匹配
    • WO2011069021A3
    • 2011-08-18
    • PCT/US2010058805
    • 2010-12-02
    • QUALCOMM INCVADDADI SUNDEEPHONG JOHN HHAMSICI ONUR CREZNIK YURIYLEE CHONG U
    • VADDADI SUNDEEPHONG JOHN HHAMSICI ONUR CREZNIK YURIYLEE CHONG U
    • G06K9/64
    • G06K9/6211
    • A method for feature matching in image recognition is provided. First, image scaling may be based on a feature distribution across scale spaces for an image to estimate image size/resolution, where peak(s) in the keypoint distribution at different scales is used to track a dominant image scale and roughly track object sizes. Second, instead of using all detected features in an image for feature matching, keypoints may be pruned based on cluster density and/or the scale level in which the keypoints are detected. Keypoints falling within high-density clusters may be preferred over features falling within lower density clusters for purposes of feature matching. Third, inlier-to-outlier keypoint ratios are increased by spatially constraining keypoints into clusters in order to reduce or avoid geometric consistency checking for the image.
    • 提供了一种图像识别中的特征匹配方法。 首先,图像缩放可以基于用于图像的尺度空间上的特征分布来估计图像尺寸/分辨率,其中使用不同尺度的关键点分布中的峰值来跟踪主要图像尺度并粗略地跟踪对象尺寸。 第二,不是使用图像中的所有检测到的特征来进行特征匹配,而是可以基于簇密度和/或检测关键点的比例级别来修剪关键点。 落入高密度簇内的关键点可能优于落入低密度簇内的特征,用于特征匹配。 第三,通过空间约束关键点进入群集来增加从早到晚的关键点比例,以便减少或避免图像的几何一致性检查。
    • 8. 发明申请
    • ACTUATION AND CALIBRATION OF A CHARGE NEUTRAL ELECTRODE IN AN INTERFEROMETRIC DISPLAY DEVICE
    • 间断显示器件中充电中性电极的启动和校准
    • WO2012024238A1
    • 2012-02-23
    • PCT/US2011/047790
    • 2011-08-15
    • QUALCOMM MEMS TECHNOLOGIES, INC.HONG, John, H.LEE, Chong, U.
    • HONG, John, H.LEE, Chong, U.
    • G09G3/34G02B26/00
    • G09G3/3466G02B26/001G02B26/0841G09G2300/0426G09G2310/06G09G2320/0252G09G2320/0693
    • This disclosure provides systems, methods, and devices for actuating, charging and calibrating the charge on a movable electrode in interferometric devices. The interferometric device can include a first electrode (1002), a second electrode (1010) spaced apart from the first electrode by a gap, a complementary electrode, at least one electrical contact (2132), and a movable third electrode (1006) disposed between the first electrode and the second electrode. In one implementation, a method of calibrating charge on the movable electrode of the EMS device includes electrically connecting a complementary electrode to the first electrode to form a compound electrode and applying a calibration voltage across the compound electrode and the second electrode to produce a uniform electric field in the gap. Under the electric field the third electrode moves towards the first electrode until it connects with the at least one electrical contact. Once in contact with the electrical contact, an electrical charge on the third electrode can be changed and calibrated when the third electrode is in a second position. When a mechanical restorative force on the third electrode exceeds the electric force of the uniform electric field on the third electrode, the third electrode then moves to a third position.
    • 本公开提供用于在干涉测量装置中用于致动,充电和校准可移动电极上的电荷的系统,方法和装置。 干涉测量装置可以包括第一电极(1002),通过间隙与第一电极间隔开的第二电极(1010),互补电极,至少一个电触头(2132)和可移动的第三电极(1006) 在第一电极和第二电极之间。 在一个实施方式中,一种校准EMS装置的可移动电极上的电荷的方法包括将互补电极与第一电极电连接以形成复合电极,并且在复合电极和第二电极之间施加校准电压以产生均匀的电 领域的差距。 在电场下,第三电极朝向第一电极移动,直到其与至少一个电触头相连。 一旦与电触点接触,当第三电极处于第二位置时,可以改变和校准第三电极上的电荷。 当第三电极上的机械修复力超过第三电极上的均匀电场的电力时,第三电极移动到第三位置。
    • 9. 发明申请
    • DAISY DESCRIPTOR GENERATION FROM PRECOMPUTED SCALE - SPACE
    • DAISY描述符从预先规定的空间生成 - 空间
    • WO2011133714A1
    • 2011-10-27
    • PCT/US2011/033316
    • 2011-04-20
    • QUALCOMM INCORPORATEDHAMSICI, OnurHONG, John H.REZNIK, YuriyVADDADI, SundeepLEE, Chong
    • HAMSICI, OnurHONG, John H.REZNIK, YuriyVADDADI, SundeepLEE, Chong
    • G06K9/46
    • G06K9/4671
    • A local feature descriptor for a point in an image is generated over multiple levels of an image scale space. The image is gradually smoothened to obtain a plurality of scale spaces. A point may be identified as the point of interest within a first scale space from the plurality of scale spaces. A plurality of image derivatives is obtained for each of the plurality of scale spaces. A plurality of orientation maps is obtained (from the plurality of image derivatives) for each scale space in the plurality of scale spaces. Each of the plurality of orientation maps is then smoothened (e.g., convolved) to obtain a corresponding plurality of smoothed orientation maps. Therefore, a local feature descriptor for the point may be generated by sparsely sampling a plurality of smoothed orientation maps corresponding to two or more scale spaces from the plurality of scale spaces.
    • 图像中的一个点的局部特征描述符是通过图像比例空间的多个级别生成的。 图像逐渐平滑以获得多个刻度空间。 点可以被识别为来自多个刻度空间的第一刻度空间内的兴趣点。 为多个刻度空间中的每一个获得多个图像导数。 对于多个刻度空间中的每个刻度空间,获得多个取向图(来自多个图像衍生)。 然后对多个取向图中的每一个进行平滑(例如,卷积)以获得相应的多个平滑取向图。 因此,可以通过从多个比例空间中稀疏采样对应于两个或更多比例空间的多个平滑取向图来生成该点的局部特征描述符。