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    • 1. 发明授权
    • Gabor filtering for improved microcalcification detection in digital
mammograms
    • Gabor滤波,用于改进数字乳腺X线照片中的微钙化检测
    • US6137898A
    • 2000-10-24
    • US200128
    • 1998-11-25
    • Randy P. BroussardThomas F. RathbunSteven K. Rogers
    • Randy P. BroussardThomas F. RathbunSteven K. Rogers
    • A61B6/00G06K9/38G06K9/62G06T5/20G06T7/00G06K9/00
    • B29C49/0021B25J15/04G06K9/38G06K9/4609G06K9/6254G06T5/20G06T7/0012G06T7/402A61B6/502B29C2791/006B29C2791/007B29L2023/18G06K2209/05G06T2207/20081G06T2207/20084G06T2207/20141G06T2207/30068
    • A method and system for detecting and displaying clustered microcalcifications in a digital mammogram, wherein a single digital mammogram is first automatically cropped to a breast area sub-image which is then processed by means of an optimized Difference of Gaussians filter to enhance the appearance of potential microcalcifications in the sub-image. The potential microcalcifications are thresholded, clusters are detected, features are computed for the detected clusters, and the clusters are classified as either suspicious or not suspicious by means of a neural network. Thresholding is preferably by sloping local thresholding, but may also be performed by global and dual-local thresholding. The locations in the original digital mammogram of the suspicious detected clustered microcalcifications are indicated. Parameters for use in the detection and thresholding portions of the system are computer-optimized by means of a genetic algorithm. The results of the system are optimally combined with a radiologist's observation of the original mammogram by combining the observations with the results, after the radiologist has first accepted or rejected individual detections reported by the system. An alternative embodiment reduces false positive detections by means of Gabor filtering the cropped mammogram image to identify elongated structures such as milk ducts and veins. Individual microcalcifications coincident with the elongated structures are removed and the remaining detections grouped into clusters.
    • 一种用于在数字乳腺X线照片中检测和显示聚类微钙化的方法和系统,其中首先将单个数字乳腺X线照片自动裁剪到乳房区域子图像,然后通过优化的高斯差分滤波器处理以增强潜在的外观 子图像中的微钙化。 潜在的微钙化被阈值化,检测到簇,为检测到的簇计算特征,并且通过神经网络将簇分类为可疑的或不可疑的。 阈值优选地通过倾斜的局部阈值来进行,但是也可以通过全局和双局部阈值来执行。 指出了可疑检测到的聚集微量钙化的原始数字乳腺X线照片中的位置。 用于系统的检测和阈值部分的参数通过遗传算法进行计算机优化。 在放射科医师首次接受或拒绝系统报告的个体检测之后,将该系统的结果与放射科医师对原始乳房X线照片的观察结合在一起,结合观察结果与结果。 替代实施例通过Gabor过滤裁剪的乳房X线透射图像来减少假阳性检测以识别细长结构,例如乳管和静脉。 与细长结构重合的单个微钙化被去除,剩余的检测被分组成簇。
    • 2. 发明授权
    • Method for obtaining information about interstitial patterns of the lungs
    • 获取有关肺的间质模式的信息的方法
    • US5513273A
    • 1996-04-30
    • US219431
    • 1994-03-17
    • Wataru Ito
    • Wataru Ito
    • G06T7/40G06T7/00
    • G06T7/402G06T2207/10116G06T2207/20064G06T2207/30061
    • For each picture element in a radiation image of the lungs, a basic Wavelet function is rotated on the radiation image, a degree of contraction of the basic Wavelet function is changed within a predetermined range, and Wavelet transformation is thereby carried out on the image signal, values of a Wavelet transformation factor being thereby calculated. For each value of the degree of contraction, a calculation is made to find a temporary representative value of the values of the Wavelet transformation factor, which have been obtained for each picture element when the degree of contraction was fixed at a predetermined value and the basic Wavelet function was thereby rotated on the radiation image. For each picture element, a representative value is determined from the temporary representative values, which have been calculated for the values of the degree of contraction. Interstitial patterns of the lungs are then rated in accordance with the representative value and the value of the degree of contraction, which was employed in the Wavelet transformation when the representative value was determined.
    • 对于肺的放射线图像中的每个像素,基本的小波函数在辐射图像上旋转,基本小波函数的收缩程度在预定范围内改变,从而对图像信号进行小波变换 由此计算小波变换因子的值。 对于收缩度的每个值,进行计算以找到当收缩程度固定在预定值时对于每个图像元素获得的小波变换因子的值的临时代表值,并且基本 因此,小波函数在辐射图像上旋转。 对于每个图像元素,根据已经针对收缩程度的值计算的临时代表值来确定代表值。 然后根据代表值和收缩程度的值来评估肺的间质模式,当确定代表值时,在小波变换中使用。
    • 3. 发明授权
    • Moisture sensor and windshield fog detector using an image sensor
    • 湿度传感器和挡风玻璃雾度检测器使用图像传感器
    • US5923027A
    • 1999-07-13
    • US931118
    • 1997-09-16
    • Joseph S. StamJon H. BechtelJohn K. Roberts
    • Joseph S. StamJon H. BechtelJohn K. Roberts
    • G01N21/17B60S1/08B60S1/54G01N21/47H04N5/374
    • G06K9/00791B60S1/0822B60S1/0844B60S1/0885B60S1/0888G06T7/402H04N5/225B60S1/0833G06T2207/20056G06T2207/30252Y10S15/15Y10S318/02
    • A control system for automatically detecting moisture on the windshield of a vehicle. The automatic moisture detecting system includes an optical system for imaging a portion of the windshield on to an image array sensor, such as a CMOS active pixel sensor. The voltages of each of the pixels which represents the illumination level is converted to a corresponding gray scale value by an analog digital converter. The gray scale values corresponding to the image are stored in memory. The spatial frequency composition of the gray scale values are analyzed to determine the amount of rain present. In order to provide a control signal to control the operation of the windshield wipers of the vehicle as a function of the amount of moisture present. The system is also adapted to detect the level of fog both on the interior of the windshield as well as the exterior of the windshield. By providing a system for automatically detecting the presence of fog on the interior and exterior of the windshield, serious performance limitations of known automatic rain sensors are eliminated.
    • 一种用于自动检测车辆挡风玻璃上的水分的控制系统。 自动水分检测系统包括用于将挡风玻璃的一部分成像到诸如CMOS有源像素传感器的图像阵列传感器上的光学系统。 通过模拟数字转换器将表示照明电平的每个像素的电压转换成相应的灰度值。 与图像对应的灰度值存储在存储器中。 分析灰度值的空间频率组成以确定存在的雨量。 为了提供控制信号以根据存在的水分的量来控制车辆挡风玻璃刮水器的操作。 该系统还适用于在挡风玻璃的内部以及挡风玻璃的外部上检测雾的水平。 通过提供用于自动检测挡风玻璃内部和外部的雾的系统,消除了已知的自动雨水传感器的严重性能限制。
    • 7. 发明授权
    • Moisture sensor and windshield fog detector
    • 水分传感器和挡风玻璃雾探测器
    • US6097024A
    • 2000-08-01
    • US347093
    • 1999-07-02
    • Joseph S. StamJon H. BechtelJohn K. Roberts
    • Joseph S. StamJon H. BechtelJohn K. Roberts
    • G01N21/17B60S1/08B60S1/54G01N21/47H04N5/374
    • G06K9/00791B60S1/0822B60S1/0844B60S1/0885B60S1/0888G06T7/402H04N5/225B60S1/0833G06T2207/20056G06T2207/30252Y10S15/15Y10S318/02
    • A control system for automatically detecting moisture on the windshield of a vehicle. The automatic moisture detecting system includes an optical system for imaging a portion of the windshield on to an image array sensor, such as a CMOS active pixel sensor. The voltages of each of the pixels which represents the illumination level is converted to a corresponding gray scale value by an analog digital converter. The gray scale values corresponding to the image are stored in memory. The spatial frequency composition of the gray scale values are analyzed to determine the amount of rain present. In order to provide a control signal to control the operation of the windshield wipers of the vehicle as a function of the amount of moisture present. The system is also adapted to detect the level of fog both on the interior of the windshield as well as the exterior of the windshield. By providing a system for automatically detecting the presence of fog on the interior and exterior of the windshield, serious performance limitations of known automatic rain sensors are eliminated.
    • 一种用于自动检测车辆挡风玻璃上的水分的控制系统。 自动水分检测系统包括用于将挡风玻璃的一部分成像到诸如CMOS有源像素传感器的图像阵列传感器上的光学系统。 通过模拟数字转换器将表示照明电平的每个像素的电压转换成相应的灰度值。 与图像对应的灰度值存储在存储器中。 分析灰度值的空间频率组成以确定存在的雨量。 为了提供控制信号以根据存在的水分的量来控制车辆挡风玻璃刮水器的操作。 该系统还适用于在挡风玻璃的内部以及挡风玻璃的外部上检测雾的水平。 通过提供用于自动检测挡风玻璃内部和外部的雾的系统,消除了已知的自动雨水传感器的严重性能限制。