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1. 发明授权

US5268967A Method for automatic foreground and background detection in digital radiographic images 失效
标题翻译：数字放射影像自动前景和背景检测方法
公开(公告)号：US5268967A
公开(公告)日：1993-12-07
申请号：US906191
申请日：1992-06-29
申请人： Ben K. Jang , Ralph Schaetzing
发明人： Ben K. Jang , Ralph Schaetzing
IPC分类号： A61B6/00 , G01B15/00 , G06T1/00 , G06T5/00 , G06T7/60 , G06K9/34 , G06F15/42
CPC分类号： G06T7/0081 , G06T7/0012 , G06T2207/10116 , G06T2207/20141 , G06T2207/20144 , G06T2207/30004
摘要： A digital image processing method automatically separates (segments) the desired regions in a digital radiographic image (i.e., the body part being imaged) from the undesired regions (background areas around the body part that have received unattenuated radiation or foreground areas that have received very little radiation due to the use of radiation limiting devices). The method includes the steps of edge detection, block generation, block classification, block refinement and bit map generation.
摘要翻译：数字图像处理方法将数字放射线照相图像（即正在成像的身体部分）中的期望区域自动地分离（分段）不期望的区域（身体部分周围的接收未衰减的辐射或已经接收的前景区域的背景区域由于使用辐射限制装置而导致的辐射很少）。该方法包括边缘检测（24），块生成（26），块分类（28），块细化（30）和位图生成（32）的步骤。

2. 发明授权

US5892840A Method and apparatus for irradiation field detection in digital radiographic images 失效
标题翻译：用于数字放射照相图像中的照射场检测的方法和装置
公开(公告)号：US5892840A
公开(公告)日：1999-04-06
申请号：US608834
申请日：1996-02-29
申请人： Ben K. Jang , Thomas R. Mergler
发明人： Ben K. Jang , Thomas R. Mergler
IPC分类号： G06T5/00 , G06K9/46
CPC分类号： G06T7/0081 , G06T7/0012 , G06T2207/10116 , G06T2207/20144 , G06T2207/30004
摘要： An automated method and apparatus are disclosed for detecting the irradiation field of a radiographic image, wherein digital image data is acquired and subjected to multiple phases of digital imaging processes. The image is first acquired by a radiation image recording apparatus through a landmark-synthesizing device that generates landmark patterns on the acquired image. These patterns are indicative of where the irradiation field is located, and are subsequently detected by digital image processing techniques. Next, the irradiation field is robustly and efficiently identified through these landmark patterns. An irradiation map is then created that functions as a template for any further image processing to be done on the irradiation field. Once the irradiation field is identified, the landmark patterns are removed from the acquired image using digital image processing techniques if desired. Finally, a mask image is generated to reduce the flare effect of the output image in areas that have received very little radiation, making the output image both diagnostically useful and aesthetically pleasing.
摘要翻译：公开了一种用于检测放射线照相图像的照射场的自动化方法和装置，其中获取数字图像数据并进行数字成像处理的多个阶段。首先通过辐射图像记录装置通过在所获取的图像上产生标记图案的地标合成装置获取图像。这些图案表示照射场所处的位置，并且随后通过数字图像处理技术检测。接下来，通过这些标记图案强烈地且有效地识别照射场。然后产生照射图，其用作用于在照射场上进行的任何进一步图像处理的模板。一旦识别出照射场，如果需要，使用数字图像处理技术从所获取的图像中去除地标图案。最后，产生掩模图像以减少输出图像在已经接收到非常少的辐射的区域中的耀斑效果，使得输出图像在诊断上是有用的并且在美学上令人愉快。

3. 发明授权

US5757953A Automated method and system for region decomposition in digital radiographic images 失效
标题翻译：数字放射摄影图像中区域分解的自动化方法和系统
公开(公告)号：US5757953A
公开(公告)日：1998-05-26
申请号：US608899
申请日：1996-02-29
申请人： Ben K. Jang
发明人： Ben K. Jang
IPC分类号： G06K9/46 , G06T5/00 , G06K9/00
CPC分类号： G06K9/342 , G06K9/4638 , G06T7/0012 , G06T7/0081 , G06T7/0091 , G06K2209/05 , G06T2207/10116 , G06T2207/20016 , G06T2207/30061
摘要： A digital radiographic image is segmented into various regions and a region thereof is further decomposed into subregions, wherein digital image data is acquired and subjected to multiple phases of digital imaging processes. The region decomposition method first uses progressively smoothing techniques to generate smoothed regions at multiple scales. Next, the number of connected components at each scale is computed for each smoothed region. A shape spectrum, which is the number of connected components as a function of scale, is subsequently constructed to determine the most stable range of scales and the most stable number of subregions into which the region is decomposed. Each pixel is then classified into subregions, according to the geometrical relationship of the connected components detected at most stable scales. Finally, a decomposed map is generated to function as multivalued templates for any further image processing to be done on various decomposed subregions.
摘要翻译：数字放射线照相图像被分割成各个区域，并且其区域被进一步分解成子区域，其中获取数字图像数据并进行数字成像处理的多个阶段。区域分解方法首先使用渐进平滑技术在多个尺度上产生平滑区域。接下来，针对每个平滑区域计算每个刻度处的连接分量的数量。随后构造形状谱，其是作为刻度的函数的连接分量的数量，以确定最稳定的尺度范围和该区域被分解成的最稳定的子区域数量。根据在最稳定的尺度上检测到的连通部件的几何关系，将每个像素分类为子区域。最后，生成分解的映射以用作用于在各种分解的子区域上进行的任何进一步的图像处理的多值模板。

4. 发明授权

US5978518A Image enhancement in digital image processing 失效
标题翻译：数字图像处理中的图像增强
公开(公告)号：US5978518A
公开(公告)日：1999-11-02
申请号：US804998
申请日：1997-02-25
申请人： Olorunfunmi A. Oliyide , Richard L. VanMetter , Roger S. Gaborski , Ben K. Jang
发明人： Olorunfunmi A. Oliyide , Richard L. VanMetter , Roger S. Gaborski , Ben K. Jang
IPC分类号： G06T5/00 , G06T5/40 , G06K9/40
CPC分类号： G06T5/40 , G06T5/002 , G06T5/007 , G06T2207/20016 , G06T2207/20212
摘要： A method for enhancing a digital image comprises the following steps.1. Providing a digital image.2. Decomposing the image into a multiresolution representation having low frequency images and high frequency images.3. Performing dynamic range modification on the low frequency images.4. Modifying the high frequency images with a method incorporating noise estimation, anatomical regions of importance, and edge estimation, such modification being a combination of attenuation and amplification.5. Combining the processed resolution images to form a resulting image.6. Shifting the pixel values of the resulting image to map the values into a desired range.7. Applying a tonescale to the shifted image for display.
摘要翻译：一种用于增强数字图像的方法包括以下步骤。提供数字图像。将图像分解成具有低频图像和高频图像的多分辨率表示。 3.对低频图像进行动态范围修改。 4.使用包含噪声估计，重要解剖区域和边缘估计的方法来修改高频图像，这种修改是衰减和放大的组合。 5.组合处理后的分辨率图像，形成一个结果图像。 6.移动所得图像的像素值，将值映射到所需的范围内。 7.将色阶应用于移动后的图像进行显示。

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