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    • 2. 发明授权
    • Image compression apparatus
    • 图像压缩装置
    • US07627180B2
    • 2009-12-01
    • US10589555
    • 2005-02-15
    • Hiroshi TabuchiAkira TaguchiKazuhiro ShimauchiToshio Morohashi
    • Hiroshi TabuchiAkira TaguchiKazuhiro ShimauchiToshio Morohashi
    • G06K9/36G06K9/46
    • H04N19/59H04N19/117H04N19/124H04N19/14H04N19/17
    • To improve the data compression ratio in the data compression/decompression method utilizing the down-sampling process. Image data in a DS area division unit (130) is divided into a plenty of DS areas and DS areas which are not important are converted into contracted data of the block size by down-sampling in a down-sampling unit (131). A relocation unit (132) allocates two or more contracted data in one DS area, inserts file data into the other portion in the DS area, and removes the DS area where no contracted data is allocated, thereby reducing the entire image size. The image data thus contracted is inputted into a JPEG encoder (14) and subjected to a DCT process and a quantization process for each block. When performing restoration, decompression is performed by the JPEG decoder and the original location is restored. As for the contracted data, interpolation is performed to restore the image data.
    • 在采用下采样过程的数据压缩/解压缩方法中提高数据压缩率。 DS区域划分单元(130)中的图像数据被划分为大量的DS区域,并且不重要的DS区域在下采样单元(131)中通过下采样被转换为块大小的合同数据。 重定位单元(132)在一个DS区域中分配两个或多个收缩数据,将文件数据插入DS区域中的其他部分,并且去除没有分配数据的DS区域,从而减小整个图像大小。 如此收缩的图像数据被输入到JPEG编码器(14)中,并对每个块进行DCT处理和量化处理。 执行恢复时,JPEG解码器执行解压缩,并恢复原始位置。 对于合同数据,执行插值以恢复图像数据。
    • 3. 发明申请
    • Osteoporosis Diagnosis Support Device
    • 骨质疏松诊断支持装置
    • US20070286467A1
    • 2007-12-13
    • US11665710
    • 2005-10-18
    • Akira AsanoAkira TaguchiTakashi NakamotoKenji TanimotoZainal Agus
    • Akira AsanoAkira TaguchiTakashi NakamotoKenji TanimotoZainal Agus
    • G06K9/00
    • G06T7/0012A61B5/1075A61B5/4509A61B6/505G06T5/008G06T7/194G06T2207/10116G06T2207/30008
    • It can be enabled an accurate diagnosis of osteoporosis by a simple method utilizing panoramic radiographs without requiring special skill or experience of a technician engaged in diagnosis of osteoporosis. It comprises an object region image acquisition means for enhancing the contrast of a mandible bone on digitized panoramic radiographs and extracting a portion of a mandible including a mental foramen and a mandibular base as an object region image; a discrimination and selection means for discriminating between a background portion and the portion of a mandible from the object region image and acquiring, as a judgment region image, a portion from which the background portion is removed; a defined image acquisition means for defining forms of a cortical bone and a cancellous bone constituting the mandible of the judgment region image; a means for specifying the cortical bone portion on the image in which the form is defined; calculation means for determining the thickness of the cortical bone based on the outline constituting the mental foramen and the cortical bone specified by the respective means; and an output means for outputting the determined thickness of the cortical bone.
    • 可以通过使用全景X光片的简单方法来准确诊断骨质疏松症,而不需要从事骨质疏松症诊断的技术人员的特殊技能或经验。 它包括一个对象区域图像获取装置,用于增强数字化全景X光照片上的下颌骨的对比度,并提取包括精神孔和下颌底部的下颌骨的一部分作为对象区域图像; 鉴别和选择装置,用于从对象区域图像中区分背景部分和下颌部分,并且获取背景部分被去除的部分作为判断区域图像; 定义的图像获取装置,用于定义构成判断区域图像的下颌骨的皮质骨和松质骨的形式; 用于指定在其中定义了形式的图像上的皮质骨部分的装置; 计算装置,用于基于构成由各自手段指定的心理孔和皮质骨的轮廓来确定皮质骨的厚度; 以及用于输出所确定的皮质骨厚度的输出装置。
    • 8. 发明授权
    • Osteoporosis diagnosis aiding apparatus utilizing panoramic radiographs
    • 骨质疏松诊断辅助设备利用全景影像
    • US07602955B2
    • 2009-10-13
    • US10541595
    • 2003-12-25
    • Akira TaguchiTakashi NakamotoAkira Asano
    • Akira TaguchiTakashi NakamotoAkira Asano
    • G06K9/00
    • G06T7/0012G06T2207/10116G06T2207/20044G06T2207/30008G06T2207/30036
    • The present invention provides an osteoporosis diagnosis aiding apparatus that utilizes a panoramic radiograph. A digitalized image of the panoramic radiograph enters a personal computer (S210). The cortical bone at the lower edge of the mandibular molar in the panoramic radiograph is specified with a mouse to make that part a target of examination (S220). This extracted image is subjected to the following image processing. (1) Subject the image to median filtering so as to reduce noises throughout that image. (2) Find a skeleton constituted by micro-structural elements (S230). (3) Extract only components parallel to the tilt of the lower edge of the mandible (S240). (4) Binarize the image using Otsu's linear discrimination method, for example (S250). The binarized lines are then classified into three groups according to size, and can be determined as a risk of osteoporosis in a case where there is more than just a single line classified in the largest line group aside from the smallest line group.
    • 本发明提供一种利用全景X线片的骨质疏松症诊断辅助装置。 全景X光片的数字化图像进入个人计算机(S210)。 在全景X光片下的下颌磨牙下缘的皮质骨用鼠标指定使该部分成为检查目标(S220)。 对该提取图像进行以下图像处理。 (1)对图像进行中值滤波,以减少整个图像的噪声。 (2)找到由微观结构元素构成的骨架(S230)。 (3)仅提取与下颌骨下缘倾斜平行的部件(S240)。 (4)使用Otsu的线性判别方法对图像进行二值化,例如(S250)。 然后根据大小将二值化线分为三组,并且在除了最小线组之外的最多线组中不仅仅是分为单线的情况下,可以确定为骨质疏松症的风险。