发明名称 |
Radiographic image processing apparatus and radiographic image processing program |
摘要 |
A radiographic image processing apparatus in this invention decreases a spatial resolution twice in total by a low-frequency image generating device and a low-frequency characteristic generating device. Thereby an influence such as noise and thus calculation amounts are decreased. Moreover, excessive characteristic amounts (patterns) not removed among characteristic amounts extracted through the low-frequency image generating device and a characteristic extracting device can be decreased by decrease of the spatial resolution by the low-frequency characteristic generating device. Consequently, influence such as noise and calculation amounts can be decreased for the low-frequency characteristics generated by the low-frequency characteristic generating device and a radiation area extracted by an area extracting device on the latter stage. As a result, influences such as noise can be decreased for achieving characteristic extraction and area extraction with high accuracy, and thus calculation amounts can be decreased. |
申请公布号 |
US8831325(B2) |
申请公布日期 |
2014.09.09 |
申请号 |
US200913519773 |
申请日期 |
2009.12.29 |
申请人 |
Shimadzu Corporation |
发明人 |
Ohno Yoshinori |
分类号 |
G06K9/00;G06K9/34;G06K9/40;A61B6/00;G06T7/00 |
主分类号 |
G06K9/00 |
代理机构 |
McDermott Will & Emery LLP |
代理人 |
McDermott Will & Emery LLP |
主权项 |
1. A radiographic image processing apparatus for processing a radiographic image having undergone radiography, comprising:
a low-frequency image generating device for generating a low-frequency image having a lower frequency than the radiographic image through decreasing a spatial resolution of the radiographic image; a characteristic extracting device for performing characteristic extraction through determining characteristic amounts in accordance with signal level differences between any pixel of the low-frequency image and peripheral pixels thereof and generating a characteristic image by bringing the characteristic amounts into correspondence with each pixel of the low-frequency image; a low-frequency characteristic generating device for generating a low-frequency characteristic as an image having a lower frequency than the characteristic image through decreasing a spatial resolution of the characteristic image; and an area extracting device for selecting a characteristic as an edge of a radiation area based on the low-frequency characteristic, and extracting the radiation area from the radiographic image. |
地址 |
Kyoto JP |