发明名称 |
METHOD FOR DETERMINING DESIRED IMAGE SIGNAL RANGES, AND METHOD FOR DETERMINING DESIRED IMAGE REGIONS |
摘要 |
A method for determining a desired image signal range comprises the steps of carrying out differentiation processing on image signal components of an image signal corresponding to positions located along each of a plurality of lines on a recording medium having a radiation image recorded thereon, which lines include lines extending across an image part corresponding to a radiation blocking material. Absolute values are found from the values resulting from the differentiation processing on the image signal components, which absolute values exceed a threshold value. The image signal components are extracted which correspond to the points on the recording medium associated with the absolute values exceeding the threshold value. A probability density function of the extracted image signal components is generated, and a specific signal value is found which is determined by a signal value corresponding to the maximum value of the probability density function. The signal range on the higher image density side than the specific signal value is determined as a desired image signal range. |
申请公布号 |
EP0360231(A3) |
申请公布日期 |
1991.10.30 |
申请号 |
EP19890117322 |
申请日期 |
1989.09.19 |
申请人 |
FUJI PHOTO FILM CO., LTD. |
发明人 |
FUNAHASHI, TAKESHI C/O FUJI PHOTO FILM CO., LTD. |
分类号 |
G06T5/40 |
主分类号 |
G06T5/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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