发明公开
EP1662316A2 A method and an apparatus for detecting the base concentration of a photographic film
审中-公开
一种检测照相胶片的碱浓度的方法和装置
- 专利标题： A method and an apparatus for detecting the base concentration of a photographic film
- 专利标题（中）： 一种检测照相胶片的碱浓度的方法和装置
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申请号： EP05111124.3申请日： 2005-11-23
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公开(公告)号： EP1662316A2公开(公告)日： 2006-05-31
- 发明人: Toshihiro, Shunsaku , Kita, Koji
- 申请人： NORITSU KOKI CO., LTD.
- 申请人地址： 579-1, Umehara Wakayama City Wakayama, 640-8550 JP
- 专利权人： NORITSU KOKI CO., LTD.
- 当前专利权人： NORITSU KOKI CO., LTD.
- 当前专利权人地址： 579-1, Umehara Wakayama City Wakayama, 640-8550 JP
- 代理机构： Betten & Resch
- 优先权： JP2004338729 20041124
- 主分类号： G03B27/80
- IPC分类号： G03B27/80
摘要：
A method of detecting the base concentration of a film is provided comprising the steps of generating a concentration histogram from the film image in each of the RGB color components read out with an image pick up device, shifting and stretching the histograms in the other colors towards the histogram in the reference color in the concentration axial direction, calculating an superimposed area between the two histograms in the two color components after the stretching process, and finding the shift rate and the stretch ratio when a total of the respective superimposed areas calculated is the greatest value. As the minimum of the lowest concentration in the histograms at the shift rate and the stretch ratio determined is specified to represent the location of the base concentration in the original histogram, the base concentration in each color component of the film can be calculated from the location of the base concentration in the histogram.
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