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    • 2. 发明授权
    • Digital process sensitivity correction
    • 数字过程灵敏度校正
    • US5667944A
    • 1997-09-16
    • US636076
    • 1996-04-22
    • Richard Carroll ReemJames Edward Sutton
    • Richard Carroll ReemJames Edward Sutton
    • G03B27/80G03B17/24G03B27/73H04N1/407H04N1/46H04N1/60G03C7/18
    • G03B27/735G03B17/24G03B2206/004G03B2217/243
    • A method for producing photographic images from a photographic film strip, of the type that uses density values of the photographic film strip to determine the density values of the produced photographic images, the improvement comprising the steps of:a) forming at least two reference patches of differing exposure conditions onto an otherwise unexposed portion of the photographic film strip prior to photographic processing, each reference patch falling within the total scale of the photographic film strip;b) photographically processing the photographic film strip to form densities corresponding to the photographic images and said reference patches;c) scanning said processed photographic film strip to form density representative digital signals for the photographic images and said reference patches;d) obtaining standard film density values representative of the photographic film strip;e) calculating gamma correction values from said density representative digital signals corresponding to said reference patches and said standard film density values;f) utilizing said calculated gamma correction values and said density representative digital signals corresponding to the photographic images to form corrected density representative digital signals; andg) utilizing said corrected density representative digital signals to produce photographic images from the images recorded on the photographic film strip.
    • 一种用于从照相胶片条制造照相图像的方法,该方法使用照相胶片条的密度值来确定所生产的照相图像的浓度值,改进包括以下步骤:a)形成至少两个参照片 在照相处理之前,曝光条件不同于照相胶片条的未曝光部分,每个参考贴片落在摄影胶片条的总尺度内; b)照相处理照相胶片条以形成与照相图像和所述参考片相对应的浓度; c)扫描所述经处理的照相胶片条以形成用于照相图像和所述参考片的密度代表性的数字信号; d)获得代表照相胶片条的标准膜密度值; e)从对应于所述参考斑块的所述密度代表性数字信号和所述标准膜密度值计算伽马校正值; f)利用所述计算的伽马校正值和对应于摄影图像的所述密度代表性数字信号来形成经校正的密度代表性数字信号; 以及g)利用所述校正密度代表性数字信号从记录在摄影胶片条上的图像产生照相图像。