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    • 24. 发明授权
    • Video signal processing device using look-up table
    • 使用查看表的视频信号处理设备
    • US5144434A
    • 1992-09-01
    • US550284
    • 1990-07-09
    • Shinichi YamashitaMitsugu Tanaka
    • Shinichi YamashitaMitsugu Tanaka
    • H04N9/793H04N9/825
    • H04N9/825H04N9/7936
    • A video signal processing device is arranged to supply a digital video signal to an infinite impulse response digital filter, to supply the digital video signal from the filter to a look-up table circuit which has a non-linear input-output characteristic, and to emphasize a high-frequency component of the digital video signal by adding the output signal of the look-up table circuit to the digital video signal supplied to the filter, so that a non-linearly emphasizing process can be accomplished at a high speed on the digital video signal. Further, in the video signal processing device, a look-up table circuit is arranged to look up a table by using as an address the output signal of a first subtractor which receives a high-frequency-component-emphasized digital video signal as one of its inputs and to have a non-linear input-output characteristic, the output signal of the look-up table circuit is subtracted from the high-frequency-component-emphasized digital video signal to obtain a high-frequency-component-suppressed digital video signal, the video signal thus obtained is supplied to an infinite impulse response digital filter, and the output signal of the filter is supplied to the first subtracter as its other input, so that the digital video signal can be non-linearly deemphasized at a high speed.
    • 27. 发明授权
    • Photographic developing agents, process for developing using same, and
light-sensitive materials containing same
    • 摄影显影剂,使用它的显影方法和含有它们的感光材料
    • US4108663A
    • 1978-08-22
    • US738420
    • 1976-11-03
    • Mitsugu TanakaMasaki OkazakiToshiaki AonoTakeshi Hirose
    • Mitsugu TanakaMasaki OkazakiToshiaki AonoTakeshi Hirose
    • G03C7/26C07D249/18C07D257/04C07D417/12G03C5/29G03C5/30G03C3/00G03C1/06G03C1/48
    • C07D257/04C07D249/18G03C5/3021Y10S430/158
    • A photographic developing agent represented by the formula (I): ##STR1## wherein one of X and Y is a group capable of inhibiting development on release immediately after the developing agent is oxidized at the step of development, and the other of X and Y is an --NH--SO.sub.2 --Z group (wherein Z is an alkyl group, an aryl group or a heterocyclic group); A is a hydrogen atom or a group hydrolyzable under alkaline conditions; R.sub.1, R.sub.2, and R.sub.3, which may be the same or different, each is a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an alkoxy group, an aryloxy group, an --S--Z' group (wherein Z' is an alkyl group, an aryl group or a heterocyclic group), an --NH--SO.sub.2 --Z" group (wherein Z" is an alkyl group, an aryl group or a heterocyclic group), an acylamido group, an amino group, a halogen atom, a hydroxy group, or an acyloxy group; and R.sub.1 and R.sub.2 further may combine to form a ring, a silver halide photographic light-sensitive material having a photographic layer containing at least one compound selected from the compounds represented by the above formula (I), and a process for developing images by treating a photographic light-sensitive material with a developer containing at least one compound selected from the compounds represented by the above formula (I).
    • 由式(I)表示的照相显影剂:其中X和Y中的一个是显影剂在显影步骤中立即氧化后能够抑制显影释放的基团,另一个 X和Y是-NH-SO 2 -Z基(其中Z是烷基,芳基或杂环基); A是氢原子或在碱性条件下可水解的基团; R 1,R 2和R 3可以相同或不同,分别为氢原子,烷基,芳基,杂环基,烷氧基,芳氧基,-SZ'基(其中Z' 是烷基,芳基或杂环基),-NH-SO 2 -Z“基(其中Z”是烷基,芳基或杂环基),酰氨基,氨基 卤素原子,羟基或酰氧基; R1和R2还可以组合形成环,卤化银摄影感光材料具有含有至少一种选自上述式(I)表示的化合物的化合物的照相层,以及通过处理 具有含有至少一种选自上述式(I)表示的化合物的化合物的显影剂的照相感光材料。