Abstract: An image pickup apparatus of the kind using an object illuminating device is provided with a colorimetric circuit which is arranged to measure the hue of ambient light existing around an object to be photographed other than the illumination light of the illuminating device. The light source of the illuminating device is provided with a hue adjustment circuit. The apparatus is thus arranged to adjust the hue of the illumination light generated by the illuminating device to the hue of the ambient light.

Abstract: An improved color correction apparatus for improved color printing in a subtractive color printing system is disclosed. The disclosed apparatus utilizes an optimized three-dimensional look up table of pigment density values addressed by primary color values. The look up table is created by printing a plurality of pigment bars in response to known input density signals to a laser beam for each of three color pigments used in the system. Each of these sets of bars is subsequently scanned by the input scanner to determine the spectral content of the resultant bars and thus create a plurality of color pigment values corresponding to the spectral content of each bar for each color which is a complementary color of one of the pigments. These characteristics are used to calculate the spectral content of an actual printed image generated in response to an image generated by an input triplet to the system.

Abstract: A low-noise televison system having means for suppressing increased noise without reduction of improved picture quality. In the television broadcast transmitter, a television video signal is separated into luminance and chrominance signals and the luminance signal is further separated into high and low frequency components. The high frequency component is pre-emphasized in a specific emphasis characteristic relating to the amplitude of the low frequency component and the pre-emphasized high frequency component is then combined with the low frequency component and further matrixed with the chrominance signal to recover the video signal to be transmitted. In the television receiver, the received video signal is separated into luminance and chrominance signals and the luminance signal is further separated into high and low frequency components in similar fashion to the transmitter.

Abstract: An input device inputs waveform number data containing number assigned to a special-effect waveform to be selectively generated. A memory unit is connected to the input device in order to store the waveform number data as input by the input device into the memory unit. A memory selector supplies memory select data to the memory unit for reading out the waveform number data from the memory unit. A waveform code converter converts the waveform number data, as read out from the memory unit, into waveform codes, which correspond to the special-effect waveform to be selectively generated. A special-effect waveform generator generates a special-effect waveform signal in response to the waveform code applied from the waveform code converter. The generated special-effect waveform signal corresponds to the waveform code applied.