Apparatus for reducing a level difference between image signals
AssigneeCanon Kabushiki Kaisha
InventorsMasao Suzuki, Tsutomu Takayama, Masashi Hori
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Abstract
An object of this invention is to reduce level differences and errors in a luminance signal and color difference signals. In order to achieve the above object, an image pickup apparatus has an image sensor for photoelectrically converting an object image and a plurality of delay lines for delaying a video signal by one horizontal period, so that a video signal derived from an output including a clock leakage component from the image sensor is input to the plurality of delay lines, including an adjustment unit for adjusting the signal level of the video signal at an input or output of at least one of the plurality of delay lines.
Claims17
An image pickup apparatus having image pickup means for photoelectrically converting an object image into a first image signal and a second image signal, first delay means for delaying the first image signal, and second delay means for delaying the second image signal, wherein the first image signal and the second image signal respectively include a clock leakage component caused by clock pulses for driving said first delay means and said second delay means characterized by:
- level adjusting means for adjusting a level of the first image signal, whereby a level difference between output signals from said first delay means and said second delay means caused by said clock pulses for driving said first delay means and said second delay means is reduced relative to an unadjusted level thereof.
An image pickup apparatus having image pickup means for photoelectrically converting an object image into a video signal and a plurality of delay means each for delaying the video signal by a predetermined period, wherein the video signal includes a clock leakage component, characterized by:
- correcting means for correcting the video signal, after it is delayed by said delay means, by a clock signal having the same period and the same phase as those of the clock leakage component included in the video signal.
An image signal processing apparatus comprising:
- first delay means for delaying a first image signal;
- second delay means for delaying a second image signal;
- detecting means for detecting a level difference between output signals of said first delay means and said second delay means, caused by clock pulses for driving said first delay means and said second delay means;
- and
- level adjusting means for adjusting a level of the first image signal, so that the level difference between output signals of said first delay means and said second delay means caused by said clock pulses for driving said first delay means and said second delay means is reduced relative to an unadjusted level thereof.
Dependencies are inferred from the claim text.