US 7,068,314 B1Granted

Image pickup apparatus which can eliminate a false color in the spatial frequency band during chromatic signal processing

AssigneeSony Corporation

InventorsTakayuki Nakajima, Hideo Takechi

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Abstract

A system according to the present invention reads image pickup signals for all lines from a CCD image sensor and inputs these signals to a delay circuit 20. The system retrieves signals [H0D] to [H5D] for six contiguous lines and sends these signals to a vertical spatial phase synchronization filter 37 via a horizontal spatial phase synchronization filter 36. These filters 36 and 37 synchronize horizontal and vertical spatial phases. The system performs the following operations on the basis of Cy (cyan), Ye (yellow), G (green), and Mg (magenta) in each pixel data for the signal whose horizontal and vertical phases are synchronized. S1r=Cy+G, S2r=Ye+Mg S1b=Cy+Mg, S2b=Ye+G These operations create new signals S1r, S2r, S1b, and S2b which are then sent to a C process circuit 60.

Claims10

Dependent claims

An image pickup apparatus comprising:

an image pickup element having a color coding filter;
a preprocessing circuit comprising (i) means for generating signals based on output from each line in the image pickup element and for outputting the same;
(ii) spatial phase synchronization means for synchronizing horizontal and vertical spatial phases based on the output from each line in the image pickup element;
and (iii) synthesis means for generating a synthesized signal based on a signal whose horizontal and vertical spatial phases are synchronized in the spatial phase synchronization means;
a brightness processing circuit which receives the outputted signals from the means for generating signals and performs brightness processing thereon;
and
a chromatic processing circuit which receives the synthesized signal from the synthesis means and performs color processing thereon,
wherein said outputted signals are delay signals sent to said preprocessing circuit containing a plurality of adders which compiles a sum of said delay signals and a ½ multiplier which halves the sum compiled from said plurality of adders,
wherein said preprocessing circuit outputs said sum halved by said ½ multiplier to said brightness processing circuit, and
wherein said preprocessing circuit sends said delay signals as the synthesized signal from the synthesis means to said chromatic processing circuit.

7 more elements

An image pickup method for an image pickup apparatus provided with an image pickup element having a color coding filter, wherein the image pickup method comprises:

the step of generating output signals by use of a generating means based on output from each line in the image pickup element and outputting the same;
the step of allowing spatial phase synchronization means to synchronize horizontal and vertical spatial phases based on the output from each line in the image pickup element;
the step of allowing synthesis means to create a synthesized signal based on a signal whose horizontal and vertical spatial phases are synchronized in the spatial phase synchronization means;
the step of performing brightness processing on the outputted signals obtained from the means for generating signals;
and
the step of performing chromaticness processing for a signal from the synthesis means,
wherein said outputted signals are delay signals sent to a preprocessing circuit containing a plurality of adders which compiles a sum of said delay signals and a ½ multiplier which halves the sum compiled from said plurality of adders,
wherein said preprocessing circuit outputs said sum halved by said ½ multiplier to said step of performing brightness processing, and
wherein said preprocessing circuit sends said delay signals as the signal from the synthesis means to said step of performing chromaticness processing.

6 more elements

Dependencies are inferred from the claim text.