EP0113462A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Solid state color imaging apparatus
Assignee: Panasonic Holdings Corp
•
Filing: 1983-12-14
•
Granted: —
•
Expires: 2003-12-14
Abstract
Abstract In a solid state color imaging apparatus wherein plural horizontal line signals are read out within one horizontal scanning time, by utilizing vertical correlation of signals, undesirable effect of horizontal resolution power in luminance signal and also undesirable noises in the luminance signal and chrominance signal, induced at a horizontal boundary between different color regions are removed, thereby enabling to provide high quality image having high resolution and small noise.
Inventors
- 👤 Yasumi Miyakawa
- 👤 Tatsuki Ide
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 13:39
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/80; H04N23/84; H04N25/00; H04N25/10; H04N25/11; H04N25/13; H04N25/135; H04N25/136
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
256 words
A solid state color imaging apparatus comprising: a solid state imaging sensor comprising a plurality of photoelectric elements regularly disposed in two- dimensional patterns, the disposition comprising a plurality of horizontal lines, each having a plurality of photoelectric elements in repetition at a predetermined horizontal pitch, wherein dispositions of the photoelectric elements in vertically neighboring horizontal lines are horizontally shifted by half of said predetermined horizontal pitch, a color filter disposed substantially in front of said solid state imaging sensor and comprising a plurality of color filter elements equivalently having three spectral characteristics and disposed in a predetermined order of repetition in horizontal direction, in a manner to have repetition spatial period of 1½ times of said predetermined horizontal pitch, said solid state image sensor having such circuit connection that the photoelectric elements (2a, 2c-- or 2b, 2d--) for receiving light of the same color are connected to the same vertically disposed signal lines (3a, 3b--), and signals of a predetermined number of plural vertically neighboring horizontal lines (a and b or c and d) of the photoelectric elements are simultaneously read out, circuit means (28+29, 32+33+34+35) to produce at least plural luminance signals or plural chrominance signals from said plural simultaneously read out signals for one horizontal line, correlation detection circuit means (30+31, 36+31) for detecting vertical correlation among said plural :luminance signals or said plural chrominance signals, suppressing circuit means (27) for suppressing transmission of at least said luminance signals or chrominance signals to an encoder (20) responding to insufficiency of said vertical correlation.
Claim 2
Dependent Claim
256 words
A solid state color imaging apparatus comprising: a solid state imaging sensor comprising a plurality of photoelectric elements regularly disposed in two- dimensional patterns, the disposition comprising a plurality of horizontal lines, each having a plurality of photoelectric elements in repetition at a predetermined horizontal pitch, wherein dispositions of the photoelectric elements in vertically neighboring horizontal lines are horizontally shifted by half of said predetermined horizontal pitch, a color filter disposed substantially in front of said solid state imaging sensor and comprising a plurality of color filter elements equivalently having three spectral characteristics and disposed in a predetermined order of repetition in horizontal direction, in a manner to have repetition spatial period of 1½ times of said predetermined horizontal pitch, said solid state image sensor having such circuit connection that the photoelectric elements (2a, 2c-- or 2b, 2d--) for receiving light of the same color are connected to the same vertically disposed signal lines (3a, 3b--), and signals of a predetermined number of plural vertically neighboring horizontal lines (a and b or c and d) of the photoelectric elements are simultaneously read out, circuit means (28+29, 32+33+34+35) to produce at least plural luminance signals or plural chrominance signals from said plural simultaneously read out signals for one horizontal line, correlation detection circuit means (30+31, 36+31) for detecting vertical correlation among said plural :luminance signals or said plural chrominance signals, suppressing circuit means (27) for suppressing transmission of at least said luminance signals or chrominance signals to an encoder (20) responding to insufficiency of said vertical correlation.
Claim 3
Dependent Claim
50 words
A solid state color imaging apparatus in accordance with claim 1, wherein said correlation detection circuit means (30+31, 36+31) detects vertical-correlation among said plural luminance signals or said plural chrominance signals by at least comparing plural low frequency components or plural color difference signals of output signals of plural lines.
Claim 4
Dependent Claim
26 words
A solid state color imaging apparatus in accordance with claim 1 or 2, wherein said suppressing circuit means controls compensation signal level.of horizontal aperture compensation circuit.
Claim 5
Dependent Claim
52 words
A solid state color imaging apparatus in accordance with one of claims 1 to 3, which further comprises horizontal correlation detecting circuit means, for detecting horizontal correlation among said plural luminance signals and disabling means for disabling operation of said suppressing circuit means when detected horizontal correlation is below a predetermined level.
Claim 6
Dependent Claim
56 words
A solid state color imaging apparatus in accordance with one of claims 1 to 4, which further comprises detecting means for detecting amplitude of chrominance signal, and control means for controlling horizontal aperture compensation signal level in said suppressing circuit means when amplitude of chrominance signal detected by said detecting means is above a predetermined level.
Claim 7
Dependent Claim
56 words
A solid state color imaging apparatus in accordance with one of claims 1 to 5, which further comprises detecting means for detecting amplitude of luminance signal and control means for controlling horizontal aperture compensation signal level in said suppressing circuit means when amplitude of luminance signal detected by said detecting means is above a predetermined level.
Claim 8
Dependent Claim
66 words
A solid state color imaging apparatus in accordance with one of claims 1 to 6, wherein said correlation detection circuit means comprises comparison means for comparing low frequency components of signals of plural horizontal lines of photoelectric elements, to produce vertical correlation signal, and the apparatus further comprising polarity inversing means for periodically inversing polarity of said vertical correlation signal for addition to said luminance signal.
Claim 9
Dependent Claim
68 words
A solid state color imaging apparatus in accordance with one of claims 1 to 7, wherein said correlation detection circuit means has a circuit to produce difference of said plural chrominance signals within time period of two horizontal scanning, to produce vertical correlation, and said suppressing circuit means suppresses transmission of chrominance signals to said encoder, for suppressing interference signal generated in said luminance signal or chrominance signal.
Claim 10
Dependent Claim
49 words
- A solid state color imaging apparatus in accordance with claim 8, which further comprises horizontal correlation detecting circuit means for detecting horizontal correlation among said plural luminance signal, and disabling means for stopping said suppressing of said interference signal when said horizontal correlation is below a predetermined level.
Claim 11
Dependent Claim
52 words
A solid state color imaging apparatus in accordance with claim 8, which further comprises detecting means for detecting amplitude of chrominance signal, and control means for controlling horizontal aperture compensation signal level in said suppressing circuit means when amplitude of chrominance signal detected by said detecting means is above a predetermined level.
Claim 12
Dependent Claim
57 words
A solid state color imaging apparatus in accordance with claim 8, which further comprises detecting means for detecting amplitude of luminance signal and horizontal aperture compensation signal and control means for controlling horizontal aperture compensation signal level in said suppressing circuit means when amplitude of luminance signal detected by said detecting means is above a predetermined level.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.