Abstract: In a color signal matrix adjustment method, a single first color signal matrix related value is adjusted (VAC) to obtain a color signal matrix adjustment, and at least two color signal matrix parameters other than the single first color signal matrix related value are automatically adapted (AAC) in dependence upon the color signal matrix parameter adjustment.

Abstract: In a method of histogram equalization of an image signal (Y), a histogram of the image signal (Y) is determined (HC), the image signal (Y) is processed (HP) in dependence upon the histogram to obtain a modified signal (Ymod), and the modified signal (Ymod) is enhanced (E) where said modified signal (Ymod) falls below said image signal (Y). Preferably, the enhancement (E) is color saturation (RGBsat) dependent.

Abstract: In a method of interpolating an output color signal (Go) of a given color in dependence on an input signal (RGBin) having first values of the given color which are influenced by a first other color and second values of the given color which are influenced by a second other color, an intermediate color signal (Gc′) is interpolated (1) at positions where no signal of the given color is present, an average value (avG) of the given color is generated (3) in dependence upon both the first and second values, and the output color signal (Go) is furnished (5) in dependence upon both the intermediate color signal (Gc′) and the average value (avG).

Abstract: In a method of interpolating a color sample in a signal (RGBin) having alternately colored samples, the missing color sample is interpolated in dependence upon neighboring color samples (G1, G2, G3, G4) of the same color (G) as the color sample to be interpolated, and a differently colored sample (R/B) from the same location as the color sample to be interpolated.

Abstract: In a method of generating output color signals (Ro, Go, Bo) and determining a contour signal (cont) from a sensor signal (RGBin) obtained by a sensor having a color filter with alternately colored filter elements, the sensor signal (RGBin) is delayed (1H) over at least one row period; for each color, zero values are inserted at locations corresponding to the locations of differently colored filter elements; a plurality of mutually at least one row-delayed color signals (nxG, nxR, nxB) with inserted zeros is furnished; the plurality of mutually at least one row-delayed color signals (nxG, nxR, nxB) with inserted zeros is filtered (FR, FG, FB) to obtain the output color signals (Ro, Go, Bo), and the plurality of mutually at least one row-delayed color signals (nxG, nxR, nxB) with inserted zeros is filtered (Fcont) to obtain the contour signal (cont).

Abstract: In a method of enhancing a quality of a video signal (Yin), an absolute value (ST) of a first derivative of the video signal (Yin) is obtained (51-59), and the video signal (Yin) is processed (53-57, 61-69) in dependence upon the absolute value (ST) of the derivative of the video signal (Yin).

Abstract: In a picture signal enhancement circuit having a circuit (3) for measuring a histogram and a non-linear processing circuit (1), coupled to the measuring circuit (3), for enhancing the picture signal in dependence upon the measured histogram, the histogram is measured only at transitions in the picture signal.

Abstract: A non-linear circuit having a transfer characteristic which is adjustable per amplitude segment of an input signal (Yi) includes a segmenting circuit (11 . . . 15, 21 . . . 25) for obtaining a plurality of amplitude segment signals (Y1 . . . Y5) from the input signal (Yi), and a non-linear segment amplifier circuit (31 . . . 35) coupled to the segmenting circuit (11 . . . 15, 21 . . . 25) for separately multiplying segments (Y1 . . . Y5) of the input signal (Yi) by respective segment gain factors (HM1 . . . HM5) in dependence upon a common gain factor (HMa) derived from the segment gain factors (HM1 . . . HM5) and on the basis of the amplitude segment signals (Y1 . . . Y5) for supplying a signal (Y"s) which is adjustable per amplitude segment of the input signal (Yi). The non-linear circuit may also include an output circuit (37, 39) coupled to the non-linear segment amplifier circuit (31 . . .

Abstract: Color picture display device and/or color camera including a controllable gamma arrangement C, C' in which a controlled color correction circuit operating in synchronism with the control of the gamma arrangement is provided. This color correction circuit is preferably constituted by a controlled amplifier device A, A' for controlling the chrominance signals applied to the color picture display device or supplied by the color camera.

Abstract: A camera for recording television, photographic or cinematographic images includes an automatic focus-setting device. Information for this device is obtained with the aid of two optical paths having different path lengths present in an optical lens system placed in front of an opto-electronic sensor in the form of a charge transfer device comprising a pick-up member, a storage member and a shift register member. After a signal comparison of signals obtained during focus information recording periods the focus is set until an optimum signal correlation is the result.

Abstract: An image sensor (PSR) in the form of a charge transfer device comprises picture pick-up elements (p) for converting incident radiation into electric charge and a charge transfer shift register (SR) for periodically shifting the charges under the control of clock pulses (S1) to a sensor output terminal (TSR) for the supply of a pulsatory picture signal with periodically occurring reset pulses and picture signal pulses. The output terminal (TSR) is succeeded by a series arrangement (SC) of at least a signal clamping circuit (CL) for the reset pulses, a resettable signal smoothing and hold circuit (SS) for the picture signal pulses and a signal sampling circuit (SH) for the picture signal pulses. By virtue of the signal smoothing it is achieved that interferences have a minimum influence on the picture signal sample values. The signal smoothing and hold circuit (SS) is in the form of, for example, a peak voltage detector or of a current source integrator for the picture signal pulses.

Abstract: To realize a camera with both an undisturbed scene recording and automatic adjustments which are periodically effected while using one and the same image sensor (1), this sensor is formed as a charge transfer device comprising a pick-up member (I), a storage member (S) and a shift register member (SR). To perform a black level setting (9, 11) in the scene picture signal an opaque strip (BS) is provided on the pick-up member (I).

Abstract: A camera for recording television, photographic or cinematographic images comprises an automatic focusing device. The information required for automatic focusing is obtained with the aid of a partial blocking arrangement for blocking two different portions of an optical path leading to an electronic image sensor. These two portions are located on opposite sides of an optical central axis. After signals obtained during the partial blocking periods have been compared with each other, the focusing is adjusted until signal correlation is optimized.To produce a camera having both undisturbed scene recording and automatic focusing, while using only one sensor, this camera includes a charge transfer device. The device comprises a pickup member, a storage member, and a shift register member.