Eastman-Kodak Company

Rca Inc.

Abb Power Td & Company

Michael C Moorman

Kenneth Alan Parulski

Robert H Hibbard

John F Monahan

A method for measuring an unknown voltage (V.sub.IN) using a voltage divider network in such a way that uncertainties in the values of the resistances do not affect the measurement. The unknown voltage is divided into three fractional voltages, the fractional voltages are measured, and the unknown voltage is computed on the basis of the fractional voltages. The unknown voltage is divided with a voltage divider comprising first, second and third resistors, and a first voltage (V.sub.o1) is measured across the first resistor, a second voltage (V.sub.o2) is measured across the second resistor and a third voltage (V.sub.o3) is measured across the third resistor. The unknown voltage V.sub.IN is computed in accordance with the equations disclosed in the specification.

Method and apparatus for measuring an unknown voltage, and power meter

A sensor 11 for a video camera includes a color filter array 12 of color filter elements covering a like array 14 of image sensing elements. Two fields of a video frame are provided by interlaced transfer of image signals from the sensor 11. The color filter array 12 is configured in relation to the sensor array 14 such that at least 75% of the image sensing elements are luminance-sensing (e.g., green) elements and the rest are chrominance-sensing (e.g., red and blue) elements. Furthermore, the chrominance-sensing elements of the same type (red or blue) are separated in a horizontal direction by at least three luminance-sensing (green) elements. The horizontal sampling frequency of the chrominance-sensing elements is increased by arranging horizontal lines containing the chrominance-sensing elements of the same type in staggered line pairs with the chrominance-sensing elements of one line appearing in different columns of the sensor in relation to chrominance sensing elements of the other line.

Solid state color image sensor using a field-staggered color filter

The invention is an exposure metering system particularly adapted for use with an electronic camera. The exposure meter is responsive to the electrical signals formed by the image capturing electronics of the camera. Using these electrical signals, a pseudocolored image is formed and displayed based on the exposure of individual image sub-areas. A full tonal original image may thus be modified to provide an image having zones each with one selectable tonal value. Each zone thus formed represents a range of tones appearing in the original image.

Exposure information feedback in electronic and/or hybrid

Electronic Imaging Apparatus is partitioned into separable modular units including an image pickup unit (4a) attachable to an image recording unit (2). The pickup unit (4a) is selected from a plurality of pickup units (4a, 4b), each producing image signals from an image sensor (6, 70, 71) uniquely devoted to the acquisition of a particular type of image (e.g., high resolution vs. low resolution, color vs. monochrome, NTSC motion vs. motion). By providing an identifying signal in connection with the pickup unit, the characteristics of the sensor (6) are specified to the recording unit. More specifically, the recording unit includes a buffer (36) for storing the image signals, a processor (40) for controlling the operation of the recording unit, including the buffer, and interface circuitry (10, 32) for responding to the identifying signal and enabling operation of the processor (40) according to the characteristics of the attached image pickup unit (4a).

Electronic imaging apparatus with interchangeable pickup units

Charge transfer devices typically include a periodically reset floating element output stage coupled to an FET amplifier for sensing the transferred charges. For reducing both low-frequency l/f noise and high-frequency reset noise, the duty factor of the device clocking signals and the reset signal are picked so that at a selected multiple of the clock signal repetition rate, the information component is in phase quadrature with the reset noise component. The charge transfer device output signal is then synchronously detected with a reference signal which is in phase with the selected multiple of the information component.

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Rochester, NY, United States of America

Michael C Moorman