Fuji Photo Film Company, Limited

Fujifilm Corporation

Yasuo Aotsuka

Masakazu Yoneyama

Mitsutoshi Tanaka

Yoshinobu Katagiri

Seiji Ishizuka

Kenichi Fukumura

Masashi Ishiyama

Takanori Hioki

Shuichi Ohtsuka

Soichiro Yamamoto

Kiyohiko Yamamuro

Koji Takahashi

Tadashi Ikeda

Masaki Okazaki

Toshiaki Aono

Haruo Takei

Masahiro Konishi

Yuji Mihara

Hiroshi Fujimoto

Hideki Naito

Takeshi Shibata

Masatoshi Kato

Eiichi Saito

Kazuma Takeno

Hirozo Ueda

A solid-state imaging apparatus comprises: a solid-state imaging device having pixels that image light originating from a subject, by dividing the light into color signals; and a signal processor that subjects photographed image data output from the device to white balance correction at a gain corresponding to light source type(s). The device further comprises a sensor that detects light in a wavelength range which induces a difference having a predetermined value or more between radiant energy of a first light source and that of a second light source on the surface of the device. The processor comprises: a mixing ratio estimation unit that determines a mixing ratio between illumination light originating from the first light source and that originating from the second one, through use of a detection signal output from the sensor; and a gain computation unit that computes a gain where the white balance correction is to be effected, according to the mixing ratio.

Solid-state imaging apparatus and digital camera for white balance correction

A color solid-state imaging device used in combination with an interference-type infrared cut filter, the element comprises a coloring material which is contained in or formed on any of layers provided within an incident light path in the color solid-state imaging device, wherein the coloring material absorbs an incident light within a wavelength range in which a cut wavelength of the interference-type infrared cut filter shifts toward shorter wavelengths when the incident light obliquely enters the interference-type infrared cut filter.

Color solid-state imaging device, solid-state imaging apparatus using the color solid-state imaging device, and digital camera

In a solid-state image pick-up device provided with a pixel for distinguishing a light source type in a predetermined region of the solid-state image pick-up device, a filter for transmitting a light having at least a wavelength of 505 nm to 530 nm is provided as a filter for distinguishing a light source type to be mounted on the pixel for distinguishing a light source type. It is more suitable that the filter for distinguishing a light source type should also transmit a light having a wavelength of 640 nm or more. Consequently, a sunlight and a fluorescent lamp can be distinguished from each other. In addition, it is also possible to easily distinguish an ordinary type white fluorescent lamp from the daylight color, day white color and bulb color of a 3-wavelength type fluorescent lamp.

Solid-state image pick-up device and image pick-up apparatus capable of distinguishing a photographing light source type

In a solid-state imaging apparatus provided with a solid-state imaging element having a plurality of pixels for subdividing incident light from a photographic subject into a plurality of color signals so as to image the photographic subject; and signal processing means for performing a white balance correcting operation based upon a gain amount corresponding to a sort of a light source with respect to photographed image data outputted from the solid-state image element; two sorts (G, G) of pixels whose spectral sensitivities are different from each other are provided on the solid-state imaging element as the pixel for detecting at least one color among the plurality of color signals; the signal processing means is comprised of: a mixing ratio predicting meansoperated in such a manner that when there are plural sorts of light sources as to the incident light, a mixing ratio of illumination light emitted from the plural sorts of light sources is predicted every pixel from photographed image data acquired by the pixels having two sorts of the spectral sensitivities; and a gain amount calculating meansfor calculating a gain amount used to perform the white balance correcting operation every pixel in response to the mixing ratio.

Solid-state imaging apparatus and digital camera

A chromaticity diagram is divided into a plurality of sections by a primary color line and a complementary color line of a color that does not cause hue turn, then it is decided to which section a color signal being output from an imaging device belongs, and then a color correcting operation is performed for the color signal every section. Accordingly, it is not needed to detect the flesh color itself when the hue turn of the flesh color is corrected by the color correcting operation. Any flesh color can be decided easily according to whether or not the color signal being output from the imaging device has entered into the section including the flesh color. Therefore, the appropriate color correcting operation can be applied to the flesh color.

Color image signal processing method for correcting hue turn and color image outputting device and imaging device

A color picture signal processing method includes the steps of: (a) inputting picture signal data; (b) converting the picture signal data to data of luminance Y and color differences Cr and Cb on a Y-Cr-Cb space; and (c) executing a color difference matrix calculation by using at least one pair of equations. By the invention, it may be is possible to obtain a color picture signal wherein a hue circle of a flesh color is suppressed.

Color picture signal processing method and color picture using the method

There are photographing scenes which are difficult, for a conventional image pickup apparatus having a solid state image pickup device with primary color filters, to correctly judge whether an illumination light source is the sun or a fluorescent lamp. The solid image pickup device of an image pickup apparatus uses two types of red or green pixels having different spectral sensitivities. The type of a light source can be judged by using signals from the two types of the pixels.

Solid state image pickup device capable of distinguishing between light sources and image pickup apparatus using such solid state image pickup device

An image pickup system includes photodiodes with color filters. A first color filter group includes visual light color filters, and a second color filter group includes a long red color filter at 640 nm or longer or a color filter at 580 nm and one of the visual light color filters. An infrared cut filter covers all the filters. A control circuit includes a fluorescent lamp distinguishing circuit for distinguishing a fluorescent lamp from other illuminating light sources by a ratio of an output signal from the photodiode with the long red filter to an output signal from the photodiodes with the visual light color filters; and a white balance control circuit for adjusting a white balance so as to match the illuminating light source distinguished by the fluorescent lamp distinguishing circuit.

Color image pickup apparatus with light source distinguishing function

A cell electrode of a stripe rectangle shape having at least one electrode depolarizing mix layer on a current collector. A thickness of one end portion of the electrode depolarizing mix layer is thicker than an average thickness of the electrode depolarizing mix layer by 2 to 25%.

Cell electrode with thick tip portion

A method of making a cell electrode of a stripe rectangle shape having at least one electrode depolarizing mix layer on a current collector. A thickness of one end portion of the electrode depolarizing mix layer is thicker than an average thickness of the electrode depolarizing mix layer by 2 to 25%. The method comprises sequentially bond adhesive tape pieces to a strip conductive sheet, coating on electrode depolarizing mix solution on the surface of the stripe conductive sheet and peeling off the adhesive tape piece.

Method of making cell electrode with thick tip portion

A cell electrode of a stripe rectangle shape having at least one electrode depolarizing mix layer on a current collector. The thickness of two end portions of the electrode depolarizing mix layer are thicker than an average thickness of the electrode depolarizing mix layer by 2 to 25%.

Cell electrode with thick tip portions

A nonaqueous secondary battery comprising positive and negative sheet electrodes, each composed of a collector coated with an electrode material mixture containing the respective active material and a nonaqueous electrolyte containing a lithium salt, wherein the electrode material mixture is present on both the inner and the outer sides of the collector and the coating thickness of the electrode material mixture on the inner side of the collector of the positive and/or negative electrode(s) is smaller than that of the electrode material mixture on the outer side of said collector. The battery is excellent in charge and discharge cycle characteristics, and the sheet electrodes have excellent winding properties when rolled up into cylinders.

Nonaqueous secondary battery

In a heat-developable color photosensitive material comprising a photosensitive silver halide, a dye providing compound, and a binder on a support, the content of calcium is controlled to 500 ppm or more based on the total weight of the binder, allowing the use of inexpensive binders. The photosensitive material is cost effective and forms an image with a low fog density (Dmin) and a high image density (Dmax).

Heat-developable color photosensitive material containing calcium in an

A process for forming an image comprising heating a heat-developable light-sensitive material comprising a support having thereon at least a light-sensitive silver halide and a high molecular weight compound containing a repeating unit derived from a vinyl monomer having at least one of a group -COOM and a group -SO.sub.3 M wherein M represents a hydrogen atom or an alkali metal atom, simultaneously with or after imagewise exposure thereof in the presence of water and at least one of a base and a base precursor.

Process for forming an image

A color image is formed by imagewise exposing a photosensitive material comprising at least (a) a photosensitive silver halide, (b) a binder, (c) a dye-providing substance which forms or releases a diffusible dye in response or counter-response to the reduction of the silver halide into silver at elevated temperatures, and (d) a specific-surface-active agent on a support, and heat developing the photosensitive material to form an image.

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Miyagi, Japan

Yasuo Aotsuka