Kabushiki Kaisha Toshiba

Nippon Steel Sumitomo Metal Corporation

Yoichi Inoue

Akira Kasano

Chihiro Uematsu

Naoki Tajima

Tatsuro Honda

Yasuhiro Mizuno

A main object of the present invention is to provide a method capable of measuring surface temperatures of a plurality of points of cast slab at a secondary cooling zone of a continuous caster with a good accuracy and at low cost. The method comprises the steps of inserting one end of a plurality of optical fibersrespectively to nozzlesand tubes, and installing each nozzle between support rolls that support the cast slab, while spraying purge air from each nozzle toward a surface of the cast slab, receiving a thermal radiation light from the cast slab at the one end of each optical fiber, gathering other ends of the optical fibersin a bundle to take images including a core image of the other end of each optical fibers by an imaging means, and calculating the surface temperature of the cast slab.

Method and apparatus for measuring surface temperature of cast slab

An apparatus for detecting from first image data mark image data corresponding to a mark and having a first length in a first direction and a second length in a second direction perpendicular to the first direction in unit of pixels. The apparatus includes a differentiating processor, an adding processor and a controller. The differentiating processor executes differential operations for the first image data in response to first and second differential operation commands from the controller to obtain second and third image data and executes the differential operations for fourth image data in response to third and fourth differential operation commands from the controller to obtain fifth and sixth image data. The adding processor adds the second and third image data shifted by 1/2 the first length in opposite directions in response to the addition command from the controller to obtain the fourth image data and adds the fifth and sixth image data shifted by 1/2 the second length in opposite directions in response to the addition command from the controller to obtain seventh image data. The controller detects a center position of the mark from the seventh image data.

Method and apparatus for detecting mark from image data

An image processing apparatus for obtaining a shading image from a plurality of two-dimensional tomogram images includes a first obtaining section for obtaining a plurality of distance gradation images from the plurality of two-dimensional tomogram images and a second obtaining section for obtaining a distance image having density data is selected from the distance gradation image density data in units of pixels in gradation. The distance image has density data representing, in gradation, distances from a pre-designated area on a pre-designated plane to an object in gradiation. The image processing apparatus further includes a third obtaining section for obtaining a normal image having as density data normal vector components of the object from the distance image, and a fourth obtaining section for obtaining the shading image having as density data luminance data obtained from the density data of the normal image and direction data representing a designated direction from when the object is viewed.

Imaging processing method and apparatus suitably used for obtaining

A first memory stores a divided three-dimensional binary image as image data j of p bits. A second memory, equal to the first memory in size, stores data k of q bits, representing the section number of a corresponding memory section of the first memory. A histogram computing circuit concatenates data j and data k and obtains a histogram for the concatenated data. A computing unit computes a marginal distribution of the three-dimensional image on the basis of the histogram. A data conversion unit converts the p bit data to a first data image. An adder unit obtains from the first image a second image representing the marginal distribution P(x,y). The computing unit computes a marginal distribution P(x) and a marginal distribution P(y) from the second image, and also computes the volume and center of gravity of the three-dimensional binary image.

Image processing device suitable for obtaining the volume and center of

An image processing apparatus includes a 3-dimensional frame memory. The frame memory is made up of a plurality of memory planes which are logically stacked in a depth direction (Z direction) and are accessed independently. The apparatus also includes a memory controller which can access a plurality of memory areas of the frame memory. These memory areas can be located in any desired position in the depth direction, and can each have a desired number of bits in the depth direction, regardless of a bit length of image buses contained in the apparatus and connected to an image processor, and the memory controller. The image processor receives data through the image buses, logically operates the data and outputs it to the image buses. When in read mode, the memory controller converts the data read out from the memory areas of the frame memory into the type of data which can be transferred through the image buses. When in write mode, the memory controller converts the data received from the image buses into data which can be written into the memory areas.

Apparatus for processing images having desired gray levels including a

First and second images as stereoscopic images of an object are obtained. The second image is shifted by a value dx. Absolute values of differences between image data of the shifted image and the first image are calculated, thus obtaining a third image. The third image is subjected to average value filtering to obtain a fourth image. A fifth image which has the same size as that of the fourth image and has a maximum gray level in an initial state is prepared. Image data having a smaller value is selected from image data of the fourth and fifth images to obtain a sixth image. Absolute values of differences between image data of the sixth and fifth images are calculated, thus obtaining a seventh image having the calculated absolute values as image data. A ninth image which has the same size as that of the seventh image. When the gray level of the pixel of the sevength image is 0, an eighth image is obtained to have the image data of the ninth image. When the gray level of the pixel of the seventh image is other than 0, the eighth image is obtained to have image data representing a gray level corresponding the value dx as the image data. After the eighth image is obtained, the sixth image is set as the fifth image, the eighth image is set as the ninth image and value dx is updated, and the eighth image is repetitively obtained. The finally obtained eighth image is determined as a parallax image representing a deviation of positions of corresponding pixels on the first and second images by gray levels. Based on the parallax image, a to an arbitrary point with respect to a reference point is determined.

Growing community of inventors

Tokyo, Japan

Yoichi Inoue