摘要:
A compressed image producing system is disclosed which comprises a buffer memory unit including a plurality of cascade-connected shift register stages to which image signals time-sequentially produced by the conversion of the respective picture elements of an image into the corresponding binary signals through the scanning of the image are successively applied, a partial image extracting unit including a plurality of registers which take in the image signals from the shift register stages respectively and parallely delivers the image signals bit by bit, and a sampling pulse generating circuit which generates sampling pulses at predetermined intervals. The respective shift registers of the buffer memory perform their data shift operations in response to the sampling pulses to intermittently take in the image signals so that sampling point data corresponding to the scanning lines in number are stored in each register and a plurality of compressed images constructed by different groups of the sampling points are continuously produced through the shifting of the image extracting position.
摘要:
This invention provides a method and apparatus for automatically producing a standard pattern for local pattern matching. According to the present invention, local patterns equivalent in size to a standard pattern to be obtained are successively removed from the image of an object being examined to prepare standard pattern candidates. Evaluation values representing appropriateness as a standard pattern are obtained from the local patterns successively removed or the local patterns together with the image of the object being examined. The evaluation values are used in an evaluation function expressing the uniqueness of the standard pattern and in an auxiliary evaluation function as an aid to the former. The standard pattern is selected using such evaluation values.
摘要:
A group control system comprises multi-combinations of image pick-up devices and an automatic assembly apparatus controlled by information from the image pick-up devices. A computer responds to demands from the image pick-up devices and the automatic assembly apparatus which independently operate with the computer. A plurality of visual information processing apparatus are provided between the interface of the computer and the image pick-up devices, for processing information therefrom, and a pulse generator is coupled to the image pick-up devices and the visual information processing apparatus, for controlling the operations thereof. The image pick-up devices are grouped into a plurality of groups each of which is coupled to each visual information processing apparatus. The plurality of visual information processing apparatuses are timed by different timing pulses from the pulse generator, whereby processing of the information from a great number of the image pick-up devices is efficiently performed by the computer.
摘要:
A pattern position detecting system comprising first means to sequentially fetch local images in a two-dimensionally arrayed form from a video signal in accordance with the scanning of an image and at sampling intervals which are variably instructed independently in the vertical and horizontal directions, second means to hold two-dimensional patterns having the same array as the local images, third means to evaluate the degree of non-coincidence between the image of the first means and the pattern of the second means, fourth means to store the position of an image scanning point at the time when the degree of non-coincidence becomes the minimum in a predetermined range within a picture frame, fifth means to calculate the position of an object from the position obtained by the fourth means, and sixth means to store the vertical and horizontal sampling intervals necessary for the operation of the first means, the two-dimensional patterns for use in the second means and numerical values necessary for the positional calculation of the fifth means, and to select required ones and send them to the first, second and fifth means.
摘要:
A variable thresholding circuit for converting an analog signal to a binary signal comprises a comparator to which signals to be converted are applied and a threshold circuit coupled with the comparator in order to provide the threshold level of the comparator, so that the signals applied to the comparator are converted into binary signals in accordance with the threshold level. The threshold level corresponding to the output of the threshold circuit is compensated in accordance with the variations of the levels of the signals applied to the comparator. The threshold level of the comparator is changed to a compensated level when the result calculated from the threshold level and the signals applied to the comparator is smaller than a predetermined value, whereas the threshold level of the comparator is not changed to the compensated one when the result calculated from the threshold level and the signals applied to the comparator is larger than that and the compensation is repeated until the calculated result becomes smaller than the predetermined value.
摘要:
An apparatus for detecting the position of an object. The apparatus has an optical device for magnifying or enlarging a plurality of portions on the object, a photoelectric converter adapted for converting the enlarged portion image into electric signals, a plurality of thresholding circuits adapted for changing analogue signals from the respective photoelectric converter into binary signals with a threshold value determined by a signal level given by a first signal holding circuit, a circuit for calculating the threshold value from the analogue signals, a circuit for detecting the approximate position of a specific pattern in the enlarged portion images through a coarse sampling of the binary signals. A circuit for detecting the exact position of the specific pattern through measuring the area of a specific brightness in a plurality of regions in the enlarged portion images, by a fine sampling of the binary signals, and a controller for controlling the operations of respective circuits.
摘要:
A half tone display apparatus using a display apparatus of bilevel representation in white and black is provided. The apparatus includes a unit supplied with a multilevel image such as a color image, a device for detecting edges in characters, patterns and photographic images, a unit for deriving a level difference between pixels adjacent to the edge, and a control unit for forcibly displaying a pixel of the edge portion as a white or black pixel for emphasis provided that the level difference is not larger than a predetermined threshold and for applying dither conversion to other pixels.
摘要:
A feature extraction system comprises first and second memory circuits and a control circuit for controlling a storing period of time when signals are stored in the first memory circuit. The first and the second memory circuits comprise capacitor memory circuits, the time constant of the second memory circuit being larger than that of the first memory circuit. First and second comparators are coupled to the first and the second memory circuit, respectively. Signals supplied to the first memory circuit are compared with the contents thereof by the first comparator, so that the maximum signal thereof within a predetermined period of time controlled by the control circuit is stored in the first memory circuit. After the predetermined period of time, the contents of the first memory circuit are supplied to the second memory circuit and then the first memory circuit operates to store the maximum signal of the signals supplied to the first memory circuit within a next predetermined period of time. Signals from the first memory circuit are compared with the contents thereof by the second comparator in order to extract the maximum signal of the signals from the first memory circuit, which is stored in the second memory circuit, whereby the maximum signal in the signals supplied to the first memory circuit can be accurately extracted.
摘要:
A digital wide camera is capable of forming, in real time, a wide view still image from a dynamic sequence of images generated during a recording operation by panning the camera to capture a scene. The camera shoots each frame of the sequence with a certain angular field of view at 30 frames per second, for example. The wide view still image has an apparent field of angular view that is greater than that of the image of each frame. The images of the sequence are connected together by determining a shift in position between adjacent images and then overwriting each image to a wide view image buffer after shifting the image by the shift amount. Determining the shift amounts and overwriting the image buffer is accomplished in less time than the interval between shooting consecutive images so that the display of the wide view image can be updated in real time for a user's observation. The amount of shift in position is determined using global pattern matching between adjacent images by taking the projections of the intensity values of the pixels in the horizontal and vertical directions of the images being compared. The projections are subjected to collation processing to identify the amounts in shift in each direction.
摘要:
A recognition device for recognizing the shape and the position of an object includes means for applying a bundle of parallel light beams having a specific cross-section to a space containing the object, means for transducing the light informations from the space into image signals, means for extracting from said image signals a specific pattern corresponding to the portion to which the bundle of light beams is applied and means for determining the position of the pattern on the image surface, whereby the existence, shape and the position of the object are recognized from the information on the image surface.