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Binary Image Processing - Techniques and Applications, IEE Colloquium on

Date 8 Mar 1991

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Displaying Results 1 - 11 of 11
  • The binary Hough transform-theory, real time implementation and application to visual inspection

    Publication Year: 1991 , Page(s): 1/1 - 1/4
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (204 KB)  

    The binary Hough transform (BHT) as well as its implementation and applications to visual inspection have been briefly presented and discussed. It has been verified that it provides some interesting features and could be an effective option for application in visual inspection and to produce the representation of the digital images by endpoints of its straight line segments to be used for posterior higher level recognition. Its fast execution in software and hardware makes it an interesting option for real time applications. Further developments being addressed by the authors include: theoretical analysis of the BHT accuracy and effectiveness, bit-level versions of the BHT systolic architectures, a hierarchical BHT, a BHT based on trivial line segments, application of the BHT to image compression and the usage of the BHT systolic architectures for other DSP and image processing tasks (e.g. filters, convolvers) View full abstract»

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  • High performance character recognition for off-line handwritten British postcodes

    Publication Year: 1991 , Page(s): 6/1 - 6/5
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (216 KB)  

    Provides details of a dictionary search scheme which efficiently improves the overall postcode recognition rate. The research described has shown that it is possible to extract high word recognition rates from an unoptimised character recognition algorithm, by using contextual knowledge. A basic character recognition rate of 63.1% was achieved for the full alphanumeric character set, as written in a database of British postcodes. The addition of a syntactic recognition stage, based upon analysis of allowable British postcode formats, improved the character recognition rate to 73.2%. The effect of syntax was mainly to reduce the confusion between numerals and alphabetic characters. A trie-structured dictionary was used to add contextual knowledge to the postcode recognition process View full abstract»

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  • High performance classifier architectures for binary image processing

    Publication Year: 1991 , Page(s): 2/1 - 2/3
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (120 KB)  

    Adaptability and high performance are prerequisites for cost-effective automatic industrial inspection and other product handling systems. The specification of appropriate systems therefore demands the development both of high performance algorithms and efficient techniques for implementation, together with a means of matching algorithms and implementational infrastructure. Transputer arrays offer a potentially very effective infrastructure for the implementation of pattern classification algorithms, which often embody inherent parallelism in their structure. The paper investigates ways in which a number of classification algorithms, particularly those directly optimised for the processing of binary images and applicable to automatic inspection tasks, can be mapped to an array of transputers to provide a real-time environment for classification processing. It is shown how the parallel implementation of a multilevel hierarchical architecture can offer significant benefits in defining the relationship between computational complexity (and therefore attainable processing speeds) and error rate performance View full abstract»

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  • An edge detecting image sensor architecture

    Publication Year: 1991 , Page(s): 4/1 - 4/3
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (152 KB)  

    A programme of work at Brighton Polytechnic has concentrated upon the development of binary sensors featuring low to medium spatial resolution, with a view to their application to flexible industrial automation. The programme began with the in-depth study of the IS32, a member of the family of proprietary Optic DRAM (ODRAM) devices from Micron Technology. This was basically a modified 64 kbit dynamic RAM. It also offered random access to its photosites which could then be selectively sensitised. Consideration of these unique properties inspired the design of the edge detecting image sensor architecture presented View full abstract»

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  • Determining the location of components in an AMP environment

    Publication Year: 1991 , Page(s): 7/1 - 7/4
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (200 KB)  

    The manipulation of components by a robot in an automatic manufacturing process (AMP) requires knowledge about each component's location and orientation. A 3-D representation of the robot's workspace is thus required. In the work presented the 3-D representation is built up using information obtained from robot mountable CCD cameras positioned around the workspace. Each camera is connected to a transputer which is responsible for preprocessing the extracted data before its subsequent use. The process of extracting the information from the cameras is separated from the processes that use this information. This separation of information provider from information user enables the software that controls the cameras (and even the cameras themselves) to be upgraded with no corresponding changes to the information user software. The paper outlines the procedure whereby the model of the workspace is constructed and subsequently used to locate the components within it View full abstract»

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  • A low-cost robot guidance vision system

    Publication Year: 1991 , Page(s): 5/1 - 5/3
    Cited by:  Papers (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (104 KB)  

    Describes some of the technology underpinning a new generation of systems. The sensor is attached to the robot, such that it is parallel to the welding torch or other tool, via an additional rotary axis allowing independent control of the sensor viewing direction. Operating on the basis of triangulation with a laser stripe, the sensor returns a standard video signal to the sensor controller. The sensor interface and acquisition board extracts the laser stripe from the video image in real time reducing the signal from 2-D to 1-D. From this point on binary image processing is used View full abstract»

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  • A tracking vision sensor system

    Publication Year: 1991 , Page(s): 3/1 - 3/5
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (168 KB)  

    The initial aim was to develop a nontactile scanner capable of tracking a weld seam during robot welding operations. In addition, it was intended to investigate AGV guidance and surface inspection applications. The scanner is based on the `flying spot' principle as described by Batchelor et al. (1985), with a low power helium-neon laser scanned across the work-piece by means of a mirror rotated at constant speed using a stepper motor. Clearly the scan rate of the laser across the work-piece is determined by the number of sides on the mirror and the switching rate of the motor, while the scan length is a function of the distance between mirror and work-piece and the number of sides on the mirror. An eight-sided mirror has been selected as this gives the maximum scan rate with the required scan length and stand off height View full abstract»

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  • Automated identification of shoe upper components

    Publication Year: 1991 , Page(s): 10/1 - 10/5
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (176 KB)  

    The ultimate application had not been fixed when the project started, but it was considered likely the vision would be used to sort shapes from a random selection into kits for producing batches of, say, two dozen pairs of shoes. For use in control of subsequent processes such as automatic stitchmarking, the vision must determine the position of each point in a shape to within one hundredth of one inch. This requires that orientation be measured to 0.07 degrees. A research project aimed at producing instrumentation with vision capability meeting the above requirements was started with one of the authors (LNW) at City University in London in 1978, and has since been extended at BUSM's Research Department and at the Universities of Durham and Hull. The paper is concerned solely with the image identification and positioning aspects of the work View full abstract»

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  • Use of colour for image segmentation in the graphic arts

    Publication Year: 1991 , Page(s): 9/1 - 9/4
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (184 KB)  

    It has been shown that colour selective masking can be a powerful technique for constructing masks for segmenting images in graphic arts applications. Perceptual colour coordinates allow a more effective specification of regions of colour space than printing ink densities. The colour selective methods can be provided along with other conventional feature extraction methods as graphical `tools' in a user interface `toolkit', so that the operator can choose the tool or combination of tools most appropriate for the job. The binary mask can be extended to an 8-bit `soft mask' for image blending and brushing operations View full abstract»

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  • IEE Colloquium on `Binary Image Processing - Techniques and Applications' (Digest No.059)

    Publication Year: 1991
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (16 KB)  

    The following topics were dealt with: binary Hough transform and visual inspection; classifier architectures for binary image processing; tracking vision sensor system; edge detecting image sensor; robot guidance vision system; character recognition for off-line handwritten British postcodes; automatic manufacturing process components location; on-line integrated industrial inspection system for lighting industry; graphics arts colour image segmentation; and automated identification and positioning of shoe upper components View full abstract»

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  • An on-line integrated industrial inspection system for the lighting industry

    Publication Year: 1991 , Page(s): 8/1 - 8/4
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (196 KB)  

    Presents a set of knowledge-based algorithms suitable for on-line inspection, with particular reference to lamp inspection problems for the lighting industry. The system was developed to identify not only uncut wires, but also many other faults, such as missing solders on connector pads, insufficient soldering, and solder splashes on the backing disc. The paper describes the problem and identifies the types of faults to be detected by a machine vision system; and presents the methods proposed to solve this specific industrial inspection problem. A model system on which the software algorithms are tested and the performances are evaluated is also discussed View full abstract»

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