Image analysis – Color image processing – Pattern recognition or classification using color
Patent
1996-09-10
1998-05-12
Boudreau, Leo
Image analysis
Color image processing
Pattern recognition or classification using color
364526, G06K 900
Patent
active
057518475
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a method and apparatus for determining the colour or colour code of an object, like for example an electrical insulated wire or an electrical component and more particularly to a method and apparatus according to the preamble of claims 1 and 7, respectively, and to applications of the method according to claims 5 and 6.
U.S. Pat. No. 4,731,663 discloses a method and apparatus according to the preamble of claims 1 and 7, respectively. In this known method the objects are first placed proximate to a white background. Further the known method requires a teach-in cycle to obtain a set of reference values. Optical filters or a stripe filter are used to pass red, green and blue spectral components of the light, respectively.
U.S. Pat. No. 4,991,223 discloses a method and apparatus for recognizing image features using colour elements. Eight predetermined colour ranges are used to detect the edges of an object. The colour of the object is not determined.
U.S. Pat. No. 5,206,918 discloses a method for colour analysis wherein three primary colour measurements are transformed into saturation, hue and brightness values. In the embodiment described in this document the method is used to rate the quality of a baked product wherein the red-green information is compared with a predetermined range.
The present invention aims to provide a method and apparatus of the above-mentioned type, which can determine the colour or colour code of an object quickly and with high accuracy.
To this end the method of the invention shows the characterizing features of claim 1 and the apparatus shows the features of claim 7.
In this manner a method and apparatus are obtained by means of which the colour or colour code of an object can be determined quickly in a very reliable manner.
The invention will be further explained by reference to the drawings in which an example for the application of the method according to the invention is very schematically shown.
FIG. 1 shows a very schematical perspective view of some important components of an application of the method according to the invention in an apparatus for wiring a connector.
FIG. 2 shows very schematically a side view of the apparatus of FIG. 1.
FIG. 3 shows very schematically a top view of a part of the apparatus of FIG. 1.
FIG. 4 is a block diagram of the apparatus of FIG. 1.
FIG. 5 shows a flow diagram for explanation of the method according to the invention.
Referring to FIGS. 1-4 there is shown very schematically an apparatus for wiring a connector 1 with a plurality of contacts 2 of the IDC-type. In this apparatus the method according to the invention is used for determining the colour code of the wires which should be connected to the contacts. However, the method according to the invention is not restricted to such an application and is generally suitable for determining the colour of an object.
The apparatus comprises a holder 3 in which the connector 1 to be wired is placed, wherein a wire insertion head 4 is located at each side of the holder 3, said wire insertion head having a tool 5 movable back and forth transverse to the longitudinal direction of the holder 3. Each wire insertion head 4 further comprises a wire guiding means 6 into which a wire to be connected to a contact 2, can be brought. The wire insertion heads 4 are movable in the longitudinal direction of the holder 3 by a driving means 7 indicated in the block diagram of FIG. 4, so that the tools 5 can be aligned with each contact 2 of the connector 1 located in the holder 3.
The apparatus further comprises wire selection means which are mounted in a predetermined fixed position. The wires are generally part of a cable 8 which is clamped in a cable clamp 9 schematically shown. The wires 10 are inserted into an insertion opening 11 of a stationary located wire selection plate 12 which is part of the wire selection means. A selection slot 13 is provided in the wire selection plate 12, said slot 13 joining the insertion opening 11 at one side and at the other side debouching with an outle
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patent: 4731663 (1988-03-01), Kovalchick et al.
patent: 4797738 (1989-01-01), Kashi et al.
patent: 4991223 (1991-02-01), Bradley
patent: 5206918 (1993-04-01), Levene
patent: 5317648 (1994-05-01), Sawada et al.
Boudreau Leo
Framatome Connectors International
Tran Phuoc
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