Automatic recognition of colors

Claim 2

In a method for the automatic recognition of the coloring dyes used in a sample such as a drawing for the preparation of the perforated cards or bands for loom Jacquards, by means of photo-sensitive means which analyze in a number of primary colors or wave lengths the light reflected by each of the dyes to be recognized when the corresponding portion of the sample is illuminated by a light beam of predetermined characteristics, recognition of each dye from which the light is reflected being based on the position of the point which represents the responses of the photo-sensitive means corresponding to each of said primary colors in a system of coordinates in which each axis corresponds to one of said primary colors, the response of each of said photo-sensitive means being plotted along the one of said axes which corresponds to the same primary color, the improvement which consists in determining for each of said dyes to be recognized the permissible variations in its color attribrites and in its density on the sample in said coordinate system; in determining in said system of coordinates the locus of all the possible points representative of the color attribrites and density of each of said dyes to be recognized, taking into account said permissible variations, to thus obtain a number of loci equal to the number of said dyes; in drawing in said system of coordinates at least one geometrical figure which separates from each other the loci of the dyes to be recognized, said figures having a dimension less than said loci; in analogically representing each of said figures by an electronic circuit so as to obtain a number of circuits equal to the number of said separating figures, each of said circuits, when receiving inlet signals corresponding to the color of a dye expressed by the coordinates of a point in said system, emitting an outlet signal at a predetermined level when said last-named point is part of the separating figure represented by said last-named circuit, at a level above said predetermined level when said last-named point is situated on one side of said last-named figure, and at a level below said predetermined level when said last-named point is on the other side of said last-named separating Figure; in applying as inlet signals to each of said circuits the responses of said photo-sensitive means; and in determining from the levels of the outlet signals of said electronic circuits the location of the representative point of the dye to be recognized with respect to the location of said figures.

Claim 3

In a method as claimed in claim 1: said primary colors being two in number; said system of coordinates being two-dimensional; each of said loci being a surface delimited by a closed curve; and some at least of said separating figures being formed of a straight line.

Claim 4

In a method as claimed in claim 1: said primary colors being two in number; said system of coordinates being two-dimensional; each of said loci being a surface delimited by a closed curve; and some at least of said separating figures being formed of a succession of segments of different straight lines.

Claim 5

In a method as claimed in claim 1: said primary colors being three in number; said system of coordinates being three-dimensional; each of said loci being a volume delimited by a surface closed on itself; and some at least of said separating figures being formed of a plane.

Claim 6

In a method as claimed in claim 1: said primary colors being three in number; said system of coordinates being three-dimensional; each of said loci being a volume delimited by a surface closed on itself; and some at least of said separating figures being formed of a succession of portions of different planes.

Claim 7

In a method for the automatic recognition of the coloring dyes used in a sample such as a drawing for the preparation of the perforated cards or bands for loom Jacquards, by means of photo-sensitive means which analyze in more than two primary colors or wAve lengths the light reflected by each of the dyes to be recognized when the corresponding portion of the sample is illuminated by a light beam of predetermined characteristics, recognition of each dye from which the light if reflected being based on the responses of the photo-sensitive means corresponding to each of said primary colors, the improvement which consists: in determining the representative point which corresponds to the responses of said photo-sensitive means for each pair of said primary colors in a two-dimensional system of coordinates in which each axis corresponds to one of the primary colors of said each pair, by plotting the response of each of said last-named photo-sensitive means along the one of said axes which corresponds to the same primary color for each dye, so as to obtain a number of two dimensional systems equal to the possible number of pairs of said primary colors with each of said dyes to be recognized being represented in each of said systems; in determining for each of said dyes to be recognized the permissible variations in its color attribrites and in its density on the sample; in determining in each of said two-dimensional systems of coordinates the curve which forms the locus of all the possible representative points of each of said dyes to be recognized, taking into account the permissible variations of same; in drawing in each of said two-dimensional systems of coordinates lines which separate from each other the loci of said dyes to be recognized; in analogically representing each of said lines by an electronic circuit means for obtaining in each of said two-dimensional systems a number of circuits equal to the number of separating lines, each of said circuits, when receiving inlet signals corresponding to the coordinates of a point in said last-named system, emitting an outlet signal at a predetermined level when said last-named point is part of the separating line represented by said last-named circuit, at a level above said predetermined level when said last-named point is situated on one side of said last-named line, and at a level below said predetermined level when said last-named point is on the other side of said last-named separating line; in applying as inlet signals to each of said circuits the responses of said photo-sensitive means in the two primary colors corresponding to the one of said two-dimensional systems which includes the one of said separating lines to which said last-named circuit corresponds; and in determining from the level of the outlet signals of said electronic circuits between each of said separating lines the representative point of each dye to be recognized is situated in some at least of said two-dimensional systems of coordinates.

Claim 8

In a method for the automatic recognition of the coloring dyes used in a sample such as a drawing for the preparation of the perforated cards or bands for loom Jacquards, by means of photo-sensitive means which analyze in more than two primary colors or wAve lengths the light reflected by each of the dyes to be recognized when the corresponding portion of the sample is illuminated by a light beam of predetermined characteristics, recognition of each dye from which the light if reflected being based on the responses of the photo-sensitive means corresponding to each of said primary colors, the improvement which consists: in determining the representative point which corresponds to the responses of said photo-sensitive means for each pair of said primary colors in a two-dimensional system of coordinates in which each axis corresponds to one of the primary colors of said each pair, by plotting the response of each of said last-named photo-sensitive means along the one of said axes which corresponds to the same primary color for each dye, so as to obtain a number of two dimensional systems equal to the possible number of pairs of said primary colors with each of said dyes to be recognized being represented in each of said systems; in determining for each of said dyes to be recognized the permissible variations in its color attribrites and in its density on the sample; in determining in each of said two-dimensional systems of coordinates the curve which forms the locus of all the possible representative points of each of said dyes to be recognized, taking into account the permissible variations of same; in drawing in each of said two-dimensional systems of coordinates lines which separate from each other the loci of said dyes to be recognized; in analogically representing each of said lines by an electronic circuit means for obtaining in each of said two-dimensional systems a number of circuits equal to the number of separating lines, each of said circuits, when receiving inlet signals corresponding to the coordinates of a point in said last-named system, emitting an outlet signal at a predetermined level when said last-named point is part of the separating line represented by said last-named circuit, at a level above said predetermined level when said last-named point is situated on one side of said last-named line, and at a level below said predetermined level when said last-named point is on the other side of said last-named separating line; in applying as inlet signals to each of said circuits the responses of said photo-sensitive means in the two primary colors corresponding to the one of said two-dimensional systems which includes the one of said separating lines to which said last-named circuit corresponds; and in determining from the level of the outlet signals of said electronic circuits between each of said separating lines the representative point of each dye to be recognized is situated in some at least of said two-dimensional systems of coordinates.

Claim 9

In a method as claimed in claim 6, some at least of said separating lines being straight lines.

Claim 10

In a method as claimed in claim 6, some at least of said lines being formed of a succession of segments of different straight lines.