Recognition of colors by photo-sensitive means

Claim 1

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 photosensitive means which analyze in a number of 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 wave length in a first system of coordinates having n axes in which each of the n axes corresponds to one of said wave lengths, the response of each of said photoseNsitive means being plotted along the one of the axes of said first system which corresponds to the same wave length, said method including the following steps: determining for each of said dyes to be recognized the permissible variations in its color attributes and in its density on the sample, in said first coordinate system; determining in said first system of coordinates all the possible loci of points representative of the color attributes 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; transforming said first system of coordinates to obtain a second system having as many axes as said first system, each pair of axes of said second system defining a plane; projecting said loci on at least one of said planes selected such that the projections of the loci do not intersect each other; drawing in said one of said planes, lines which separate from each other the projections of said loci; analogically representing each of said lines by electronic circuits having circuit means for each one of said planes equal to the number of separating lines, each of said circuits means receiving inlet signals corresponding to the coordinates of a point in said one of said planes and each emitting an outlet signal at a predetermined level when said last-named point is part of the separating line, at a level above said predetermined level when said last-named point is situated on one side of said last-named separating 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; determining in said second system of coordinates the new coordinates of any representative point by transforming its coordinates in said first system as they result from the responses of said photo-sensitive means; applying as said inlet signals to each of said electronic circuit means analog signals corresponding to the new coordinates of each representative point along the new axes which define said one of said planes; and determining for each selected plane based upon the level of the outlet signals of said electronic circuit means which of said separating lines the projection of the representative point for each dye to be recognized is located between.

Claim 2

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 photosensitive means which analyze in a number of 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 wave length in a first system of coordinates having n axes in which each of the n axes corresponds to one of said wave lengths, the response of each of said photoseNsitive means being plotted along the one of the axes of said first system which corresponds to the same wave length, said method including the following steps: determining for each of said dyes to be recognized the permissible variations in its color attributes and in its density on the sample, in said first coordinate system; determining in said first system of coordinates all the possible loci of points representative of the color attributes 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; transforming said first system of coordinates to obtain a second system having as many axes as said first system, each pair of axes of said second system defining a plane; projecting said loci on at least one of said planes selected such that the projections of the loci do not intersect each other; drawing in said one of said planes, lines which separate from each other the projections of said loci; analogically representing each of said lines by electronic circuits having circuit means for each one of said planes equal to the number of separating lines, each of said circuits means receiving inlet signals corresponding to the coordinates of a point in said one of said planes and each emitting an outlet signal at a predetermined level when said last-named point is part of the separating line, at a level above said predetermined level when said last-named point is situated on one side of said last-named separating 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; determining in said second system of coordinates the new coordinates of any representative point by transforming its coordinates in said first system as they result from the responses of said photo-sensitive means; applying as said inlet signals to each of said electronic circuit means analog signals corresponding to the new coordinates of each representative point along the new axes which define said one of said planes; and determining for each selected plane based upon the level of the outlet signals of said electronic circuit means which of said separating lines the projection of the representative point for each dye to be recognized is located between.

Claim 4

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 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 wave length in a first system of coordinates having n axes in which each of the n axes corresponds to one of said wave lengths, the response of each of said photo-sensitive means being plotted along the one of the axes of said first system which corresponds to the same wave length, said method including the steps of: determining for each of said dyes to be recognized the permissible variations in its color attributes and in its density on the sample, in said first coordinates system; determining in said first system of coordinates all the possible loci of points representative of the color attributes 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; transforming said first system of coordinates to obtain a second system having n axes corresponding with the n axes of said first system; selecting in said second system of coordinates a boundary figure having (n-1) dimensions and which separate said loci into two groups respectively situated on one and the other side of said figure; analogically representing said separating figure by electronic circuit means having means for receiving inlet signals corresponding to the coordinates of a point in said second system and in response to said inlet signals emitting an outlet signal at a predetermined level when said last-named point is part of said separating figure, at a level above said predetermined level when said last-named point is situated on one side of said separating figure, and at a level below said predetermined level when said last-named point is on the other side of said separating figure; electronically determining in said second system of coordinates the new coordinates of any representative point by transforming its coordinates in said first system as they result from the responses of said photo-sensitive means; applying as said inlet signals to each of said electronic circuit means analog signals corresponding to the new coordinates of each representative point; and determining the level of the outlet signals of said electronic circuit means where with respect to said separating figure said last-named point is situated and therefore to which of said two groups of loci said last-named representative point corresponds.

Claim 5

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 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 wave length in a first system of coordinates having n axes in which each of the n axes corresponds to one of said wave lengths, the response of each of said photo-sensitive means being plotted along the one of the axes of said first system which corresponds to the same wave length, said method including the steps of: determining for each of said dyes to be recognized the permissible variations in its color attributes and in its density on the sample, in said first coordinates system; determining in said first system of coordinates all the possible loci of points representative of the color attributes 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; transforming said first system of coordinates to obtain a second system having n axes corresponding with the n axes of said first system; selecting in said second system of coordinates a boundary figure having (n-1) dimensions and which separate said loci into two groups respectively situated on one and the other side of said figure; analogically representing said separating figure by electronic circuit means having means for receiving inlet signals corresponding to the coordinates of a point in said second system and in response to said inlet signals emitting an outlet signal at a predetermined level when said last-named point is part of said separating figure, at a level above said predetermined level when said last-named point is situated on one side of said separating figure, and at a level below said predetermined level when said last-named point is on the other side of said separating figure; electronically determining in said second system of coordinates the new coordinates of any representative point by transforming its coordinates in said first system as they result from the responses of said photo-sensitive means; applying as said inlet signals to each of said electronic circuit means analog signals corresponding to the new coordinates of each representative point; and determining the level of the outlet signals of said electronic circuit means where with respect to said separating figure said last-named point is situated and therefore to which of said two groups of loci said last-named representative point corresponds.