System for determining amount of glue application
A system for determining an amount of glue applied to a shoe portion includes a lighting device, an image capturing device and a processor. The lighting device illuminates the shoe portion with light beams that have wavelengths within a predetermined range. The image capturing device captures an image associated with the shoe portion under illumination of the light beams, and outputs the image associated with the shoe portion. The processor obtains chromaticity values of pixels selected from an instance of the image associated with the shoe portion that is applied with glue, and generates a result of estimation regarding the amount of the glue applied to the shoe portion based on the chromaticity values and at least one reference value.
1. A system for determining an amount of glue applied to a shoe portion, said system comprising:
a lighting device configured to illuminate the shoe portion with light beams that have wavelengths within a predetermined range;
an image capturing device configured to capture an image associated with the shoe portion under illumination of the light beams, and to output the image associated with the shoe portion; and
a processor configured to obtain chromaticity values M 1 to M m of m number of pixels selected from an instance of the image associated with the shoe portion that is applied with the glue, and to generate a result of estimation regarding the amount of the glue applied to the shoe portion based on the chromaticity values M 1 to M m , where m is an integer not less than one;
wherein for the instance of the image associated with the shoe portion that is fully applied with the glue, said processor is further configured to obtain chromaticity values N 1 to N m of m number of pixels selected from a reference image which is another instance of the image associated with the shoe portion that is not applied with the glue, the m number of pixels which are selected from the reference image respectively corresponding to the pixels which are selected from the instance of the image associated with the shoe portion that is applied with the glue, said processor generating the result of estimation regarding the amount of the glue applied to the shoe portion further based on the chromaticity values N 1 to N m ;
wherein for the instance of the image which is associated with the shoe portion that is partially applied with the glue, and which has a glue image part corresponding to a part of shoe portion applied with the glue, and a shoe image part corresponding to a part of the shoe portion not applied with the glue, the chromaticity values M 1 to M m are selected from the glue image part of the instance of the image associated with the shoe portion that is partially applied with the glue, and said processor is further configured to obtain a chromaticity value N k of at least one pixel selected from the shoe image part of the instance of the image associated with the shoe portion that is partially applied with the glue, said processor generating the result of estimation regarding the amount of the glue applied to the shoe portion further based on the chromaticity value N k .
2. The system as claimed in claim 1 , wherein for each of pixels of the image associated with the shoe portion, the chromaticity value of the pixel is encoded using eight or more bits.
3. The system as claimed in claim 1 , wherein said processor is further configured to
calculate m number of deviation values R i =M i −N i where i is an integer ranging from 1 to m, and
for one of the m number of deviation values R i , generate the result of estimation which indicates that the amount of the glue is normal when it is determined by said processor that a condition that the deviation value falls in a range from V 0 −A to V 0 +A is satisfied, and generate the result of estimation which indicates that the amount of the glue is abnormal when it is determined by said processor that the condition is not satisfied, where V 0 represents a predetermined base value, and A represents a predetermined tolerance value.
4. The system as claimed in claim 3 , wherein said processor is further configured to
for one of the m number of deviation values R i , generate the result of estimation which indicates that the amount of the glue is deficient when it is determined by said processor that the deviation value is smaller than V 0 −A, and generate the result of estimation which indicates that the amount of the glue is excessive when it is determined by said processor that the deviation value is greater than V 0 +A.
5. The system as claimed in claim 3 , wherein the predetermined base value is
V
0
=
∑
i
=
1
m
V
i
-
N
i
m
,
where V 1 to V m each represent a respective one of m number of predetermined standard values which are chromaticity values of m number of pixels selected from a standard image which is further another instance of the image associated with the shoe portion that is applied with a standard amount of the glue.
6. The system as claimed in claim 3 , wherein said processor is configured to
calculate m number of difference values J i =R i −V 0 where i is an integer ranging from 1 to m; and
for one of the m number of difference values J i , generate the result of estimation which indicates that the amount of the glue is normal when it is determined by said processor that the difference value falls in another range from −A to +A, generate the result of estimation which indicates that the amount of the glue is deficient when it is determined by said processor that the difference value is smaller than −A, and generate the result of estimation which indicates that the amount of the glue is excessive when it is determined by said processor that the difference value is greater than A.
7. The system as claimed in claim 1 , wherein said processor is configured to obtain the chromaticity values M 1 to M m of m number of pixels along a predetermined direction of the image associated with the shoe portion.