# US 2014/0195189 A1 · Systems and methods for statistical measurement control of spectrophotometric data

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2014/0195189 A1
- Document ID: US20140195189A1
- Status: Published application
- Kind: A1
- Application number: 13/737,179
- Filed: 2013-01-09
- Published: 2014-07-10
- Earliest claimed: 2013-01-09
- Assignees: PPG Industries Ohio, Inc.
- Applicants: Ppg Industries Ohio, Inc.
- Inventors: Alison M. Norris
- Web page: https://patentgrep.com/patent/US20140195189A1

## CPC

- G01N 21/55: Specular reflectivity
- G01J 3/462: {Computing operations in or between colour spaces; Colour management systems}
- G01J 3/504: {Goniometric colour measurements, for example measurements of metallic or flake based paints}
- G01N 21/255: {Details, e.g. use of specially adapted sources, lighting or optical systems}
- G01N 21/8422: {Investigating thin films, e.g. matrix isolation method}
- G01N 21/8851: {Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges (G01N21/8806 and G01N21/93 - G01N21/95692 take precedence; optical measurement of dimensions G01B11/00; optical scanning G02B26/10; image transformation G06T3/00; computerised image enhancement G06T5/00; image processing per se for flaw detection G06T7/0002)}
- G01N 2021/8877: {Proximity analysis, local statistics}
- G01N 2201/1245: Averaging several measurements
- G01N 2201/1248: Validating from signal shape, slope, peak
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)
- G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N)

## Abstract

A computer implemented method. The method includes obtaining, using a processor, spectral reflectance data from a coated surface having a target coating theron; and determining, using the processor, whether the data includes any outlier data points. The method also includes removing, using the processor, at least one of the outlier data points to produce final spectral reflectance data; and calculating, using the processor, a characteristic of the target coating based at least in part on the final spectral reflectance data.

## Claims

### Claim 1

A computer implemented method, comprising:
obtaining, using a processor, spectral reflectance data from a coated surface having a target coating theron;
determining, using the processor, whether the data includes any outlier data points;
removing, using the processor, at least one of the outlier data points to produce final spectral reflectance data; and
calculating, using the processor, a characteristic of the target coating based at least in part on the final spectral reflectance data.

### Claim 2 (depends on 1)

The method of claim 1, wherein determining whether the data includes any outlier data points includes performing a statistical outlier test on the data.

### Claim 3 (depends on 2)

The method of claim 2, wherein the statistical outlier test is the Grubb's test for outliers.

### Claim 4 (depends on 1)

The method of claim 1, wherein calculating a characteristic of the target coating includes at least one of generating colorimetric data (L*, a*, b*, h*), generating tristimulus data (X, Y, Z), generating absorption and scattering data (K, S), calculating opacity, calculating jetness, calculating pigment strength, generating color formulations, generating a color match quality indicator, generating a color adjustment, and generating spectral reflectance curve comparisons.

### Claim 5 (depends on 1)

The method of claim 1, further comprising measuring the coated surface with a spectrophotometer to obtain the spectral reflectance data. 6. A system, comprising:
a user interface; and
a processor in communication with the user interface and programmed to:
obtain spectral reflectance data from a coated surface having a target coating theron;
determine whether the data includes any outlier data points;
remove at least one of the outlier data points to produce final spectral reflectance data; and
calculate a characteristic of the target coating based at least in part on the final spectral reflectance data.

### Claim 6 (depends on 5)

The system of claim 5, further comprising a database in communication with the processor.

### Claim 7 (depends on 5)

The system of claim 5, further comprising a display in communication with the processor.

### Claim 8 (depends on 5)

The system of claim 5, further comprising a spectrophotometer in communication with the processor.

### Claim 9 (depends on 5)

The system of claim 5, wherein the processor is programmed to determine whether the data includes any outlier data points using the Grubb's outlier test.

### Claim 10

An apparatus, comprising:
means for obtaining spectral reflectance data from a coated surface having a target coating theron;
means for determining whether the data includes any outlier data points;
means for removing at least one of the outlier data points to produce final spectral reflectance data; and
means for calculating a characteristic of the target coating based at least in part on the final spectral reflectance data.

### Claim 11 (depends on 10)

The apparatus of claim 10, wherein the means for determining whether the data includes any outlier data points includes means for performing the Grubb's test for outliers.

### Claim 12

A non-transitory computer readable medium including software for causing a processor to:
obtain spectral reflectance data from a coated surface having a target coating theron;
determine whether the data includes any outlier data points;
remove at least one of the outlier data points to produce final spectral reflectance data; and
calculate a characteristic of the target coating based at least in part on the final spectral reflectance data.

### Claim 13 (depends on 12)

The computer readable medium of claim 12, wherein the computer readable medium includes software for causing the processor to remove at least one of the outlier data points to produce final spectral reflectance data using the Grubb's test for outliers.