Device and method for the calibrated checking of a printing on an article

Abstract

The present invention relates to an apparatus for calibrated testing of a printing of an article. The apparatus includes a data providing device adapted to provide printing data for the article from product data of the article and a camera device adapted to capture an image of an article printed by a printing process and to provide it as image data. The apparatus also includes a database device adapted to provide calibration data for the camera device and a computer device adapted to perform a quality check of the printing process based on a comparison of the printing data with the image data taking into account the calibration data.

Claims

1. An apparatus for calibrated testing of a printing on an article, the apparatus comprising: a data providing device adapted to provide printing data for the article from product data of the article; camera device adapted to capture an image of an article printed by a printing process and provide it as image data; database device adapted to provide calibration data for the camera device; a computer device which is configured to carry out a quality check of the printing process based on a comparison of the printing data with the image data, taking into account the calibration data; wherein the computer device is designed to generate learning data or test information for the quality test of the printing process in a learning phase of the computer device; and wherein the computer device is designed to generate test patterns for the quality test of the printing process based on the learning data or test information for the quality test by machine learning.

2. The apparatus according to claim 1, wherein the computer device is designed to generate, as the test patterns for the quality test, search models or comparison models by machine learning based on the recorded image data or the calibration data.

3. The apparatus according to claim 2, wherein the computer device is adapted to use the search models for a position determination of the print or for a calibrated alignment of an application of the comparison models to the captured image data.

4. The apparatus according to claim 3, wherein the computer device is adapted to compare a virtual image of the article with the image of the article captured by the camera device for the quality check of the printing process as the application of the comparison models and to produce a quality grade of the printing of the article.

5. The apparatus according claim 1, wherein the data providing device is adapted to provide the printing data for the article from the product data of the article available in a neutral data format, and wherein preferably the neutral data format comprises at least one of: i) an XML format; ii) a platform-independent data format; iii) an implementation independent data format; or iv) an M2M data format.

6. A method for calibrated checking of a printing of an article, the method comprising steps comprising: providing printing data for the article from product data of the article by means of a data providing device; capturing an image of an article printed by a printing process by means of camera device, and providing image data based on the captured image by means of the camera device; providing calibration data for the camera device by means of database device; performing a quality check of the printing process based on a comparison of the printing data with the image data taking into account the calibration data by means of computer device generating learning data for the quality check of the printing process in a learning phase of the computer device or generating inspection information for the quality inspection of the printing process in a learning phase of the computer device; and wherein test patterns for the quality inspection of the printing process are generated by machine learning based on the learning data or inspection information.

7. The method according to claim 6, wherein for the quality check of the printing process, as the application of the comparison models, a virtual image of the article is compared with the image of the article taken by the camera device, and based thereon a quality grade of the printing of the article is established.

8. The method according to claim 6, wherein the printing data for the article is provided from the product data of the article available in a neutral data format, and wherein the neutral data format comprises at least one of: i) an XML format; ii) a platform-independent data format; iii) an implementation independent data format; or iii) an M2M data format.

9. The method according to claim 6, wherein further comprising generating, as the test patterns, search models or comparison models based on the recorded image data or the calibration data.

10. The method according to claim 9, wherein the search models are used for a position determination of the print, or wherein an application of the comparison models to the captured image data is performed for a calibrated alignment.

Description

BRIEF DESCRIPTION OF THE FIGURES

(1) FIG. 1: shows a schematic representation of a device for calibrated testing of printing on an article according to an embodiment of the present invention; and

(2) FIG. 2: shows a schematic representation of a flow chart of a method for calibrated testing of a printing of an article according to an embodiment of the present invention; and

(3) FIG. 3: shows a schematic representation of a data structure for calibrated testing of a printing of an article according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

(4) In the figures of the drawings, identical reference signs designate identical or functionally identical elements, parts, components or process steps, unless otherwise indicated. The term “neutral data format” as used by the present invention includes, for example, data or file formats for neutral file exchange between units, such as computers, of a computer network.

(5) The term “neutral data format” as used by the present invention can be understood, for example, as an intermediate file format for translating data between participating systems of the computer network, such as production systems or ordering systems—webshop—or internal data processing systems—backend.

(6) In other words, a neutral file is generated from original data available in other file formats. However, the target system can read and process the neutral file unlike the original data.

(7) The term “product data”, in particular product data of the article, as used by the present invention describes, for example, data which define and classify an article, in particular according to customer-specific configuration. In other words, the product data describes and identifies parameters, characteristics, and design options of the article.

(8) FIG. 1 shows a schematic representation of a device for calibrated testing of a printing of an article according to an embodiment of the present invention.

(9) The apparatus 100 includes a data providing device 10, a camera device 20, a database device 30, and a computer device 40.

(10) The data providing device 10 is adapted to provide printing data for the article from product data of the article.

(11) The camera device 20 is adapted to take an image of an article printed by a printing process and to provide it as image data. The database device 30 is adapted to provide calibration data for the camera device.

(12) The calibration data for the camera device 20 may include, for example, learning data and inspection information, and may be associated with a respective type of the camera device 20, or may be selected in dependence on an illuminance prevailing when the image is captured, or may be selected in dependence on an illuminance prevailing when the image is captured by the camera device 20.

(13) The computer device 40 is adapted to perform a quality check of the printing process based on a comparison of the printing data with the image data, taking into account the calibration data.

(14) The present method enables printing process control of freely configurable articles. The device can be coupled with computer-aided product manufacturing systems and Internet-based product configuration systems, and provide autonomous and customizable verification systems via M2M communication.

(15) FIG. 2 shows a schematic diagram of a flowchart of a method for inspecting a printing of an article according to an embodiment of the present invention.

(16) As a first method step, a providing S1 of printing data for the article is performed from product data of the article by means of a data providing device.

(17) The neutral data format may be, for example, an XML format, a platform-independent data format, an implementation-independent data format, or an M2M data format.

(18) As a second method step, an image of an article printed by a printing process is captured S2 by means of a camera device and image data is provided based on the captured image by means of the camera device.

(19) As a third method step, calibration data for the camera device is provided S3 by means of a database device.

(20) As a fourth process step, a quality check of the printing process is carried out S4 based on a comparison of the printing data with the image data, taking into account the calibration data, by means of a computer device.

(21) FIG. 3 shows a schematic representation of a data structure for calibrated checking of printing on an article in accordance with an embodiment of the present invention.

(22) The data structure format shown in FIG. 3 can comprise the product data of the article present in a neutral data format. Further, the data structure format may be adapted to be used by a method for calibrated checking of a printing of an article.

(23) Further, in the illustrated data structure format, the neutral data format may be an

(24) i) XML format; and/or

(25) ii) platform-independent data format; and/or

(26) iii) implementation-independent data format; and/or

(27) iv) M2M data format

(28) The data structure format may comprise hierarchically structured product data in a text file format.

(29) Although the present invention has been described above with reference to preferred embodiments, it is not limited thereto, but can be modified in a variety of ways. In particular, the invention can be changed or modified in a variety of ways without departing from the essence of the invention.

(30) Additionally, it should be noted that “comprising” and “comprising” do not exclude other elements or steps, and “one” or “a” do not exclude a plurality.

(31) It should further be noted that features or steps that have been described with reference to any of the above embodiments may also be used in combination with other features or steps of other embodiments described above.

(32) Reference signs in the claims are not to be regarded as a limitation.