Method for controlling a decorative printing process

1. A method performed by at least one computing device for controlling a printing process for printing a decorative target image onto a substrate, comprising:

providing the decorative target image to be printed in the printing process by at least one decorative parameter data set;

simulating the printing process in a simulation step based on the decorative parameter data set, at least one printing process parameter data set and stored historical printing data sets such that a digital decorative image is generated;

verifying the generated digital decorative image based on the decorative target image to be printed and at least one verification criterion,

wherein the verifying of the generated digital decorative image comprises comparing the digital decorative image generated by the simulation step and the decorative target image, and

wherein the at least one verification criterion is a comparison criterion that specifies at least a predetermined minimum optical similarity measure between the digital decorative image generated by the simulation step and the decorative target image; and

outputting the printing process parameter data set used in the simulation step to conduct the printing process, if the verification criterion is met.

2. The method of claim 1 , wherein the printing process parameter data set comprises a substrate material parameter set and/or a printing colour parameter data set and/or a printing machine control parameter data set.

3. The method of claim 1 , wherein the method further comprises:

predetermining at least one substrate material parameter of a substrate to be used in the printing process, in particular at least one type of substrate material, wherein the simulation of the printing process in the simulation step is based on the predetermined substrate material parameter; and/or

predetermining at least one printing colour parameter to be used in the printing process, in particular at least one type of printing colour, wherein the simulation of the printing process in the simulation step is based on the predetermined printing colour parameter; and/or

predetermining at least one printing machine control parameter to be used in the printing process, in particular at least one printing machine type, wherein the simulation of the printing process in the simulation step is based on the predetermined printing machine control parameter.

4. The method of claim 1 , wherein if the verification criterion is not met, the simulation step is executed again, wherein at least one parameter of the printing process parameter data set is changed compared to the printing process parameter data set used in the previous simulation step.

5. The method of claim 1 , wherein the stored historical print data sets comprises a plurality of stored links between, respectively, a substrate parameter set, an printing colour parameter set, a printing machine control data set and a printed decorative image based on the linked data sets, wherein the printed decorative image is stored as a digital print decorative image.

6. The method of claim 5 , wherein in the simulation step, the digital decorative image is generated based on the stored plurality of links and at least the decorative target image to be printed, preferably additionally based on at least one predetermined substrate parameter and/or at least one predetermined ink parameter and/or at least one predetermined printing machine control parameter.

7. The method of claim 5 , wherein the stored plurality of links is generated during a learning process.

8. The method of claim 5 , wherein the stored plurality of links is provided in the form of a neural network.

9. The method of claim 8 , wherein the stored historical print data sets are updated based on the printing process parameter data set used in a printing step and the decorative image printed in the printing step.

10. The method of claim 1 , wherein the method further comprises:

conducting the printing process in a printing step, by a printing machine, based on the output printing process parameter data set such that a printed decorative image is generated on the substrate.

11. The method of claim 10 , wherein the method further comprises:

verifying the printed decorative image based on the decorative target image and at least one print quality criterion; and

if the print quality criterion is not fulfilled, re-executing the printing step, wherein at least one parameter of the printing process parameter data set is changed compared to the printing process parameter data set used in the previous printing step.

12. A non-transitory computer-readable medium comprising instructions which, when the instructions are executed by a processor, cause the processor to execute the method of claim 1 .

13. A decor printing system, comprising:

at least one receiving module configured to provide a decorative target image to be printed in a printing process by at least one decorative parameter data set;

at least one simulation module configured to simulate the printing process in a simulation step based on the provided decorative parameter data set, at least one printing process parameter data set and stored historical printing data sets such that a digital decorative image is generated;

at least one verification module configured to verify the created digital decorative image based on the decorative image to be printed and at least one verification criterion,

wherein the verifying of the generated digital decorative image comprises comparing the digital decorative image generated by the simulation step and the decorative target image, and

wherein the at least one verification criterion is a comparison criterion that specifies at least a predetermined minimum optical similarity measure between the digital decorative image generated by the simulation step and the decorative target image; and

at least one output module configured to output the printing process parameter data set used in the simulation step if the verification criterion is met.