Image processing apparatus, and image processing method

1. An image processing apparatus comprising:

a first acquisition unit configured to acquire image data including reflection characteristics information in association with each pixel, the reflection characteristic information indicating a plurality of values of reflection intensity or reflectance in a plurality of directions, the plurality of values of reflection intensity or reflectance being obtained by receiving reflected light of a material while changing at least one of a light incident angle and a light receiving angle;

a first calculation unit configured to calculate, for part of the plurality of directions, a statistical amount of reflection intensity or reflectance indicated by the reflection characteristic information corresponding to each pixel included in an area of a predetermined size; and

a generation unit configured to generate arrangement data representing an arrangement of a structure including a printing material on a recording medium, based on the statistical amount in each of the part of the plurality of directions,

wherein the structure is a three-dimensional object formed by stacking the printing material.

2. The image processing apparatus according to claim 1 , further comprising a setting unit configured to set a statistical method for the first calculation unit to calculate the statistical amount, based on the reflection characteristics information,

wherein the first calculation unit is configured to calculate the statistical amount in each of the part of the plurality of directions, using the statistical method set by the setting unit.

3. The image processing apparatus according to claim 1 , further comprising:

a reception unit configured to receive an instruction from a user; and

a setting unit configured to set a statistical method for the first calculation unit to calculate the statistical amount, based on the instruction received from the user,

wherein the first calculation unit is configured to calculate the statistical amount in each of the part of the plurality of directions, using the statistical method set by the setting unit.

4. The image processing apparatus according to claim 1 , wherein the statistical amount is an average value of the reflection intensity or reflectance indicated by the reflection characteristics information.

5. The image processing apparatus according to claim 1 , wherein the statistical amount is a standard deviation of the reflection intensity or reflectance indicated by the reflection characteristics information.

6. The image processing apparatus according to claim 1 , further comprising a second acquisition unit configured to acquire information on the structure,

wherein the generation unit is configured to generate the arrangement data further based on the information on the structure.

7. The image processing apparatus according to claim 1 , further comprising a second calculation unit configured to calculate an evaluation value representing a difference between the reflection characteristics of the material indicated by the statistical amount and the reflection characteristics represented by the structure,

wherein the generation unit is configured to generate the arrangement data based on the evaluation value.

8. The image processing apparatus according to claim 7 , wherein the generation unit is configured to generate the arrangement data so as to minimize the evaluation value.

9. The image processing apparatus according to claim 1 ,

wherein the material is velvet cloth, and

wherein the statistical amount is an average value of the plurality of values of reflection intensity or reflectance in each of the part of the plurality of directions, the plurality of values of reflection intensity or reflectance being obtained by receiving the reflected light while fixing the light incident angle and an azimuth angle of the light receiving angle and changing an elevation angle of the light receiving angle.

10. The image processing apparatus according to claim 1 ,

wherein the material is satin cloth, and

wherein the statistical amount is an average value of the plurality of values of reflection intensity or reflectance in each of the part of the plurality of directions obtained by receiving the reflected light while fixing the light incident angle and an azimuth angle of the light receiving angle and changing an elevation angle of the light receiving angle, and an average value of the plurality of values of reflection intensity or reflectance in each of the part of the plurality of directions obtained by receiving the reflected light while fixing the light incident angle and the elevation angle of the light receiving angle and changing the azimuth angle of the light receiving angle.

11. The image processing apparatus according to claim 1 ,

wherein the material is a metal, and

wherein the statistical amount is an average value and a standard deviation of the plurality of values of reflection intensity or reflectance in each of the part of the plurality of directions obtained by receiving the reflected light while fixing the light incident angle and an azimuth angle of the light receiving angle and changing an elevation angle of the light receiving angle.

12. The image processing apparatus according to claim 1 , further comprising a forming unit configured to form the image indicated by the image data by forming the structure on the recording medium based on the arrangement data.

13. The image processing apparatus according to claim 12 ,

wherein the first acquisition unit is configured to acquire image data including the reflection characteristics information, and color information indicating the color of the image,

further comprising a determination unit configured to determine a recording amount of a printing material used for forming the structure based on color information,

wherein the forming unit is configured to form the image further based on the recording amount of the printing material determined by the determination unit.

14. The image processing apparatus according to claim 13 , wherein the printing material includes a color material and an ultraviolet printing material that is curable.

15. The image processing apparatus according to claim 1 , wherein the first acquisition unit is configured to acquire the image data from a storage unit configured to store the image data in advance, the image data being obtained by measuring the reflection characteristics of the material.

16. The image processing apparatus according to claim 1 , wherein the first calculation unit calculates the statistical amount of reflection intensity or reflectance corresponding to each of a plurality of elevation angles of the light receiving angle at part of azimuth angles of the light receiving angle.

17. The image processing apparatus according to claim 1 , wherein the first calculation unit calculates the statistical amount of reflection intensity or reflectance corresponding to each of a plurality of azimuth angles of the light receiving angle at part of elevation angles of the light receiving angle.

18. An image processing apparatus comprising:

an acquisition unit configured to acquire reflection characteristics data including reflection characteristics information indicating a plurality of values of reflection intensity or reflectance in a plurality of directions, the plurality of values of reflection intensity or reflectance being obtained by receiving reflected light of a material while changing at least one of a light incident angle and a light receiving angle;

an extraction unit configured to extract reflection intensity or reflectance in part of the plurality of directions from the plurality of values of reflection intensity or reflectance in the plurality of directions, based on the reflection characteristics data; and

a generation unit configured to generate arrangement data representing an arrangement of a structure including a printing material on a recording medium, based on the reflection intensity or reflectance in the part of the plurality of directions extracted by the extraction unit,

wherein the structure is a three-dimensional object formed by stacking the printing material.

19. An image processing method for an image processing apparatus, the method comprising:

acquiring image data including reflection characteristics information in association with each pixel, the reflection characteristic information indicating a plurality of values of reflection intensity or reflectance in a plurality of directions, the plurality of values of reflection intensity or reflectance being obtained by receiving reflected light of a material while changing at least one of a light incident angle and a light receiving angle;

calculating, for part of the plurality of directions, a statistical amount of reflection intensity or reflectance indicated by the reflection characteristic information corresponding to each pixel included in an area of a predetermined size; and

generating arrangement data representing an arrangement of a structure including a printing material on a recording medium, based on the statistical amount in each of the part of the plurality of directions,

wherein the structure is a three-dimensional object formed by stacking the printing material.

20. A non-transitory computer-readable storage medium storing instructions that, when executed by a computer, cause the computer to perform a method comprising:

acquiring image data including reflection characteristics information in association with each pixel, the reflection characteristic information indicating a plurality of values of reflection intensity or reflectance in a plurality of directions, the plurality of values of reflection intensity or reflectance being obtained by receiving reflected light of a material while changing at least one of a light incident angle and a light receiving angle;

calculating for part of the plurality of directions, a statistical amount of reflection intensity or reflectance indicated by the reflection characteristic information corresponding to each pixel included in an area of a predetermined size; and

generating arrangement data representing an arrangement of a structure including a printing material on a recording medium, based on the statistical amount in each of the part of the plurality of directions,

wherein the structure is a three-dimensional object formed by stacking the printing material.