Image processing method and scanning system using the same

• US 10,163,248 B1
• Filed: 08/02/2017
• Issued: 12/25/2018
• Est. Priority Date: 08/02/2017
• Status: Active Grant

• Current Assignee: Microtek International Incorporated (Zoetis Incorporated)
• Original Assignee: Microtek International Incorporated (Zoetis Incorporated)
• Inventors: Hsu, Cheng-Hsun, Tai, Huei-Chuan
• Primary Examiner(s): Worku, Negussie
• Application Number:
  US15/667,213
• Time in Patent Office: 510 Days
• Field of Search: 375 E7226, 382166, 382239, 382240, 382113, 382232, 382237, 382251, 382276, 382302, 345582, 345 46, 358518
• CPC Class Codes: G01B 11/0608 Height gauges
• CPC Class Codes: G01B 11/24 for measuring contours or curvatures
• CPC Class Codes: G06T 15/205 Image-based rendering
• CPC Class Codes: G06T 17/10 Constructive solid geometry [CSG] using solid primitives, e.g. cylinders, cubes
• CPC Class Codes: G06T 2207/10024 Color image
• CPC Class Codes: G06T 3/073 Transforming surfaces of revolution to planar images, e.g. cylindrical surfaces to planar images
• CPC Class Codes: G06T 7/50 Depth or shape recovery
• CPC Class Codes: G06T 7/507 from shading G06T7/586 takes precedence
• CPC Class Codes: H04N 1/00135 Scanning of a photographic original

Abstract

A scanning system comprises a scanning device and a computing device. The scanning device scans an object to produce an original image, wherein the original image contains a plurality of colors. The computing device is electrically connected to the scanning device and performs an image processing method including steps: receiving the original image generated by the scanning device; specifying a number of the plurality of layers; assigning each color of the original image to one of the plurality of layers; determining a height of each layer; and mapping the height of each layer to the original image based on each color contained by each layer to produce a height image.

Claims

1. An image processing method comprising steps:

a computing device receiving an original image including a plurality of colors;

specifying a number of multiple layers;

the computing device assigning one of the plurality of colors of the original image to one of the multiple layers;

determining a height value of one of the multiple layers; and

the computing device mapping the height value of one of the multiple layers to the original image according to one of the plurality of colors assigned to one of the multiple layers to generate a height image containing a coordinate value and the height value.

2. The image processing method according to claim 1, wherein the number of the multiple layers is generated by the computing device automatically.

3. The image processing method according to claim 1, wherein the number of the multiple layers is specified by the user.

4. The image processing method according to claim 1, wherein the computing device assigns one of the plurality of colors of the original image to one of the multiple layers according to a K-means algorithm, a tone separation method, or a histogram pixel separation method.

5. The image processing method according to claim 1 further comprising a step of the computing device smoothing the multiple layers having neighboring height values.

6. The image processing method according to claim 1 further comprising a step of the computing device mapping a representative color of one of the multiple layers to the original image according to one of the plurality of colors assigned to one of the multiple layers to generate a fewer-color image, wherein the representative color is selected from the colors contained by the layer or specified by the user.

7. The image processing method according to claim 1, wherein the computing device determines the height value of one of the multiple layers according to a chrominance or brightness of a representative color of the layer, and wherein the representative color is selected from the colors contained by the layer or specified by the user.

8. The image processing method according to claim 1, wherein the height value of one of the multiple layers is specified by the user.

9. The image processing method according to claim 1 further comprising a step of the computing device generating a 3D image according to the height image.

10. A scanning system comprising:

a scanning device, scanning an object to generate an original image, wherein the original image includes a plurality of colors; and

a computing device, electrically connected with the scanning device and configured for receiving the original image generated by the scanning device;

specifying a number of multiple layers;

assigning one of the plurality of colors of the original image to one of the multiple layers;

determining a height value of one of the multiple layers; and

mapping the height value of one of the multiple layers to the original image according to one of the plurality of colors assigned to one of the multiple layers to generate a height image containing a coordinate value and the height value.

11. The scanning system according to claim 10, wherein the number of the multiple layers is generated by the computing device automatically.

12. The scanning system according to claim 10, wherein the number of the multiple layers is specified by the user.

13. The scanning system according to claim 10, wherein the computing device includes a processing unit, which assigns one of the plurality of colors of the original image to one of the multiple layers according to a K-means algorithm, a tone separation method, or a histogram pixel separation method.

14. The scanning system according to claim 10, wherein the computing device includes a processing unit, which smooths the multiple layers having neighboring height values.

15. The scanning system according to claim 10, wherein the computing device includes a processing unit, which maps a representative color of one of the multiple layers to the original image according to one of the plurality of colors assigned to one of the multiple layers to generate a fewer-color image, wherein the representative color is selected from the colors contained by the layer or specified by the user.

16. The scanning system according to claim 10, wherein the computing device includes a processing unit, which determines the height value of one of the multiple layers according to a chrominance or brightness of a representative color of the layer, and wherein the representative color is selected from the colors contained by the layer or specified by the user.

17. The scanning system according to claim 10, wherein the height value of one of the multiple layers is specified by the user.

18. The scanning system according to claim 10, wherein the computing device includes a processing unit, which generates a 3D image according to the height image.

19. The scanning system according to claim 10 further comprising a 3D printer, which is electrically connected with the computing device and generates a physical object having height differences according to the height image.