Imaging adjusting method capable of varying scaling ratios and related camera and image processing system

• US 9,715,737 B2
• Filed: 12/30/2015
• Issued: 07/25/2017
• Est. Priority Date: 01/12/2015
• Status: Active Grant

• Current Assignee: Vivotek, Inc.
• Original Assignee: Vivotek, Inc.
• Inventors: Chen, Chih-Chiang, Wu, Jen-Chih
• Primary Examiner(s): PARK, SOO JIN
• Application Number:
  US14/985,362
• Publication Number:
  US 20160203584A1
• Time in Patent Office: 573 Days
• Field of Search: None
• CPC Class Codes: G06T 3/04 Context-preserving transformations, e.g. by using an importance map panospheric to cylindrical image transformations G06T3/12
• CPC Class Codes: G06T 7/11 Region-based segmentation

Abstract

An image adjusting method capable of varying scaling ratios according to different regions of an image includes setting a first ROI (region of interest) circle on the image, acquiring a center of the first ROI circle to be a first reference point for setting at least one first bridging region circle, and utilizing a first scaling ratio, a second scaling ratio and a third scaling ratio to respectively adjust pixels of the first ROI circle, pixels between the first bridging region circle and the first ROI circle, and pixels out of the first bridging region circle. Dimension of the first bridging region circle is greater than dimension of the first ROI circle, and the first scaling ratio and the third scaling ratio are greater than the second scaling ratio. Further, the foresaid image adjusting method is applied to a camera and a related image processing system with image adjusting function.

Claims

1. An image adjusting method capable of varying scaling ratios according to different regions of an image, the image adjusting method comprising:

setting a first ROI (region of interest) circle on the image;

acquiring a center of the first ROI circle to be a first reference point;

setting at least one first bridging region circle by the first reference point, wherein a dimension of the first bridging region circle is greater than a dimension of the first ROI circle;

utilizing a first scaling ratio, a second scaling ratio and a third scaling ratio to respectively adjust pixels inside the first ROI circle, pixels between the first bridging region circle and the first ROI circle, and pixels between the first bridging region circle and a boundary of the image, so as to vary resolution of the whole image;

setting a second ROI (region of interest) circle on the image;

acquiring a center of the second ROI circle to be a second reference point,

setting at least one second bridging region circle by the second reference point, wherein a dimension of the second bridging region circle is greater than a dimension of the second ROI circle;

utilizing a fourth scaling ratio, a fifth scaling ratio and the third scaling ratio to respectively adjust pixels inside the second ROI circle, pixels between the second bridging region circle and the second ROI circle, and pixels out of the second bridging region circle;

determining whether to combine the first ROI circle with the second ROI circle; and

combining the first ROI circle with the second ROI circle while a determination of combining the first ROI circle with the second ROI circle is confirmed.

2. The image adjusting method of claim 1, further comprising:

setting the first ROI circle over a specific object within the image.

3. The image adjusting method of claim 1, wherein the first scaling ratio and the third scaling ratio are greater than the second scaling ratio, and the first scaling ratio, the second scaling ratio and the third scaling ratio are constant or varied according to a distance of a pixel relative to the first reference point.

4. The image adjusting method of claim 1, wherein a plurality of first bridging region circles is set on the image, dimensions of the plurality of first bridging region circles are different from each other, a scaling ratio applied to pixels between each first bridging region circle and another adjacent smaller first bridging region circle is different from a scaling ratio applied to pixels between the each first bridging region circle and another adjacent larger first bridging region circle.

5. The image adjusting method of claim 1, wherein a step of determining whether to combine the first ROI circle with the second ROI circle comprises:

determining a combination of the first ROI circle and the second ROI circle is indispensable while the adjusted first bridging region circle and the adjusted second bridging region circle are overlapped along a transverse direction or a vertical direction.

6. The image adjusting method of claim 1, wherein a step of determining whether to combine the first ROI circle with the second ROI circle comprises:

acquiring a first dimensional parameter and a second dimensional parameter of a large one of the adjusted first bridging region circle and the adjusted second bridging region circle respectively along a transverse direction and a vertical direction;

acquiring a first boundary interval along the transverse direction and a second boundary interval along the vertical direction between the adjusted first bridging region circle and the adjusted second bridging region circle;

calculating a first ratio value of the first dimensional parameter to the first boundary interval and a second ratio value of the second dimensional parameter to the second boundary interval; and

determining to combine the first ROI circle with the second ROI circle while the first ratio value and the second ratio value are smaller than a threshold.

7. The image adjusting method of claim 1, wherein a step of combining the first ROI circle with the second ROI circle while the determination of combining the first ROI circle with the second ROI circle is confirmed comprises:

setting a combined ROI (region of interest) circle containing the first ROI circle and the second ROI circle;

acquiring a center of the combined ROI circle to be a combined reference point;

setting at least one combined bridging region circle having a dimension larger than a dimension of the combined ROI circle by the combined reference point; and

utilizing a sixth scaling ratio, a seventh scaling ratio and a eighth scaling ratio to respectively adjust pixels inside the combined ROI circle, pixels between the combined bridging region circle and the combined ROI circle, and pixels out of the combined bridging region circle, wherein the sixth scaling ratio and the eighth scaling ratio are greater than the seventh scaling ratio.

8. The image adjusting method of claim 1, further comprising:

receiving an input signal; and

setting the first ROI circle on the image according to the input signal.

9. A camera with an image adjusting function, the camera comprising:

an image sensor adapted to capture at least one image; and

a processing unit coupled to the image sensor and adapted to execute an image adjusting method of setting a first ROI (region of interest) circle on the image, acquiring a center of the first ROI circle to be a first reference point, setting at least one first bridging region circle by the first reference point, and utilizing a first scaling ratio, a second scaling ratio and a third scaling ratio to respectively adjust pixels inside the first ROI circle, pixels between the first bridging region circle and the first ROI circle, and pixels between the first bridging region circle and a boundary of the image, so as to vary resolution of the whole image, wherein a dimension of the first bridging region circle is greater than a dimension of the first ROI circle, the processing unit further executing the image adjusting method of setting a second ROI (region of interest) circle on the image, acquiring a center of the second ROI circle to be a second reference point, setting at least one second bridging region circle by the second reference point, utilizing a fourth scaling ratio, a fifth scaling ratio and the third scaling ratio to respectively adjust pixels inside the second ROI circle, pixels between the second bridging region circle and the second ROI circle, and pixels out of the second bridging region circle, determining whether to combine the first ROI circle with the second ROI circle, and combining the first ROI circle with the second ROI circle while a determination of combining the first ROI circle with the second ROI circle is confirmed, wherein a dimension of the second bridging region circle is greater than a dimension of the second ROI circle.

10. The camera of claim 9, wherein the processing unit further executes the image adjusting method of setting the first ROI circle over a specific object within the image.

11. The camera of claim 9, wherein the first scaling ratio and the third scaling ratio are greater than the second scaling ratio, and the first scaling ratio, the second scaling ratio and the third scaling ratio are constant or varied according to a distance of a pixel relative to the first reference point.

12. The camera of claim 9, wherein a plurality of first bridging region circles is set on the image, dimensions of the plurality of first bridging region circles are different from each other, a scaling ratio applied to pixels between each first bridging region circle and another adjacent smaller first bridging region circle is different from a scaling ratio applied to pixels between the each first bridging region circle and another adjacent larger first bridging region circle.

13. The camera of claim 9, wherein the processing unit executes the image adjusting method of determining whether to combine the first ROI circle with the second ROI circle is represented as the processing unit determines a combination of the first ROI circle and the second ROI circle is indispensable while the adjusted first bridging region circle and the adjusted second bridging region circle are overlapped along a transverse direction or a vertical direction.

14. The camera of claim 9, wherein the processing unit executes the image adjusting method of determining whether to combine the first ROI circle with the second ROI circle is represented as the processing unit acquires a first dimensional parameter and a second dimensional parameter of a large one of the adjusted first bridging region circle and the adjusted second bridging region circle respectively along a transverse direction and a vertical direction, acquires a first boundary interval along the transverse direction and a second boundary interval along the vertical direction between the adjusted first bridging region circle and the adjusted second bridging region circle, calculates a first ratio value of the first dimensional parameter to the first boundary interval and a second ratio value of the second dimensional parameter to the second boundary interval, and determines to combine the first ROI circle with the second ROI circle while the first ratio value and the second ratio value are smaller than a threshold.

15. The camera of claim 9, wherein the processing unit executes the image adjusting method of combining the first ROI circle with the second ROI circle while the determination of combining the first ROI circle with the second ROI circle is confirmed is represented as the processing unit sets a combined ROI (region of interest) circle containing the first ROI circle and the second ROI circle, acquires a center of the combined ROI circle to be a combined reference point, sets at least one combined bridging region circle having a dimension larger than a dimension of the combined ROI circle by the combined reference point, and utilizes a sixth scaling ratio, a seventh scaling ratio and a eighth scaling ratio to respectively adjust pixels inside the combined ROI circle, pixels between the combined bridging region circle and the combined ROI circle, and pixels out of the combined bridging region circle, wherein the sixth scaling ratio and the eighth scaling ratio are greater than the seventh scaling ratio.

16. The camera of claim 9, wherein further executes the image adjusting method of receiving an input signal, and setting the first ROI circle on the image according to the input signal.

17. An image processing system capable of varying scaling ratios according to different regions on an image to provide preferred resolution for a ROI (region of interest) circle on the image, wherein the image processing system is applied to execute an image adjusting method of setting a first ROI (region of interest) circle on the image, acquiring a center of the first ROI circle to be a first reference point, setting at least one first bridging region circle by the first reference point, and utilizing a first scaling ratio, a second scaling ratio and a third scaling ratio to respectively adjust pixels inside the first ROI circle, pixels between the first bridging region circle and the first ROI circle, and pixels between the first bridging region circle and a boundary of the image, so as to vary resolution of the whole image, wherein a dimension of the first bridging region circle is greater than a dimension of the first ROI circle, the image processing system is further applied to execute the image adjusting method of setting a second ROI (region of interest) circle on the image, acquiring a center of the second ROI circle to be a second reference point, setting at least one second bridging region circle by the second reference point, utilizing a fourth scaling ratio, a fifth scaling ratio and the third scaling ratio to respectively adjust pixels inside the second ROI circle, pixels between the second bridging region circle and the second ROI circle, and pixels out of the second bridging region circle, determining whether to combine the first ROI circle with the second ROI circle, and combining the first ROI circle with the second ROI circle while a determination of combining the first ROI circle with the second ROI circle is confirmed, wherein a dimension of the second bridging region circle is greater than a dimension of the second ROI circle.