Shake correcting apparatus and method thereof in digital photographing apparatus
View Patent ↗Provided are a method and apparatus for correcting a shake of a digital photographing apparatus. The method includes sensing a shake via an inertial sensor comprised in the digital photographing apparatus, and calculating a first shake value; comparing the first shake value with a predetermined threshold value and, when the first shake value is greater than the predetermined threshold value, driving an OIS (optical image stabilizer); detecting an edge component of an image of a target subject, wherein the image is input via an imaging device of the digital photographing apparatus, and calculating a second shake value from a difference value between edge values of sequential frames of the input image; and comparing the second shake value with the first shake value, and according to a result of the comparing, controlling a shake of the target subject to be corrected.
1. A method of correcting a shake of a digital photographing apparatus, the method comprising:
sensing a shake via an inertial sensor comprised in the digital photographing apparatus, and calculating a first shake value;
comparing the first shake value with a predetermined threshold value and, when the first shake value is greater than the predetermined threshold value, driving an OIS (optical image stabilizer);
detecting an edge component of an image of a target subject, wherein the image is input via an imaging device of the digital photographing apparatus, and calculating a second shake value from a difference value between edge values of sequential frames of the input image; and
comparing the second shake value with the first shake value, and according to a result of the comparing, controlling a shake of the target subject to be corrected.
2. The method of claim 1 , when the second shake value is greater than the first shake value, further comprising driving the OIS so as to correct the shake of the target subject according to the second shake value.
3. The method of claim 1 , when the second shake value is greater than the first shake value, further comprising correcting the shake of the target subject based on the input image according to the second shake value.
4. The method of claim 1 , when the second shake value is less than the first shake value, further comprising driving the OIS so as to correct the shake of the target subject according to the first shake value.
5. The method of claim 1 , when the second shake value is less than the first shake value, further comprising correcting the shake of the target subject based on the input image according to the first shake value.
6. The method of claim 1 , wherein the OIS comprises a lens or an imaging device.
7. The method of claim 1 , wherein the image is a target subject image input during an exposure time period of the imaging device of the digital photographing apparatus.
8. The method of claims 1 , wherein the shake of the target subject is corrected by selecting an intermediate frame image from among sequential frames of the input image according to the second shake value or the first shake value.
9. The method of claim 1 , wherein the shake of the target subject is corrected by composing images respectively obtained via a high ISO (International Organization for Standardization) value and a low ISO value according to the second shake value or the first shake value.
10. A computer program product, comprising:
a computer-readable medium comprising:
a first set of codes for causing a computer to sense a shake via an inertial sensor comprised in the digital photographing apparatus, and calculating a first shake value;
a second set of codes for causing a computer to compare the first shake value with a predetermined threshold value and, when the first shake value is greater than the predetermined threshold value, driving an OIS (optical image stabilizer);
a third set of codes for causing a computer to detect an edge component of an image of a target subject, wherein the image is input via an imaging device of the digital photographing apparatus, and calculating a second shake value from a difference value between edge values of sequential frames of the input image; and
a forth set of codes for causing a computer to compare the second shake value with the first shake value, and according to a result of the comparing, controlling a shake of the target subject to be corrected.
11. A shake correcting apparatus of a digital photographing apparatus, the shake correcting apparatus comprising:
a first shake calculating unit configured to sense a shake via an inertial sensor comprised in the digital photographing apparatus, and to calculate a first shake value;
an edge detecting unit for configured to detect an edge component of an image of a target subject, wherein the image is input via an imaging device of the digital photographing apparatus;
a second shake calculating unit configured to calculate a second shake value from a difference value between edge values of sequential frames of the input image; and
a control unit configured to compare the first shake value with a predetermined threshold value and, when the first shake value is greater than the predetermined threshold value, driving an OIS (optical image stabilizer), and configured to compare the second shake value with the first shake value, and according to a result of the comparing, to control a shake of the target subject to be corrected.
12. The shake correcting apparatus of claim 11 , wherein, when the second shake value is greater than the first shake value, the control unit is configured to drive the OIS so as to correct the shake of the target subject according to the second shake value.
13. The shake correcting apparatus of claim 11 , further comprising an image correcting unit configured to correct the shake of the target subject based on the input image according to the second shake value when the second shake value is greater than the first shake value.
14. The shake correcting apparatus of claim 11 , wherein, when the second shake value is less than the first shake value, the control unit is configured to drive the OIS so as to correct the shake of the target subject according to the first shake value.
15. The shake correcting apparatus of claim 11 , further comprising an image correcting unit configured to correct the shake of the target subject based on the input image according to the first shake value when the second shake value is less than the first shake value.
16. The shake correcting apparatus of claim 11 , wherein the OIS comprises a lens or an imaging device.
17. The shake correcting apparatus of claim 16 , wherein the control unit controls at least one of an optical driving unit or an imaging device control unit so as to drive the lens or the imaging device.
18. The shake correcting apparatus of claim 11 , wherein the inertial sensor includes at least one of an acceleration sensor, an angular sensor, an angular acceleration sensor, and an impulse sensor.
19. The shake correcting apparatus of claim 11 , wherein the image correcting unit is configured to correct the shake of the target subject by selecting an intermediate frame image from among sequential frames of the input image according to one of the second shake value or the first shake value.
20. The shake correcting apparatus of claim 11 , wherein the image correcting unit is configured to correct the shake of the target subject by composing images respectively obtained via a high ISO (International Organization for Standardization) value and a low ISO value according to the second shake value or the first shake value.