Image calibration method and related image calibration device
An image calibration method is applied to an image calibration device includes an image receiver and an operation processor. The image calibration method of providing a motion deblur function includes driving a first camera to capture a first image having a first exposure time, driving a second camera disposed adjacent to the first camera to capture a second image having a second exposure time different from and at least partly overlapped with the first exposure time, and fusing a first feature of the first image and a second feature of the second image to generate a fusion image.
1 . An image calibration method of providing a motion deblur function, comprising:
driving a first camera to capture a first image having a first exposure time;
extracting a dark region of the first image to set as a first feature;
driving a second camera disposed adjacent to the first camera to capture a second image having a second exposure time different from and at least partly overlapped with the first exposure time, wherein the first exposure time is greater than the second exposure time;
extracting a bright region of the second image to set as a second feature; and
fusing the first feature of the first image and the second feature of the second image to generate a fusion image;
wherein the first camera and the second camera are disposed adjacent to each other and face toward the same region;
wherein the first camera comprises a Near-Infrared (NIR) sensor or a Monochrome sensor while the second camera comprises a RGB sensor; or the first camera comprises a Monochrome sensor while the second camera comprises a Near-Infrared (NIR) sensor.
2 . The image calibration method of claim 1 , further comprising:
driving the first camera to capture the first image at a starting point of time; and
driving the second camera to capture the second image at the starting point of time.
3 . The image calibration method of claim 1 , further comprising:
driving the first camera to finish capturing of the first image at an ending point of time; and
driving the second camera to finish capturing of the second image at the ending point of time.
4 . The image calibration method of claim 1 , further comprising:
driving the first camera to execute capturing of the first image from a starting point of time to an ending point of time; and
driving the second camera to execute capturing of the second image between the starting point of time and the ending point of time.
5 . The image calibration method of claim 1 , further comprising:
driving a third camera to capture a third image having a third exposure time different from and at least partly overlapped with the first exposure time and the second exposure time; and
fusing a third feature of the third image with the first feature of the first image and the second feature of the second image to generate the fusion image.
6 . The image calibration method of claim 1 , further comprising:
utilizing a timer to drive the first camera and the second camera to respectively capture the first image having the first exposure time and the second image having the second exposure time.
7 . The image calibration method of claim 1 , further comprising:
executing local alignment for the first image and the second image so as to fuse the first image and the second image after the local alignment for generating the fusion image.
8 . The image calibration method of claim 1 , wherein the image calibration method determines at least one pixel of the first image belongs to the dark region when a pixel value of the at least one pixel conforms to a predefined threshold.
9 . The image calibration method of claim 1 , wherein the image calibration method determines a plurality of pixels of the first image belongs to the dark region when an average pixel value of the plurality of pixels conforms to a predefined threshold.
10 . An image calibration device, comprising:
an image receiver adapted to receive a first image captured by a first camera and a second image captured by a second camera; and
an operation processor electrically connected to the image receiver, the operation processor outputting a control command for extracting a dark region of the first image to set as a first feature, driving the first camera to capture the first image having a first exposure time and driving the second camera to capture the second image having a second exposure time different from and at least partly overlapped with the first exposure time, extracting a bright region of the second image to set as a second feature, and further receiving the first image and the second image via the image receiver so as to fuse the first feature of the first image and the second feature of the second image to generate a fusion image;
wherein the first exposure time is greater than the second exposure time;
wherein the first camera and the second camera are disposed adjacent to each other and face toward the same region;
wherein the first camera comprises a Near-Infrared (NIR) sensor or a Monochrome sensor while the second camera comprises a RGB sensor; or the first camera comprises a Monochrome sensor while the second camera comprises a Near-Infrared (NIR) sensor.
11 . The image calibration device of claim 10 , wherein the image calibration device further comprises a timer electrically connected to the operation processor, the operation processor utilizes the timer to drive the first camera and the second camera to respectively capture the first image having the first exposure time and the second image having the second exposure time.
12 . The image calibration device of claim 10 , wherein the operation processor executes local alignment for the first image and the second image, and fuses the first image and the second image after the local alignment to generate the fusion image.