IMAGE SYSTEM AND DENOISING METHOD THEREOF
First Claim
Patent Images
1. An image system, comprising:
- at least one image sensor configured to continuously acquire images; and
a processing unit for determining at least one noise area according to a plurality of images acquired by the image sensor, and recording a brightness variation parameter and a phase parameter of the noise area within a reference brightness variation cycle to accordingly compensate a brightness of the noise area in current images.
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Abstract
There is provided a denoising method of an image system that detects a brightness variation cycle of ambient light sources, records a brightness variation of at least one noise area within the brightness variation cycle and compensates the brightness variation from current images thereby removing interference from the ambient light sources. There is further provided an image system.
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Citations
20 Claims
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1. An image system, comprising:
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at least one image sensor configured to continuously acquire images; and a processing unit for determining at least one noise area according to a plurality of images acquired by the image sensor, and recording a brightness variation parameter and a phase parameter of the noise area within a reference brightness variation cycle to accordingly compensate a brightness of the noise area in current images. - View Dependent Claims (2, 3, 4, 5)
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6. A denoising method of an image system, for removing interference from ambient light having a brightness variation cycle, the denoising method comprising the steps of:
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acquiring two images using an image sensor; calculating a difference of the two images to determine at least one noise area in the images; recording a brightness variation of the noise area within a reference brightness variation cycle; and acquiring two current images and calculating a current image difference, retrieving the brightness variation of the noise area of two neighboring images in the reference brightness variation cycle corresponding to sampling phases of the two current images in the brightness variation cycle, and subtracting the retrieved brightness variation from the current image difference. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A denoising method of an image system, comprising the steps of:
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acquiring, using an image sensor, a plurality of images to determine at least one noise area; recording a brightness variation parameter and a phase parameter of the noise area within a reference brightness variation cycle; and compensating a brightness of the noise area in current images acquired by the image sensor according to the brightness variation parameter and the phase parameter. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification