AMBIENT LIGHT SENSING DEVICE AND METHOD, AND INTERACTIVE DEVICE USING SAME
First Claim
1. An ambient light sensing device for receiving at least one visible light image sensed by an image sensor installed within a portable electronic device, wherein the image sensor provides both a photo taking or video recording function and an ambient light sensing function, the ambient light sensing device comprising:
- an image sampling unit, forobtaining the at least one visible light image from the image sensor, wherein each of the at least one visible light image is one undivided image frame when the image sampling unit obtains the at least one visible light image from the image sensor,dividing the visible light image into a plurality of image blocks according to a predetermined arrangement of sizes and locations of the plurality of image blocks, wherein each image block includes a plurality of pixel units and is located at a different location in the visible light image,extracting at least one sample data in each image block, andcomparing the sample data extracted at different time points of the same image block at the same location to generate a comparison data according to a difference between the sample data extracted at different time points; and
an analyzing unit, for analyzing the comparison data and generating an output analysis signal accordingly, wherein the output analysis signal includes an ambient brightness signal representing a sensing result of ambient light brightness.
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Abstract
The invention provides an ambient light sensing device which receives at least one visible light image sensed by an image sensor. The ambient light sensing device includes an image sampling unit and an analyzing unit. The image sampling unit divides the visible light image into plural image blocks, extracts at least one sample data in each image block, and generates a comparison data according to a difference between the sample data extracted at different time points. The analyzing unit analyzes the comparison data and generates an output analysis signal accordingly.
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Citations
30 Claims
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1. An ambient light sensing device for receiving at least one visible light image sensed by an image sensor installed within a portable electronic device, wherein the image sensor provides both a photo taking or video recording function and an ambient light sensing function, the ambient light sensing device comprising:
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an image sampling unit, for obtaining the at least one visible light image from the image sensor, wherein each of the at least one visible light image is one undivided image frame when the image sampling unit obtains the at least one visible light image from the image sensor, dividing the visible light image into a plurality of image blocks according to a predetermined arrangement of sizes and locations of the plurality of image blocks, wherein each image block includes a plurality of pixel units and is located at a different location in the visible light image, extracting at least one sample data in each image block, and comparing the sample data extracted at different time points of the same image block at the same location to generate a comparison data according to a difference between the sample data extracted at different time points; and an analyzing unit, for analyzing the comparison data and generating an output analysis signal accordingly, wherein the output analysis signal includes an ambient brightness signal representing a sensing result of ambient light brightness. - View Dependent Claims (2, 3, 4, 5, 6, 7, 22, 23, 28)
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8. An interactive device, comprising:
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an image sensor, for providing a photo taking or video recording function for the interactive device, and also for providing an ambient light sensing function to generate an image according to ambient light; and an ambient light sensing device, for obtaining the image from the image sensor, wherein the image is one undivided image frame when the ambient light sensing device obtains the image from the image sensor, dividing the image into a plurality of image blocks according to a predetermined arrangement of sizes and locations of the plurality of image blocks, wherein each image block includes a plurality of pixel units and is located at a different location in the image, extracting at least one sample data in the image, generating a comparison data according to a difference between the sample data extracted at different time points, and analyzing the comparison data to generate an output analysis signal accordingly, wherein the output analysis signal includes an ambient brightness signal representing a sensing result of ambient light brightness, wherein the interactive device is a portable electronic device. - View Dependent Claims (10, 12, 13, 14, 21, 24, 25, 29)
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9. (canceled)
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11. (canceled)
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15. A method of sensing ambient light, comprising:
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obtaining an image according to ambient light by an image sensor provided in an interactive device, the image sensor being configured to provide a photo taking or video recording function for an interactive device, and also to provide an ambient light sensing function to generate the image according to ambient light; obtaining the image from the image sensor wherein the image is one undivided image frame; dividing the image into a plurality of image blocks according to a predetermined arrangement of the sizes and locations of the plurality of image blocks, wherein each image block includes a plurality of pixel units and is located at a different location in the visible light image; extracting at least one sample data in the image; comparing the sample data extracted at different time points of the same image block at the same location to generate a comparison data according to a difference between the sample data extracted at different time points; and analyzing the comparison data to generate an output analysis signal accordingly, wherein the output analysis signal includes an ambient brightness signal representing a sensing result of ambient light brightness, wherein the interactive device is a portable electronic device. - View Dependent Claims (17, 18, 19, 20, 26, 27, 30)
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16. (canceled)
Specification