Image pickup device and image synthesis method thereof
First Claim
1. An image pickup device for shooting a scene, comprising:
- an image-pickup module, arranged for capturing a plurality of temporary images of the scene;
an image-synthesis module, arranged for extracting a part of each of the temporary images, combining the parts of the temporary images to form a panorama temporary image, and splitting the panorama temporary image into a plurality of zone-areas according to at least one threshold value and a panorama luminosity histogram of the panorama temporary image;
a database, arranged for storing a lookup table that records a plurality of exposure values, and the plurality of exposure values corresponding to a luminance value of each the zone-area respectively; and
a processing module, arranged for obtaining the plurality of exposure values corresponding to the luminance values respectively from the database, obtaining a weighting-exposure value by an equation, and controlling the image-pickup module to perform a panorama image capturing process according to the weighting-exposure value;
wherein, the equation is to multiply each of the exposure values by a ratio of the zone-area corresponding to each of the luminance values to the total area and then sum up the products to generate the weighting-exposure value.
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Abstract
This invention discloses an image pickup device and an image synthesis method thereof The image pickup device comprises an image-pickup module, an image-synthesis module, a database and a processing module. The image-pickup module captures a plurality of temporary images of a scene. The image-synthesis module extracts a part of each temporary image and combines the parts to form a panorama temporary image, and splits the panorama temporary image into a plurality of zone-areas according to at least one threshold value and a panorama luminosity histogram. The database stores a lookup table for recording a plurality of exposure values. The plurality of the exposure values correspond to luminance values of the zone-areas respectively. The processing module obtains the plurality of exposure values corresponding to the luminance values and obtains a weighting-exposure value by an equation, and controls the image-pickup module to capture the panorama image according to the weighting-exposure value.
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Citations
15 Claims
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1. An image pickup device for shooting a scene, comprising:
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an image-pickup module, arranged for capturing a plurality of temporary images of the scene; an image-synthesis module, arranged for extracting a part of each of the temporary images, combining the parts of the temporary images to form a panorama temporary image, and splitting the panorama temporary image into a plurality of zone-areas according to at least one threshold value and a panorama luminosity histogram of the panorama temporary image; a database, arranged for storing a lookup table that records a plurality of exposure values, and the plurality of exposure values corresponding to a luminance value of each the zone-area respectively; and a processing module, arranged for obtaining the plurality of exposure values corresponding to the luminance values respectively from the database, obtaining a weighting-exposure value by an equation, and controlling the image-pickup module to perform a panorama image capturing process according to the weighting-exposure value; wherein, the equation is to multiply each of the exposure values by a ratio of the zone-area corresponding to each of the luminance values to the total area and then sum up the products to generate the weighting-exposure value. - View Dependent Claims (2, 3, 4, 5)
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6. An image synthesis method for shooting a scene, comprising the steps of:
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capturing a plurality of temporary images of the scene by an image-pickup module; extracting a part of each of the temporary images and combining the parts to form a panorama temporary image by an image-synthesis module; splitting the panorama temporary image into a plurality of zone-areas according to at least one threshold value and a panorama luminosity histogram of the panorama temporary image by the image-synthesis module; providing a database to store a lookup table that records a plurality of exposure values, and the plurality of exposure values corresponding to luminance values of each the zone-areas respectively; using a processing module to obtain the plurality of exposure values corresponding to the luminance values respectively from the database, and multiply each of the exposure value by a ratio of the zone-area corresponding to the luminance value to the total area, and then sum up the products to generate a weighting-exposure value; and controlling the image-pickup module to perform a panorama image capturing process according to the weighting-exposure value by the processing module. - View Dependent Claims (7, 8, 9, 10)
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11. An image pickup device, comprising:
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an exposure module, arranged for metering a scene to produce a plurality of temporary exposure values; an image-pickup module, arranged for capturing a plurality of temporary images from the scene according to each of the temporary exposure values; an image-synthesis module, arranged for extracting a part of each of the temporary images, combining the parts of the temporary images to form a panorama temporary image, and splitting the panorama temporary image into a plurality of zone-areas according to at least one threshold value and a panorama luminosity histogram of the panorama temporary image; a database, arranged for storing a lookup table that records a plurality of exposure values, and the plurality of exposure values corresponding to luminance values of each the zone-area respectively; and a processing module, arranged for obtaining the plurality of exposure values corresponding to the luminance values respectively from the database, using an equation to obtain a weighting-exposure value, and controlling the image-pickup module to perform a panorama image capturing process according to the weighting-exposure value; wherein the equation is to multiply each of the exposure values by a ratio of the zone-area corresponding to each of the luminance values to the total area and then sum up the products to generate the weighting-exposure value. - View Dependent Claims (12, 13, 14, 15)
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Specification