Pixel shifting image sensor with a different number of images sensed in each mode
First Claim
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1. An image sensing apparatus which obtains an image of high resolution by using pixel shifting technique, comprising:
- image sensing means for sensing an image of an object to obtain image data;
shifting means for shifting image formation position of the image of the object on said image sensing means;
selection means for selecting one of a plurality of image sensing modes each of which performs image sensing operation using different pixel shifting methods wherein said plurality of image sensing modes include a first image sensing mode for performing a first plural number of pixel shifting operations and a second image sensing mode for performing a second plural number of pixel shifting, operations, wherein said second plural number is different from said first plural number; and
combining means which combines images of said first plural number in said first image sensing mode and images of said second plural number in said second image sensing mode respectively.
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Abstract
An image sensing apparatus has a plurality of image sensing modes each of which performs image sensing operation using different pixel shifting method. One of these image sensing modes is selected through a selection unit in accordance with an object to be sensed, and a plurality of images of the object are sensed in image sensing position arrays on the basis of the selected image sensing mode. A combining unit combines the plurality of sensed images to obtain a single still image of high resolution.
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Citations
23 Claims
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1. An image sensing apparatus which obtains an image of high resolution by using pixel shifting technique, comprising:
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image sensing means for sensing an image of an object to obtain image data;
shifting means for shifting image formation position of the image of the object on said image sensing means;
selection means for selecting one of a plurality of image sensing modes each of which performs image sensing operation using different pixel shifting methods wherein said plurality of image sensing modes include a first image sensing mode for performing a first plural number of pixel shifting operations and a second image sensing mode for performing a second plural number of pixel shifting, operations, wherein said second plural number is different from said first plural number; and
combining means which combines images of said first plural number in said first image sensing mode and images of said second plural number in said second image sensing mode respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
recording means for recording the image data obtained by said image sensing means into a storage medium; and
compression means for compressing the image data in different compression ratio in accordance with a speed of writing and reading of said recording means.
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21. The image sensing apparatus according to claim 20, wherein the speed of writing and reading of said recording means is measured between the time when the storage medium is attached to the image sensing apparatus and when an image sensing operation starts.
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22. The image sensing apparatus according to claim 20, wherein the compression ratio of the image data obtained by said image sensing means to compressed image data becomes high when the speed of said recording means to write and read to and from a storage medium is slow.
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23. The image sensing apparatus according to claim 20, wherein coefficients to be multiplied to the image data of each color are adjusted so that the image data of each color at a white point has a same value before compressing the image data by said compression means.
Specification