Method of modifying the geometric orientation of an image
First Claim
1. A method of modifying the geometric orientation of a digital image in an image acquisition apparatus adapted to acquire an image from at least one of a plurality of different orientations and to store the image in a form of a compressed file, said method comprising the steps of:
- acquiring the image in a chosen orientation;
identifying the chosen orientation;
converting the image into a digital image;
spectral transforming the digital image;
determining a geometric transformation to be applied to the image acquired as a function of the chosen orientation;
applying the determined geometric transformation to symbols associated with spectral coefficients issuing in said in spectral transforming step;
recording in the compressed file two indicators representing a normal or reversed order of the symbols respectively in two directions of the digital image; and
coding the digital image in the compressed file.
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Abstract
A method of modifying the geometric orientation of a digital image in an image acquisition apparatus adapted to acquire an image in one amongst several different orientations and to store said image in the form of a compressed file, comprises the steps of acquiring an image in a chosen orientation; identifying the chosen orientation; converting said image into a digital image; spectral transformation (E10) of the digital image, determination (E12-E15) of a geometric transformation to be applied to the image acquired as a function of the chosen orientation; application (E16-E18) of the geometric transformation determined to symbols associated with spectral coefficients issuing from the spectral transformation; recording (E20), in the compressed file, two indicators representing a normal or reverse order of the symbols respectively in two directions of the digital image; and coding (E21) of the digital image in the compressed file.
Use notably in a digital photographic apparatus.
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Citations
30 Claims
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1. A method of modifying the geometric orientation of a digital image in an image acquisition apparatus adapted to acquire an image from at least one of a plurality of different orientations and to store the image in a form of a compressed file, said method comprising the steps of:
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acquiring the image in a chosen orientation;
identifying the chosen orientation;
converting the image into a digital image;
spectral transforming the digital image;
determining a geometric transformation to be applied to the image acquired as a function of the chosen orientation;
applying the determined geometric transformation to symbols associated with spectral coefficients issuing in said in spectral transforming step;
recording in the compressed file two indicators representing a normal or reversed order of the symbols respectively in two directions of the digital image; and
coding the digital image in the compressed file. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 27, 29)
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9. A device for modifying the geometric orientation of a digital image incorporated in an image acquisition apparatus adapted to acquire an image in accordance with at least one of a plurality of different orientations and to store the image in the form of a compressed file, said device comprising:
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means for acquiring the image in a chosen orientation;
means for identifying the chosen orientation;
means for converting the image into a digital image;
means for spectral transforming the digital image;
means for determining a geometric transformation to be applied to the image acquired as a function of the chosen orientation;
means for applying the determined geometric transformation to symbols associated with spectral coefficients issuing from the spectral transformation performed by said spectral transforming means;
means for recording in the compressed file two indicators representing a normal or reversed order of the symbol respectively in two directions of the digital image; and
means for coding the digital image in the compressed file. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 24, 25, 26)
a microprocessor, a read only memory containing a program for modifying the geometric orientation of the digital image, and a random access memory containing registers adapted to record variables modified during the running of the program.
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24. An image acquisition apparatus, wherein said apparatus has a geometric orientation modification device according to claim 9.
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25. A digital photographic apparatus, wherein said apparatus has a geometric orientation modification device according to claim 9.
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26. A digital camera adapted to function in a still image mode, wherein said camera has a geometric orientation modification device according to claim 9.
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18. An image processing method, implemented in an image acquisition apparatus, comprising the steps of:
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generating image data representing an image;
wavelet-transforming the image data;
quantizing the transformed data;
entropically encoding the quantized data;
identifying a correct orientation of the image represented by the image data, from among four possible orientations, as a function of the position of the image acquisition apparatus; and
applying a geometric transformation to the transformed data in accordance with the result of the identification. - View Dependent Claims (19, 20, 28, 30)
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21. An image processing apparatus, comprising:
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means for generating image data representing an image;
means for wavelet-transforming the image data;
means for quantizing the transformed data;
means for entropically encoding the quantized data;
means for identifying a correct orientation of the image represented by the image data from among four possible orientations, as a function of the position of said image processing apparatus; and
means for applying a geometric transformation to the transformed data in accordance with the result of the identification. - View Dependent Claims (22, 23)
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Specification