Image encoding apparatus and method, image display apparatus and method, image processing system and image sensing apparatus

An image display apparatus comprising:

• extraction means for extracting first compressed image data, which has been compressively encoded by a compressing encoding method using a discrete cosine transform, from an image file containing plural items of compressed image data encoded by compressing encoding methods that differ from one another;
• expansion means for expanding the extracted first compressed image data using an inverse discrete cosine transform;
• display-image generating means for generating image data for display by using image data obtained as a result of said expansion;
• and
• display means for displaying the image data for display,
• wherein the image file contains the first compressed image data and second compressed image data, and wherein the first compressed image data has been compressed by using a discrete cosine transform and without using a wavelet transform, and the second compressed image data has been compressed by using the wavelet transform and without using the discrete cosine transform.

An image processing system comprising:

• an image encoding apparatus for generating an image file having compressed image data obtained by compressively encoding image data, comprising:
• first encoding means for compressively encoding input image data by a compressing encoding method that uses a wavelet transform, and outputting the result as first compressed image data;
• second encoding means for compressively encoding the input image data by a compressing encoding method that uses a discrete cosine transform, and outputting the result as second compressed image data;
• and
• image file generating means for generating a single image file, representing the input image data, by using the first and second compressed image data and information relating to the first and second compressed image data, and
• an image display apparatus, comprising:
• extraction means for extracting compressed image data, which has been compressively encoded by a compressing encoding method using a discrete cosine transform, from the image file containing plural items of compressed image data encoded by compressing encoding methods that differ from one another;
• expansion means for expanding the extracted compressively encoded image data using an inverse discrete cosine transform;
• display-image generating means for generating image data for display by using image data obtained as a result of said expansion;
• and
• display means for displaying the image data for display,
• wherein the compressive encodings of said first and second encoding means are performed parallel and separately.

An image sensing apparatus comprising:

• an image encoding apparatus for generating an image file having compressed image data obtained by compressively encoding image data, comprising:
• first encoding means for compressively encoding input image data by a compressing encoding method that uses a wavelet transform, and outputting the result as first compressed image data;
• second encoding means for compressively encoding the input image data by a compressing encoding method that uses a discrete cosine transform, and outputting the result as second compressed image data;
• and
• image file generating arenas for generating a single image file, representing the input image data, by using the first and second compressed image data and information relating to the first and second compressed image data, and
• an image display apparatus comprising:
• extraction means for extracting compressed image data, which has been compressively encoded by a compressing encoding method using a discrete which has been compressively encoded by a compressing encoding method using a discrete cosine transform, from the image file containing plural items of compressed image data encoded by compressing encoding methods that differ from one another;
• expansion means for expanding the extracted compressively encoded image data using an inverse discrete cosine transform;
• display-image generating means for generating image data for display by using image data obtained as a result of said expansion;
• and
• display means for displaying the image data for display,
• wherein the compressive encodings of said first and second encoding means are performed in parallel and separately.

An image encoding method for generating an image file having compressed image data obtained by compressively encoding image data, said method comprising:

• a first encoding step, of compressively encoding input image data by a compressing encoding method that uses a wavelet transform, and outputting the result as first compressed image data;
• a second encoding step, of compressively encoding the input image data by a compressing encoding method that uses a discrete cosine transform, and outputting the result as second compressed image data;
• and
• an image file generating step, of generating a single image file, representing the input image data, by using the first and second compressed image data and information relating to the first and second compressed image data,
• wherein the compressive encodings of said first and second encoding steps are performed in parallel and separately.

An image display method comprising:

• an extraction step, of extracting first compressed image data, which has been compressively encoded by a compressing encoding method using a discrete cosine transform, from an image file containing plural items of compressed image data encoded by compressing encoding methods that differ from one another;
• an expansion step, of expanding the extracted first compressed image data using an inverse discrete cosine transform;
• a display-image generating step, of generating image data for display by using image data obtained as a result of said expansion;
• and
• a display step, of displaying the image data for display,
• wherein the image file contains the first compressed image data and second compressed image data, and wherein the first compressed image data has been compressed by using a discrete cosine transform and without using a wavelet transform, and the second compressed image data has been compressed by using the wavelet transform and without using the discrete cosine transform.

A computer-readable storage medium storing an image encoding program for generating an image file having compressed image data obtained by compressively encoding image data, said program comprising:

• program code of a first encoding step, of compressively encoding input image data by a compressing encoding method that uses a wavelet transform, and outputting the result as first compressed image data;
• program code of a second encoding step, of compressively encoding the input image data by a compressing encoding method that uses a discrete cosine transform, and outputting the result as second compressed image data;
• and
• program code of an image file generating step, of generating a single image file, representing the input image data, by using the first and second compressed image data and information relating to the first and second compressed image data,
• wherein said compressive encodings of said first and second encoding steps are performed in parallel and separately.

A computer-readable storage medium storing a program of an image display method, comprising:

• program code of an extraction step, of extracting first compressed image data, which has been compressively encoded by a compressing encoding method using a discrete cosine transform, from an image file containing plural items of compressed image data encoded by compressing encoding methods that differ from one another;
• program code of an expansion step, of expanding the extracted first compressed image data using an inverse discrete cosine transform;
• program code of a display-image generating step, of generating image data for display by using image data obtained as a result of said expansion;
• and
• program code of a display step, of displaying the image data for display,
• wherein the image file contains the first compressed image data and second compressed image data, and wherein the first compressed image data has been compressed by using a discrete cosine transform and without using a wavelet transform, and the second compressed image data has been compressed by using the wavelet transform and without using the discrete cosine transform.

An image sensing apparatus comprising:

• an image encoding apparatus for generating an image file having compressed image data obtained by compressively encoding image data, comprising:
• first encoding means for compressively encoding input image data by a compressing encoding method that uses a wavelet transform, and outputting the result as first compressed image data;
• second encoding means for compressively encoding the input image data by a compressing encoding method that uses a discrete cosine transform, and outputting the result as second compressed image data;
• and
• image file generating means for generating a single image file, representing the input image data, by using the first and second compressed image data and information relating to the first and second compressed image data,
• wherein said compressive encodings of said first and second encoding means are performed in parallel and separately.

An image sensing apparatus comprising:

• an image display apparatus comprising:
• extraction means for extracting first compressed image data, which has been compressively encoded by a compressing encoding method using a discrete cosine transform, from an image file containing plural items of compressed image data encoded by compressing encoding methods that differ from one another;
• expansion means for expanding the extracted first compressed image data using an inverse discrete cosine transform;
• display-image generating means for generating image data for display by using image data obtained as a result of said expansion;
• and
• display means for displaying the image data for display,
• wherein the image file contains the first compressed image data and second compressed image data, and wherein the first compressed image data has been compressed by using a discrete cosine transform and without using a wavelet transform, and the second compressed image data has been compressed by using the wavelet transform and without using the discrete cosine transform.

An image encoding apparatus for generating an image file having compressed image data obtained by compressively enclosing image data, comprising:

• first encoding means for compressively encoding input image data by a compressing encoding method that uses a wavelet transform, and outputting the result as first compressed image data;
• second encoding means for compressively encoding the input image data by a compressing encoding method that uses a discrete cosine transform, and outputting the result as second compressed image data;
• and
• image file generating means for generating a single image file, representing the input image data, by using the first and second compressed image data and information relating to the first and second compressed image data,
• wherein the first compressed image data is compressed without using a discrete cosine transform and the second compressed image data is compressed without using a wavelet transform.

An image encoding method for generating an image file having compressed image data obtained by compressively encoding image data, said method comprising:

• a first encoding step, of compressively encoding input image data by a compressing encoding method that uses a wavelet transform, and outputting the result as first compressed image data;
• a second encoding step, of compressively encoding the input image data by a compressing encoding method that uses a discrete cosine transform, and outputting the result as second compressed image data;
• and
• an image file generating step, of generating a single image file, representing the input image data, by using the first and second compressed image data and information relating to the first and second compressed image data,
• wherein the first compressed image data is compressed without using a discrete cosine transform and the second compressed image data is compressed without using a wavelet transform.

A computer readable storage medium storing an image encoding program for generating an image file having compressed image data obtained by compressively encoding image data, wherein said program comprises:

• program code of a first encoding step, of compressively encoding input image data by a compressing encoding method that uses a wavelet transform, and outputting the result as first compressed image data;
• program code of a second encoding step, of compressively encoding the input image data by a compressing encoding method that uses a discrete cosine transform, and outputting the result as second compressed image data;
• and
• program code of an image file generating step, of generating a single image file, representing the input image data, by using the first and second compressed image data and information relating to the first and second compressed image data,
• wherein the first compressed image data is compressed without using a discrete cosine transform and the second compressed image data is compressed without using a wavelet transform.