| 摘要 |
Disclosed are an image encoding apparatus and method for generating an image file in which it is possible to check the content of an image, which has been compressively encoded using a wavelet transform, not only in an apparatus that is capable of expanding compressed image data compressively encoded using a wavelet transform but also in an apparatus that is capable of expanding compressed image data compressively encoded using a discrete cosine transform (DCT) but incapable of expanding image data compressively encoded using a wavelet transform. The image encoding apparatus has a first compressing encoder 2 for performing compressing encoding using a wavelet transform and a second compressing encoder for performing compressing encoding using a discrete cosine transform. First and second compressed image data resulting from this encoding is gathered in a single image file in a file creation unit 4 . By analyzing the image file using a file analyzer 6 , even an apparatus having only expansion means that uses DCT can check the content of an image if the apparatus expands the second compressed image data.
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