US Patent No: 5,384,904
Number of patents in Portfolio can not be more than 2000
Image scaling using real scale factors
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Jan 24, 1995
Issued date -
Dec 8, 1992
filing date -
07/987,725
serial no -
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Abstract
A method for performing scaling of a video image uses a noninteger scale factor. The scaling using a series of images scaled according to integer powers of two. An integer scale factor is applied to the image to be scaled in order to provide a series of scaled images. A determination is made which scaled image is the closest image to the one corresponding to the fractional scale factor. The scaled image selected in this manner is then operated upon using an interpolation to obtain the value corresponding to the fractional scale factor. Alternatively, the two scaled images which are closest to the image corresponding to the fractional scale factor may be selected and an interpolation operation or an averaging operation of the two scaled images may be performed to obtain the factional scale image. The scaled images may be predetermined during off-line operations so that a plurality of image selections may be performed upon the same set of predetermined scaled images.
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,716,404 Image retrieval method and apparatus using annotations as guidance information | 79 | 1984 | |
| 4,847,788 Graphic data processing method and system | 62 | 1986 | |
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| 5,253,338 Semi-automatic image tracing method | 17 | 1990 | |
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| 4,872,064 System for selective scaling of digital video images | 47 | 1987 | |
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| 5,276,780 Filing system | 16 | 1991 | |
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| 5,184,306 Automated high-precision fabrication of objects of complex and unique geometry | 160 | 1991 | |