System and method for detecting and ranking images in order of usefulness based on vignette score
First Claim
1. A method for detecting useful images and for ranking images in order of usefulness, comprising the step of:
- a) computing a vignette score for each image in a given set of images, wherein a vignette score describes how closely an image resembles a central object surrounded by a featureless or deemphasized background; and
b) ranking the images with numerical ranks according to each image'"'"'s vignette score.
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Abstract
A system and method for detecting useful images and for ranking images in order of usefulness based on a vignette score describing how closely each one resembles a “vignette,” or a central object or image surrounded by a featureless or deemphasized background. Several methods for determining an image'"'"'s vignette score are disclosed as examples. Variance ratio analysis entails calculation of the ratio of variance between the edge region of the image and the entire image. Statistical model analysis entails developing a statistical classifier capable of determining a statistical model of each image class based on pre-entered training data. Spatial frequency analysis involves estimating the energy at different spatial frequencies in the central and edge regions and in the image as a whole. A vignette score is calculated as the ratio of mid-frequency energies in the edge region to the mid-frequency energies of the entire image.
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Citations
26 Claims
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1. A method for detecting useful images and for ranking images in order of usefulness, comprising the step of:
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a) computing a vignette score for each image in a given set of images, wherein a vignette score describes how closely an image resembles a central object surrounded by a featureless or deemphasized background; and b) ranking the images with numerical ranks according to each image'"'"'s vignette score. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for detecting useful images and for ranking images in order of usefulness, comprising the steps of:
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a) computing a vignette score for each image in a given set of images, wherein a vignette score describes how closely an image resembles a central object surrounded by a featureless or deemphasized background; b) ranking the images with numerical ranks according to each image'"'"'s vignette score; and c) selecting one or more images as one or more most representative images based on each image'"'"'s numerical rank. - View Dependent Claims (22)
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23. A system for detecting useful images and for ranking images in order of usefulness, comprising;
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a) one or more processors capable of computing a vignette score for each image in a given set of images, wherein the vignette score describes how closely an image resembles a central object surrounded by a featureless or deemphasized background and is determined using a method selected from the group consisting of variance ratio analysis, Guassian mixture model analysis, linear classifiers, support vector machines, discrete cosine transform, discrete fourier transform, Hadamard transform and wavelet transform, the one or more processors being further capable of ranking the images numerically according to each image'"'"'s vignette score; and b) a machine readable medium including operations stored thereon that when processed by the one or more processors cause a system to perform the steps of computing the vignette score for each image in the given set of images and ranking the images numerically according to each image'"'"'s vignette score.
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24. A method for detecting useful images and for ranking images in order of usefulness, comprising the steps of:
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c) allowing a user to select a set of one or more images to be ranked; d) computing a vignette score for each image in the set of images, wherein a vignette score describes how closely an image resembles a central object surrounded by a featureless or deemphasized background; and e) ranking the images with numerical ranks according to each image'"'"'s vignette score.
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25. A machine readable medium including operations stored thereon that when processed by one or more processors cause a system to perform the steps of:
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a) computing a vignette score for each image in a given set of images, wherein a vignette score describes how closely an image resembles a central object surrounded by a featureless or deemphasized background; and b) ranking the images with numerical ranks according to each image'"'"'s vignette score.
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26. A system apparatus for detecting useful images for ranking images in order of usefulness, comprising:
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means for computing a vignette score for each image in a given set of images, wherein a vignette score describes how closely an image resembles a central object surrounded by a featureless or deemphasized background; and means for ranking the images numerically according to each image'"'"'s vignette score.
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Specification