Image search system and image search method thereof
First Claim
1. An image search system for determining a similarity of an image whose features are represented by either one of image features amounts, an amount of color distribution features or an amount of frequency distribution features, to search for a similar image,wherein said amount of color distribution features is set to be an image feature amount obtained by dividing an image as an object representing feature into a predetermined plurality of blocks and determining a representative color of each said block to generate data of said representative color corresponding to each said block;
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means for transforming, with respect to an image set to be a target whose kind of image feature amount is to be changed among respective images to be searched and an inquiry image, a kind of image feature amount of the target image in question to make kinds of image feature amounts of each said image to be searched and said inquiry image coincident with each other; and
means for comparing the image feature amount of said inquiry image with the image feature amount of each said image to be searched based on said transformed image feature amount and determining a similarity of each image to search for a similar image;
frequency distribution feature amount transformation means for transforming an amount of frequency distribution features into an amount of color distribution features indicative of features similar to image features represented by the amount of frequency distribution features in question, andcolor distribution similarity calculation means for comparing the amount of color distribution features of said inquiry image with the amount of color distribution features of each said image to be searched and determining a similarity of each image to search for a similar image, whereinsaid frequency distribution features amount transformation means renders all the kinds of image features amounts of each image to be searched and the inquiry image into the amount of color distribution features, andsaid frequency distribution features amount transformation means includinginverse-frequency transformation means for decoding an applied amount of frequency distribution features to generate a decoded image, andcolor distribution features amount extraction means for extracting each pixel value of said decoded image as an amount of color constituent features to extract an amount of color distribution features indicative of feature similar to image features represented by said applied amount of frequency distribution features.
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Abstract
An image search system for determining a similarity of an image whose feature are represented by either one of image features amounts, a color distribution features or a frequency distribution features, to search for a similar image, including a to-be-searched image features storage unit for referring to data of an image features amount of each image to be searched, an inquiry image features input unit for receiving input of data of an image features amount of an inquiry image, a data processing unit for converting a kind of an image features amount of an image set to be an object whose kind of image features amount is to be changed to make a kind of image features amount of each image to be searched and a kind of image features amount of the inquiry image be coincident with each other, and a similarity calculation unit for comparing the image features amount of the inquiry image and the image features amount of each image to be searched based on the converted image features amount and determining a similarity of each image to search for a similar image.
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Citations
22 Claims
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1. An image search system for determining a similarity of an image whose features are represented by either one of image features amounts, an amount of color distribution features or an amount of frequency distribution features, to search for a similar image,
wherein said amount of color distribution features is set to be an image feature amount obtained by dividing an image as an object representing feature into a predetermined plurality of blocks and determining a representative color of each said block to generate data of said representative color corresponding to each said block; - and
wherein said amount of frequency distribution features is set to be an image feature amount generated by transforming an image as an object representing features into a reduced image of a fixed size and subjecting said reduced image to frequency conversion, the image search system comprising; means for transforming, with respect to an image set to be a target whose kind of image feature amount is to be changed among respective images to be searched and an inquiry image, a kind of image feature amount of the target image in question to make kinds of image feature amounts of each said image to be searched and said inquiry image coincident with each other; and means for comparing the image feature amount of said inquiry image with the image feature amount of each said image to be searched based on said transformed image feature amount and determining a similarity of each image to search for a similar image; frequency distribution feature amount transformation means for transforming an amount of frequency distribution features into an amount of color distribution features indicative of features similar to image features represented by the amount of frequency distribution features in question, and color distribution similarity calculation means for comparing the amount of color distribution features of said inquiry image with the amount of color distribution features of each said image to be searched and determining a similarity of each image to search for a similar image, wherein said frequency distribution features amount transformation means renders all the kinds of image features amounts of each image to be searched and the inquiry image into the amount of color distribution features, and said frequency distribution features amount transformation means including inverse-frequency transformation means for decoding an applied amount of frequency distribution features to generate a decoded image, and color distribution features amount extraction means for extracting each pixel value of said decoded image as an amount of color constituent features to extract an amount of color distribution features indicative of feature similar to image features represented by said applied amount of frequency distribution features. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 10, 11, 12)
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7. An image search system for determining a similarity of an image whose features are represented by either one of image features amounts, an amount of color distribution features or an amount of frequency distribution features, to search for a similar image,
wherein said amount of color distribution features is set to be an image feature amount obtained by dividing an image as an object representing feature into a predetermined plurality of blocks and determining a representative color of each said block to generate data of said representative color corresponding to each said block; - and
wherein said amount of frequency distribution features is set to be an image feature amount generated by transforming an image as an object representing features into a reduced image of a fixed size and subjecting said reduced image to frequency conversion, the image search system comprising; means for transforming, with respect to an image set to be a target whose kind of image feature amount is to be changed among respective images to be searched and an inquiry image, a kind of image feature amount of the target image in question to make kinds of image feature amounts of each said image to be searched and said inquiry image coincident with each other; means for comparing the image feature amount of said inquiry image with the image feature amount of each said image to be searched based on said transformed image feature amount and determining a similarity of each image to search for a similar image; color distribution features amount transformation conversion means for transforming an amount of color distribution features into an amount of frequency distribution features indicative of features similar to image features represented by the color distribution features in question, and frequency distribution similarity calculation means for comparing the amount of frequency distribution features of said inquiry image with the amount of frequency distribution features of each said image to be searched and determining a similarity of each image to search for a similar image, wherein said color distribution features conversion means comprising representative color determination means for determining a representative color of each bock in an applied color distribution features, image generation means for generating an image which uses the representative color of each said block as a pixel, image size change means for changing the size of the image generated by said image generation means to a predetermined size, and frequency distribution features amount extraction means for frequency-converting the image changed by said image size change means to extract an amount of frequency distribution features indicative of feature similar to the image features represented by said applied amount of color distribution features.
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13. An image search method of determining a similarity of an image whose features are represented by either one of image features amounts, an amount of color distribution features or an amount of frequency distribution features, to search for a similar image, comprising the steps of:
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with respect to an image set to be a target whose kind of image feature amount is to be converted among respective images to be searched and an inquiry image, transforming the kind of image feature amount of the target image in question to make kinds of image feature amounts of each said image to be searched and said inquiry image coincident with each other; comparing the image feature amount of said inquiry image with the image feature amount of each said image to be searched based on said converted image feature amount and determining a similarity of each image to search for a similar image; a frequency distribution features amount transformation step of transforming an amount of frequency distribution features into an amount of color distribution features indicative of feature similar to image features represented by the amount of frequency distribution features in question, and a color distribution similarity calculation step of comparing the amount of color distribution features of said inquiry image with the amount of color distribution features of each said image to be searched and determining a similarity of each image to search for a similar image, wherein said frequency distribution features amount transformation step renders all the kinds of image features amounts of each image to be searched and the inquiry image into the amount of color distribution features, and said frequency distribution features amount transformation step including an inverse-frequency transformation step of decoding an applied amount of frequency distribution features to generate a decoded image, and a color distribution features amount extraction step of extracting each pixel value of said decoded image as an amount of color constituent features to extract an amount of color distribution features indicative of feature similar to image features represented by said applied amount of frequency distribution features. - View Dependent Claims (14, 15, 16, 17, 18)
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19. An image search method of determining a similarity of an image whose features are represented by either one of image features amounts, an amount of color distribution features or an amount of frequency distribution features, to search for a similar image, comprising the steps of:
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with respect to an image set to be a target whose kind of image feature amount is to be converted among respective images to be searched and an inquiry image, transforming the kind of image feature amount of the target image in question to make kinds of image feature amounts of each said image to be searched and said inquiry image coincident with each other; comparing the image feature amount of said inquiry image with the image feature amount of each said image to be searched based on said converted image feature amount and determining a similarity of each image to search for a similar image; a color distribution features amount transformation step of transforming an amount of a color distribution features into an amount of frequency distribution features indicative of feature similar to image features represented by the amount of color distribution features in question, and a frequency distribution similarity calculation step of comparing the amount of the frequency distribution features of said inquiry image with the amount of the frequency distribution features of each said image to be searched and determining a similarity of each image to search for a similar image, wherein said color distribution features amount transformation step renders all the kinds of image features amounts of each image to be searched and the inquiry image into the amount of frequency distribution features said color distribution features amount transformation step comprising a representative color determination step of determining a representative color of each bock in an applied color distribution features, an image generation step of generating an image which uses the representative color of each said block as a pixel, an image size change step of changing the size of the image generated by said image generation step to a predetermined size, and a frequency distribution features extraction step of frequency-converting the image changed by said image size change step to extract an amount of frequency distribution features indicative of feature similar to the image features represented by said applied amount of color distribution features.
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20. A computer-readable medium tangibly embodying an image search program for determining a similarity of an image whose features are represented by either one of image features amounts, an amount of color distribution features or an amount of frequency distribution features, to search for a similar image by controlling a computer, the program comprising the functions of:
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with respect to an image set to be a target whose kind of image feature amount is to be converted among respective images to be searched and an inquiry image, transforming the kind of image feature amounts of the target image in question to make kinds of image feature amounts of each said image to be searched and said inquiry image coincident with each other; and comparing the image feature amount of said inquiry image with the image feature amount of each said image to be searched based on said converted image feature amount and determining a similarity of each image to search for a similar image; a frequency distribution features amount transformation function of transforming an amount of frequency distribution features into an amount of color distribution features indicative of feature similar to image features represented by the amount of frequency distribution features in question, and a color distribution similarity calculation function of comparing the amount of color distribution features of said inquiry image with the amount of color distribution features of each said image to be searched and determining a similarity of each image to search for a similar image, wherein said frequency distribution features amount transformation function renders all the kinds of image features amounts of each image to be searched and the inquiry image into the amount of color distribution features, and said frequency distribution features amount transformation function including an inverse-frequency transformation function of decoding an applied amount of frequency distribution features to generate a decoded image, and a color distribution features amount extraction function of extracting each pixel value of said decoded image as an amount of color constituent features to extract an amount of color distribution features indicative of feature similar to image features represented by said applied amount of frequency distribution features. - View Dependent Claims (21)
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22. A computer-readable medium tangably embodying an image search program for determining a similarity of an image whose features are represented by either one of image feature amounts, an amount of color distribution features or an amount of frequency distribution features, to search for a similar image by controlling a computer, the program comprising the functions of:
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with respect to an image set to be a target whose kind of image feature amount is to be converted among respective images to be searched and an inquiry image, transforming the kind of image feature amount of the target image in question to make kinds of image feature amounts of each said image to be searched and said inquiry image coincident with each other; comparing the image feature amount of said inquiry image with the image feature amount of each said image to be searched based on said converted image feature amount and determining a similarity of each image to search for a similar image; a color distribution features amount transformation function of transforming an amount of a color distribution features into an amount of frequency distribution features indicative of feature similar to image features represented by the amount of color distribution features in question, and a frequency distribution similarity calculation function of comparing the amount of frequency distribution features of said inquiry image with the amount of the frequency distribution features of each said image to be searched and determining a similarity of each image to search for a similar image, wherein said color distribution features amount transformation function renders all the kinds of image features amounts of each image to be searched and the inquiry image into the amount of frequency distribution features, said color distribution features amount transformation function comprising a representative color determination function of determining a representative color of each bock in an applied color distribution features, an image generation function of generating an image which uses the representative color of each said block as a pixel, an image size change function of changing the size of the image generated by said image generation function to a predetermined size, and a frequency distribution features extraction function of frequency-converting the image changed by said image size change function to extract an amount of frequency distribution features indicative of feature similar to the image features represented by said applied amount of color distribution features.
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Specification