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    {
        "id": "Kopp-1998-IDD",
        "type_id": "techreport",
        "tu_id": null,
        "repositum_id": null,
        "title": "Interleaved Dimension Decomposition",
        "date": "1998-01",
        "abstract": "Wavelets in 2D or higher dimensions are often\ngenerated by a decomposition scheme from 1D wavelets. There are two\ndecomposition schemes called the standard and the nonstandard\ndecomposition which are used in most applications of higher\ndimensional wavelets. This paper introduces a new decomposition\nmethod, the interleaved dimension decomposition and compares its\nadvantages and disadvantages with the other decompositions. Based\non the properties of the interleaved dimension decomposition,\napplications to computer graphics are sketched including\nmultiresolution painting, morphing in 2D and 3D, and image\ncompression.",
        "authors_et_al": false,
        "substitute": null,
        "main_image": null,
        "sync_repositum_override": null,
        "repositum_presentation_id": null,
        "authors": [
            413,
            190
        ],
        "number": "TR-186-2-98-03",
        "pages_from": "1",
        "pages_to": "8",
        "research_areas": [],
        "keywords": [
            "Wavelets",
            "morphing",
            "multiresolution painting",
            "image compression"
        ],
        "weblinks": [],
        "files": [
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                "url": "https://www.cg.tuwien.ac.at/research/publications/1998/Kopp-1998-IDD/Kopp-1998-IDD-paper.pdf",
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        "url": "https://www.cg.tuwien.ac.at/research/publications/1998/Kopp-1998-IDD/",
        "__class": "Publication"
    },
    {
        "id": "Kopp-1998-Int",
        "type_id": "misc",
        "tu_id": null,
        "repositum_id": null,
        "title": "Interleaved Dimension Decomposition - A new  Decomposition Method for Wavelets and its Application to Computer Graphics",
        "date": "1998",
        "abstract": null,
        "authors_et_al": false,
        "substitute": null,
        "main_image": null,
        "sync_repositum_override": null,
        "repositum_presentation_id": null,
        "authors": [
            190,
            413
        ],
        "note": "In  proceedings of WSCG98, Plzen, 1998.",
        "research_areas": [],
        "keywords": [],
        "weblinks": [],
        "files": [],
        "projects_workgroups": [],
        "url": "https://www.cg.tuwien.ac.at/research/publications/1998/Kopp-1998-Int/",
        "__class": "Publication"
    },
    {
        "id": "Kopp-1997-MRM",
        "type_id": "techreport",
        "tu_id": null,
        "repositum_id": null,
        "title": "Multi-Resolution Image Morphing",
        "date": "1997-10",
        "abstract": "The proposed technique extends conventional image\nmorphing algorithms by offering additional control over the\nprocessing of the individual multi-resolutions that are used in the\nwavelet representation when moving from the source to the destination\nimage. This gives the animator the possibility to introduce a disparity\nbetween the morphing of global and detail features that can lead to\ninteresting new effects that are not achievable with traditional methods.\nThe calculation of an intermediate image in conventional image\nmorphing algorithms is done in three steps: firstly the determination\nof feature correspondence and of an intermediate feature geometry,\nsecondly the warping of the source and the destination images to\nintermediate images that match the feature geometry, and finally the\nblending of the two warped images. The proposed algorithm alters the\nthird step by making the blending dependent on the multi-resolution\nlevels using a new specialized 2D wavelet transformation.",
        "authors_et_al": false,
        "substitute": null,
        "main_image": null,
        "sync_repositum_override": null,
        "repositum_presentation_id": null,
        "authors": [
            413,
            190
        ],
        "number": "TR-186-2-97-20",
        "pages_from": "1",
        "pages_to": "11",
        "research_areas": [],
        "keywords": [
            "Animation",
            "Image Morphing",
            "Wavelets"
        ],
        "weblinks": [],
        "files": [
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                "url": "https://www.cg.tuwien.ac.at/research/publications/1997/Kopp-1997-MRM/Kopp-1997-MRM-paper.pdf",
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        "url": "https://www.cg.tuwien.ac.at/research/publications/1997/Kopp-1997-MRM/",
        "__class": "Publication"
    },
    {
        "id": "Kopp-1995-LWB",
        "type_id": "techreport",
        "tu_id": null,
        "repositum_id": null,
        "title": "Lossless Wavelet Based Image Compression with Adaptive 2D\n                 Decomposition",
        "date": "1995-11",
        "abstract": "2D wavelets are usually generated from 1D wavelets through\nthe rectangular or through the square decomposition scheme.\nIn this paper a new adaptive 2D decomposition scheme for\ncompression related applications is presented. The adaptive\n2D decomposition selects 2D wavelet functions based on the\ncompression of the coefficients, but needs only the same\nnumber of 1D filter operations as the rectangular\ndecomposition for the compression and even less for the\ndecompression. Results for lossless image compression have\nshown improvements in the compression rate between 1% and 10%\ncompared to the square decomposition. Only in the case of\nvery small images (below 50x50) the adaptive decomposition\nwas outperformed by the square decomposition because of the\noverhead to store the selection, which 2D wavelets should\n                be used.",
        "authors_et_al": false,
        "substitute": null,
        "main_image": null,
        "sync_repositum_override": null,
        "repositum_presentation_id": null,
        "authors": [
            413
        ],
        "number": "TR-186-2-95-11",
        "pages_from": "1",
        "pages_to": "9",
        "research_areas": [],
        "keywords": [
            "image compression",
            "wavelets",
            "adaptive 2D wavelet decomposition"
        ],
        "weblinks": [],
        "files": [
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                "filetitle": "paper",
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                "name": "Kopp-1995-LWB-paper.pdf",
                "type": "application/pdf",
                "size": 86974,
                "path": "Publication:Kopp-1995-LWB",
                "url": "https://www.cg.tuwien.ac.at/research/publications/1995/Kopp-1995-LWB/Kopp-1995-LWB-paper.pdf",
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        ],
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        "url": "https://www.cg.tuwien.ac.at/research/publications/1995/Kopp-1995-LWB/",
        "__class": "Publication"
    },
    {
        "id": "neumann-1995-anew",
        "type_id": "inbook",
        "tu_id": null,
        "repositum_id": null,
        "title": "A New Stochastic Radiosity Method for Highly Complex Scenes",
        "date": "1995-08",
        "abstract": "",
        "authors_et_al": false,
        "substitute": null,
        "main_image": null,
        "sync_repositum_override": null,
        "repositum_presentation_id": null,
        "authors": [
            177,
            245,
            413,
            190
        ],
        "booktitle": "In Photorealistic Rendering Techniques",
        "editor": "G. Sakas, P. Shirley, S. Müller",
        "isbn": "3540584757",
        "pages_from": "201",
        "pages_to": "213",
        "publisher": "Springer",
        "research_areas": [],
        "keywords": [],
        "weblinks": [],
        "files": [],
        "projects_workgroups": [],
        "url": "https://www.cg.tuwien.ac.at/research/publications/1995/neumann-1995-anew/",
        "__class": "Publication"
    },
    {
        "id": "kopp-1995-eff",
        "type_id": "journalpaper_notalk",
        "tu_id": null,
        "repositum_id": null,
        "title": "Efficient filter computation with symmetric matrix kernels",
        "date": "1995-02",
        "abstract": "",
        "authors_et_al": false,
        "substitute": null,
        "main_image": null,
        "sync_repositum_override": null,
        "repositum_presentation_id": null,
        "authors": [
            413
        ],
        "journal": "Proceedings of Winter School on Compuer Graphics (WSCG)",
        "pages_from": "153",
        "pages_to": "161",
        "research_areas": [],
        "keywords": [],
        "weblinks": [],
        "files": [],
        "projects_workgroups": [],
        "url": "https://www.cg.tuwien.ac.at/research/publications/1995/kopp-1995-eff/",
        "__class": "Publication"
    },
    {
        "id": "Kopp-1994-EMF",
        "type_id": "techreport",
        "tu_id": null,
        "repositum_id": null,
        "title": "Efficient 3x3 Median Filter Computations",
        "date": "1994-12",
        "abstract": "This Paper presents an efficient algorithm for\nmedian filtering with a 3x3 filter kernel with only\nabout 9 comparisons per pixel using spatial coherence\nbetween neighbouring filter computations. The basic\nalgorithm calculates two medians in one step and reuses\nsorted slices of three vertical neighbouring pixels.\nAn extension of this algorithm for 2D spatial coherence\nis also examined, which calculates four medians per step.\nEven though theoretical results would yield 5%\nperformance increase compared to the basic algorithm,\nexperimental results showed less significant increase or\n                even worse performance dependent on the hardware.",
        "authors_et_al": false,
        "substitute": null,
        "main_image": null,
        "sync_repositum_override": null,
        "repositum_presentation_id": null,
        "authors": [
            413,
            190
        ],
        "number": "TR-186-2-94-18",
        "pages_from": "1",
        "pages_to": "4",
        "research_areas": [],
        "keywords": [
            "image processing",
            "filtering",
            "3x3 median kernel",
            "spatial coherence"
        ],
        "weblinks": [],
        "files": [
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                "name": "Kopp-1994-EMF-paper.pdf",
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                "path": "Publication:Kopp-1994-EMF",
                "url": "https://www.cg.tuwien.ac.at/research/publications/1994/Kopp-1994-EMF/Kopp-1994-EMF-paper.pdf",
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        "url": "https://www.cg.tuwien.ac.at/research/publications/1994/Kopp-1994-EMF/",
        "__class": "Publication"
    },
    {
        "id": "Kopp-1994-EFC",
        "type_id": "techreport",
        "tu_id": null,
        "repositum_id": null,
        "title": "Efficient filter computation with symmetric matrix kernels",
        "date": "1994-11",
        "abstract": "This paper presents an algorithm for filter calculations\nusing symmetric matrix kernels. This algorithm outperforms\ntraditional methods for kernels larger than or equal to 5x5\non machines based on RISC designs, where the time needed to\ncalculate an addition equals the time needed for a\nmultiplication. The algorithm is based on a decomposition of\nthe kernel matrix into several kernel matrices of decreasing\nsize, which can be computed very fast because of spatial\ncoherence. A comparison with traditional methods shows the\n                efficiency of the presented approach.",
        "authors_et_al": false,
        "substitute": null,
        "main_image": null,
        "sync_repositum_override": null,
        "repositum_presentation_id": null,
        "authors": [
            413
        ],
        "number": "TR-186-2-94-4",
        "pages_from": "1",
        "pages_to": "9",
        "research_areas": [],
        "keywords": [
            "image processing",
            "anti-aliasing",
            "filtering",
            "symmetric matrix kernels",
            "spatial coherence"
        ],
        "weblinks": [],
        "files": [
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                "description": null,
                "filetitle": "paper",
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                "name": "Kopp-1994-EFC-paper.pdf",
                "type": "application/pdf",
                "size": 104469,
                "path": "Publication:Kopp-1994-EFC",
                "url": "https://www.cg.tuwien.ac.at/research/publications/1994/Kopp-1994-EFC/Kopp-1994-EFC-paper.pdf",
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        "url": "https://www.cg.tuwien.ac.at/research/publications/1994/Kopp-1994-EFC/",
        "__class": "Publication"
    },
    {
        "id": "neumann-1994-new",
        "type_id": "inproceedings",
        "tu_id": null,
        "repositum_id": null,
        "title": "A New Stochastic Radiosity Method for Highly Complex Scenes",
        "date": "1994-06",
        "abstract": "",
        "authors_et_al": false,
        "substitute": null,
        "main_image": null,
        "sync_repositum_override": null,
        "repositum_presentation_id": null,
        "authors": [
            177,
            245,
            413,
            190
        ],
        "booktitle": "Proceedings of Fifth Eurographics Workshop on Rendering",
        "note": "TALK: W. Purgathofer 14.6.1994",
        "organization": "Fifth Eurographics Workshop on Rendering",
        "research_areas": [],
        "keywords": [],
        "weblinks": [],
        "files": [],
        "projects_workgroups": [],
        "url": "https://www.cg.tuwien.ac.at/research/publications/1994/neumann-1994-new/",
        "__class": "Publication"
    },
    {
        "id": "purgathofer-1994-rad",
        "type_id": "inproceedings",
        "tu_id": null,
        "repositum_id": null,
        "title": "Radiosity for very Complex Scenes",
        "date": "1994-06",
        "abstract": "",
        "authors_et_al": false,
        "substitute": null,
        "main_image": null,
        "sync_repositum_override": null,
        "repositum_presentation_id": null,
        "authors": [
            190,
            177,
            245,
            413
        ],
        "booktitle": "Proceedings of International Conference on Computer Graphics ICCG",
        "location": "Comenius University of Bratislava, Slovakia",
        "note": "TALK: W. Purgathofer 7.6.1994",
        "organization": "International Conference on Computer Graphics ICCG",
        "research_areas": [],
        "keywords": [],
        "weblinks": [],
        "files": [],
        "projects_workgroups": [],
        "url": "https://www.cg.tuwien.ac.at/research/publications/1994/purgathofer-1994-rad/",
        "__class": "Publication"
    },
    {
        "id": "kopp-1994-xor",
        "type_id": "inbook",
        "tu_id": null,
        "repositum_id": null,
        "title": "XOR-Drawing with Guaranteed Contrast",
        "date": "1994",
        "abstract": "",
        "authors_et_al": false,
        "substitute": null,
        "main_image": null,
        "sync_repositum_override": null,
        "repositum_presentation_id": null,
        "authors": [
            413,
            249
        ],
        "booktitle": "Graphic Gems IV",
        "editor": "Paul Heckbert",
        "isbn": "0123361559",
        "pages_from": "414",
        "pages_to": "413",
        "publisher": "Morgan Kaufmann; Book&Disk edition",
        "research_areas": [],
        "keywords": [],
        "weblinks": [],
        "files": [],
        "projects_workgroups": [],
        "url": "https://www.cg.tuwien.ac.at/research/publications/1994/kopp-1994-xor/",
        "__class": "Publication"
    }
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