17 research outputs found

    Parallel algorithms for image segmentation

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    Pushing the Boundaries of Boundary Detection using Deep Learning

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    In this work we show that adapting Deep Convolutional Neural Network training to the task of boundary detection can result in substantial improvements over the current state-of-the-art in boundary detection. Our contributions consist firstly in combining a careful design of the loss for boundary detection training, a multi-resolution architecture and training with external data to improve the detection accuracy of the current state of the art. When measured on the standard Berkeley Segmentation Dataset, we improve theoptimal dataset scale F-measure from 0.780 to 0.808 - while human performance is at 0.803. We further improve performance to 0.813 by combining deep learning with grouping, integrating the Normalized Cuts technique within a deep network. We also examine the potential of our boundary detector in conjunction with the task of semantic segmentation and demonstrate clear improvements over state-of-the-art systems. Our detector is fully integrated in the popular Caffe framework and processes a 320x420 image in less than a second.Comment: The previous version reported large improvements w.r.t. the LPO region proposal baseline, which turned out to be due to a wrong computation for the baseline. The improvements are currently less important, and are omitted. We are sorry if the reported results caused any confusion. We have also integrated reviewer feedback regarding human performance on the BSD benchmar

    ΠŸΡ€ΠΎΠ³Ρ€Π°ΠΌΠ½Π° систСма для дослідТСння ΠΏΠ°Ρ€Π°Π»Π΅Π»ΡŒΠ½ΠΈΡ… Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌΡ–Π² Π· використанням ΠΎΠ±Ρ‡ΠΈΡΠ»Π΅Π½ΡŒ Π½Π° Π³Ρ€Π°Ρ„Ρ–Ρ‡Π½ΠΎΠΌΡƒ процСсорі

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    Π ΠΎΠ·Ρ€ΠΎΠ±Π»Π΅Π½ΠΎ ΠΏΡ€ΠΎΠ³Ρ€Π°ΠΌΠ½Π΅ забСзпСчСння для дослідТСння ΠΏΠ°Ρ€Π°Π»Π΅Π»ΡŒΠ½ΠΈΡ… Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌΡ–Π² сСгмСнтації Π·ΠΎΠ±Ρ€Π°ΠΆΠ΅Π½ΡŒ Π· використанням ΠΎΠ±Ρ‡ΠΈΡΠ»Π΅Π½ΡŒ Π½Π° Π³Ρ€Π°Ρ„Ρ–Ρ‡Π½ΠΎΠΌΡƒ процСсоріThe software for the study of parallel algorithms for image segmentation using computation on GPUs is developed and presente

    О подсистСмС Π°Π΄Π°ΠΏΡ‚Π°Ρ†ΠΈΠΈ интСрфСйса для лСксикографичСского ΡƒΠΊΡ€Π°ΠΈΠ½ΠΎ-русско-английского словаря с ΡƒΡ‡Π΅Ρ‚ΠΎΠΌ ΠΈΠ½Π΄ΠΈΠ²ΠΈΠ΄ΡƒΠ°Π»ΡŒΠ½Ρ‹Ρ… психофизиологичСских особСнностСй личности

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    ΠŸΡ€ΠΎΠ΄Π΅ΠΌΠΎΠ½ΡΡ‚Ρ€ΠΈΡ€ΠΎΠ²Π°Π½Π° Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡ‚ΡŒ Π°Π΄Π°ΠΏΡ‚Π°Ρ†ΠΈΠΈ интСрфСйса для лСксикографичСского словаря Π½Π° основС ΠΈΠ½Π΄ΠΈΠ²ΠΈΠ΄ΡƒΠ°Π»ΡŒΠ½Ρ‹Ρ… психофизиологичСских особСнностях ΠΏΠΎΠ»ΡŒΠ·ΠΎΠ²Π°Ρ‚Π΅Π»ΡThe work is devoted to adapting the interface to the lexicographic dictionary based on individual psychophysiological characteristics of the use

    ΠŸΡ€ΠΎΠ³Ρ€Π°ΠΌΠ½Π° систСма для дослідТСння ΠΏΠ°Ρ€Π°Π»Π΅Π»ΡŒΠ½ΠΈΡ… Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌΡ–Π² Π· використанням ΠΎΠ±Ρ‡ΠΈΡΠ»Π΅Π½ΡŒ Π½Π° Π³Ρ€Π°Ρ„Ρ–Ρ‡Π½ΠΎΠΌΡƒ процСсорі

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    Π ΠΎΠ·Ρ€ΠΎΠ±Π»Π΅Π½ΠΎ ΠΏΡ€ΠΎΠ³Ρ€Π°ΠΌΠ½Π΅ забСзпСчСння для дослідТСння ΠΏΠ°Ρ€Π°Π»Π΅Π»ΡŒΠ½ΠΈΡ… Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌΡ–Π² сСгмСнтації Π·ΠΎΠ±Ρ€Π°ΠΆΠ΅Π½ΡŒ Π· використанням ΠΎΠ±Ρ‡ΠΈΡΠ»Π΅Π½ΡŒ Π½Π° Π³Ρ€Π°Ρ„Ρ–Ρ‡Π½ΠΎΠΌΡƒ процСсоріThe software for the study of parallel algorithms for image segmentation using computation on GPUs is developed and presente

    Saliency Tree: A Novel Saliency Detection Framework

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    Learning-Based Symmetry Detection in Natural Images

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    International audienceIn this work we propose a learning-based approach to sym- metry detection in natural images. We focus on ribbon-like structures, i.e. contours marking local and approximate reflection symmetry and make three contributions to improve their detection. First, we create and make publicly available a ground-truth dataset for this task by build- ing on the Berkeley Segmentation Dataset. Second, we extract features representing multiple complementary cues, such as grayscale structure, color, texture, and spectral clustering information. Third, we use super- vised learning to learn how to combine these cues, and employ MIL to accommodate the unknown scale and orientation of the symmetric struc- tures. We systematically evaluate the performance contribution of each individual component in our pipeline, and demonstrate that overall we consistently improve upon results obtained using existing alternatives

    БистСма розпізнавання Π°Ρ€Ρ…Ρ–Ρ‚Π΅ΠΊΡ‚ΡƒΡ€Π½ΠΈΡ… Π΅Π»Π΅ΠΌΠ΅Π½Ρ‚Ρ–Π² Π½Π° основі Π½Π΅ΠΉΡ€ΠΎΠ½Π½ΠΈΡ… ΠΌΠ΅Ρ€Π΅ΠΆ

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    Π‘Π°ΠΊΠ°Π»Π°Π²Ρ€ΡΡŒΠΊΠ° Ρ€ΠΎΠ±ΠΎΡ‚Π° ΠΌΡ–ΡΡ‚ΠΈΡ‚ΡŒ ΠΎΠΏΡ‚ΠΈΠΌΡ–Π·Π°Ρ†Ρ–ΡŽ Π·Π°Π΄Π°Ρ‡Ρ– розпізнавання Π°Ρ€Ρ…Ρ–Ρ‚Π΅ΠΊΡ‚ΡƒΡ€Π½ΠΈΡ… Π΅Π»Π΅ΠΌΠ΅Π½Ρ‚Ρ–Π² Ρ‚Π° формування Π½Π°Π±Π»ΠΈΠΆΠ΅Π½ΠΎΡ— вартості нСрухомості. Π ΠΎΠ·Ρ€ΠΎΠ±Π»Π΅Π½ΠΎ Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌ для підвищСння точності Ρ€ΠΎΠ·Ρ€Π°Ρ…ΡƒΠ½ΠΊΡ–Π².Bachelor's work contains optimization of the task of recognizing architectural elements and forming the approximate cost of real estate. An algorithm is developed for increasing the accuracy of calculations.Бакалаврская Ρ€Π°Π±ΠΎΡ‚Π° содСрТит ΠΎΠΏΡ‚ΠΈΠΌΠΈΠ·Π°Ρ†ΠΈΡŽ Π·Π°Π΄Π°Ρ‡ΠΈ распознавания Π°Ρ€Ρ…ΠΈΡ‚Π΅ΠΊΡ‚ΡƒΡ€Π½Ρ‹Ρ… элСмСнтов ΠΈ формирования ΠΏΡ€ΠΈΠ±Π»ΠΈΠΆΠ΅Π½Π½ΠΎΠΉ стоимости нСдвиТимости. Π Π°Π·Ρ€Π°Π±ΠΎΡ‚Π°Π½ Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌ для ΠΏΠΎΠ²Ρ‹ΡˆΠ΅Π½ΠΈΡ точности расчСтов
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