9 research outputs found

    ΠœΠ΅Ρ‚ΠΎΠ΄ ΠΏΠΎΠ²Ρ‹ΡˆΠ΅Π½ΠΈΡ контраста мСдицинских Π²ΠΈΠ΄Π΅ΠΎΠΈΠ·ΠΎΠ±Ρ€Π°ΠΆΠ΅Π½ΠΈΠΉ с Π°Π΄Π°ΠΏΡ‚ΠΈΠ²Π½ΠΎΠΉ Π³Π»ΡƒΠ±ΠΈΠ½ΠΎΠΉ ΠΊΠΎΡ€Ρ€Π΅ΠΊΡ†ΠΈΠΈ для систСм ΠΏΠΎΠ΄Π΄Π΅Ρ€ΠΆΠΊΠΈ Π²Ρ€Π°Ρ‡Π΅Π±Π½Ρ‹Ρ… Ρ€Π΅ΡˆΠ΅Π½ΠΈΠΉ

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    Introduction. When conducting diagnostic examination of patients, various technological means are used to identify pathological conditions timely and accurately. The rapid development of sensors and imaging devices, as well as the advancement of modern diagnostic methods, facilitate the transition from the visual examination of images performed by a medical specialist towards the widespread use of automated diagnostic systems referred to as clinical decision support systems.Aim. To develop a method for enhancing the contrast of endoscopic images taking into account their features with the purpose of increasing the efficiency of medical diagnostic systems.Materials and methods. Contrast enhancement inevitably leads to an increase in the noise level. Despite the large number of different methods for noise reduction, their use at the preliminary stage of correction leads to the loss of small but important details. The development of a method for enhancing the contrast of endoscopic images was based on a nonlinear transformation of the intensity of pixels, taking into account their local neighborhood. Regression analysis was used to obtain a functional dependence between the depth of contrast correction and the degree of detail of the processed pixel neighborhood.Results. The results of experimental evaluation and comparison with conventional methods show that, under a comparable level of contrast enhancement, the proposed method provides a greater value of the structural similarity index towards to the original image (0.71 versus 0.63), with the noise level reduced by 17 %.Conclusion. In comparison with conventional methods, the developed method provides a simultaneous contrast correction of both light and dark image fragments and limits the growth of the noise level (typical of similar methods) by adapting the correction depth to the neighborhood features of the processed image element.Π’Π²Π΅Π΄Π΅Π½ΠΈΠ΅. ΠŸΡ€ΠΈ ΠΏΡ€ΠΎΠ²Π΅Π΄Π΅Π½ΠΈΠΈ диагностичСского осмотра ΠΈΠ»ΠΈ лСчСния Π²Ρ€Π°Ρ‡Ρƒ трСбуСтся быстро ΠΈ Ρ‚ΠΎΡ‡Π½ΠΎ Π²Ρ‹ΡΠ²Π»ΡΡ‚ΡŒ ΠΈ Π»ΠΎΠΊΠ°Π»ΠΈΠ·ΠΎΠ²Ρ‹Π²Π°Ρ‚ΡŒ Π°Π½ΠΎΠΌΠ°Π»ΠΈΠΈ ΠΈ заболСвания, для Ρ‡Π΅Π³ΠΎ ΠΈΡΠΏΠΎΠ»ΡŒΠ·ΡƒΡŽΡ‚ΡΡ, Π² Ρ‚ΠΎΠΌ числС, ΠΈ тСхничСскиС срСдства. БыстроС Ρ€Π°Π·Π²ΠΈΡ‚ΠΈΠ΅ Ρ‚Π΅Ρ…Π½ΠΎΠ»ΠΎΠ³ΠΈΠΉ Π² области Π΄Π°Ρ‚Ρ‡ΠΈΠΊΠΎΠ², устройств Π²ΠΈΠ·ΡƒΠ°Π»ΠΈΠ·Π°Ρ†ΠΈΠΈ ΠΈ ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠ² диагностики обСспСчиваСт ΠΏΠ»Π°Π½ΠΎΠΌΠ΅Ρ€Π½Ρ‹ΠΉ ΠΏΠ΅Ρ€Π΅Ρ…ΠΎΠ΄ ΠΎΡ‚ Π°Π½Π°Π»ΠΈΠ·Π° ΠΈΠ·ΠΎΠ±Ρ€Π°ΠΆΠ΅Π½ΠΈΠΉ Π²Ρ€Π°Ρ‡ΠΎΠΌ ΠΊ ΡˆΠΈΡ€ΠΎΠΊΠΎΠΌΡƒ использованию Π°Π²Ρ‚ΠΎΠΌΠ°Ρ‚ΠΈΠ·ΠΈΡ€ΠΎΠ²Π°Π½Π½Ρ‹Ρ… диагностичСских систСм – систСм ΠΏΠΎΠ΄Π΄Π΅Ρ€ΠΆΠΊΠΈ принятия Π²Ρ€Π°Ρ‡Π΅Π±Π½Ρ‹Ρ… Ρ€Π΅ΡˆΠ΅Π½ΠΈΠΉ.ЦСль Ρ€Π°Π±ΠΎΡ‚Ρ‹. Π Π°Π·Ρ€Π°Π±ΠΎΡ‚ΠΊΠ° ΠΌΠ΅Ρ‚ΠΎΠ΄Π° ΠΏΠΎΠ²Ρ‹ΡˆΠ΅Π½ΠΈΡ контраста эндоскопичСских ΠΈΠ·ΠΎΠ±Ρ€Π°ΠΆΠ΅Π½ΠΈΠΉ с ΡƒΡ‡Π΅Ρ‚ΠΎΠΌ ΠΈΡ… особСнностСй с Ρ†Π΅Π»ΡŒΡŽ увСличСния эффСктивности мСдицинских диагностичСских систСм.ΠœΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»Ρ‹ ΠΈ ΠΌΠ΅Ρ‚ΠΎΠ΄Ρ‹. ΠŸΠΎΠ²Ρ‹ΡˆΠ΅Π½ΠΈΠ΅ контраста Π½Π΅ΠΈΠ·Π±Π΅ΠΆΠ½ΠΎ ΠΏΡ€ΠΈΠ²ΠΎΠ΄ΠΈΡ‚ ΠΊ росту уровня ΡˆΡƒΠΌΠΎΠ². ΠŸΡ€ΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ Π½Π° ΠΏΡ€Π΅Π΄Π²Π°Ρ€ΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎΠΌ этапС ΠΊΠΎΡ€Ρ€Π΅ΠΊΡ†ΠΈΠΈ извСстных ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠ² ΡˆΡƒΠΌΠΎΠΏΠΎΠ΄Π°Π²Π»Π΅Π½ΠΈΡ Π²Π»Π΅Ρ‡Π΅Ρ‚ Π·Π° собой, ΠΊΠ°ΠΊ ΠΏΡ€Π°Π²ΠΈΠ»ΠΎ, ΠΏΠΎΡ‚Π΅Ρ€ΡŽ ΠΌΠ΅Π»ΠΊΠΈΡ… Π΄Π΅Ρ‚Π°Π»Π΅ΠΉ, ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Π΅ Π²Π°ΠΆΠ½ΠΎ ΡΠΎΡ…Ρ€Π°Π½ΠΈΡ‚ΡŒ ΠΏΡ€ΠΈ ΠΎΠ±Ρ€Π°Π±ΠΎΡ‚ΠΊΠ΅. Π Π°Π·Ρ€Π°Π±ΠΎΡ‚Π°Π½ ΠΌΠ΅Ρ‚ΠΎΠ΄ ΠΏΠΎΠ²Ρ‹ΡˆΠ΅Π½ΠΈΡ контраста эндоскопичСских ΠΈΠ·ΠΎΠ±Ρ€Π°ΠΆΠ΅Π½ΠΈΠΉ, Π² основС ΠΊΠΎΡ‚ΠΎΡ€ΠΎΠ³ΠΎ Π»Π΅ΠΆΠΈΡ‚ Π½Π΅Π»ΠΈΠ½Π΅ΠΉΠ½ΠΎΠ΅ ΠΏΡ€Π΅ΠΎΠ±Ρ€Π°Π·ΠΎΠ²Π°Π½ΠΈΠ΅ яркости пиксСлов, ΡƒΡ‡ΠΈΡ‚Ρ‹Π²Π°ΡŽΡ‰Π΅Π΅ ΠΈΡ… Π»ΠΎΠΊΠ°Π»ΡŒΠ½ΡƒΡŽ ΠΎΠΊΡ€Π΅ΡΡ‚Π½ΠΎΡΡ‚ΡŒ. Π€ΡƒΠ½ΠΊΡ†ΠΈΠΎΠ½Π°Π»ΡŒΠ½Π°Ρ Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡ‚ΡŒ ΠΌΠ΅ΠΆΠ΄Ρƒ Π³Π»ΡƒΠ±ΠΈΠ½ΠΎΠΉ ΠΊΠΎΡ€Ρ€Π΅ΠΊΡ†ΠΈΠΈ контраста ΠΈ ΠΎΡ†Π΅Π½ΠΊΠΎΠΉ Π΄Π΅Ρ‚Π°Π»ΡŒΠ½ΠΎΡΡ‚ΠΈ окрСстности ΠΎΠ±Ρ€Π°Π±Π°Ρ‚Ρ‹Π²Π°Π΅ΠΌΠΎΠ³ΠΎ пиксСла ΠΏΠΎΠ»ΡƒΡ‡Π΅Π½Π° с ΠΏΠΎΠΌΠΎΡ‰ΡŒΡŽ рСгрСссионного Π°Π½Π°Π»ΠΈΠ·Π°.Π Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹. Π Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ ΡΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½ΠΎΠΉ ΠΎΡ†Π΅Π½ΠΊΠΈ ΠΈ сравнСниС с Π°Π½Π°Π»ΠΎΠ³ΠΎΠΌ ΠΏΠΎΠΊΠ°Π·Ρ‹Π²Π°ΡŽΡ‚, Ρ‡Ρ‚ΠΎ ΠΏΡ€ΠΈ сопоставимом ΡƒΡ€ΠΎΠ²Π½Π΅ ΠΏΠΎΠ²Ρ‹ΡˆΠ΅Π½ΠΈΡ контраста обСспСчСно большСС Π·Π½Π°Ρ‡Π΅Π½ΠΈΠ΅ индСкса структурного сходства с исходным ΠΈΠ·ΠΎΠ±Ρ€Π°ΠΆΠ΅Π½ΠΈΠ΅ΠΌ (0.71 ΠΏΡ€ΠΎΡ‚ΠΈΠ² 0.63 Ρƒ Π°Π½Π°Π»ΠΎΠ³Π°) ΠΏΡ€ΠΈ ΡƒΠΌΠ΅Π½ΡŒΡˆΠ΅Π½ΠΈΠΈ роста уровня ΡˆΡƒΠΌΠΎΠ² Π½Π° 17 %.Π—Π°ΠΊΠ»ΡŽΡ‡Π΅Π½ΠΈΠ΅. ΠœΠ΅Ρ‚ΠΎΠ΄ обСспСчиваСт ΠΊΠΎΡ€Ρ€Π΅ΠΊΡ†ΠΈΡŽ контраста ΠΎΠ΄Π½ΠΎΠ²Ρ€Π΅ΠΌΠ΅Π½Π½ΠΎ ΠΊΠ°ΠΊ свСтлых, Ρ‚Π°ΠΊ ΠΈ Ρ‚Π΅ΠΌΠ½Ρ‹Ρ… Ρ„Ρ€Π°Π³ΠΌΠ΅Π½Ρ‚ΠΎΠ² изобраТСния ΠΈ ΠΎΠ³Ρ€Π°Π½ΠΈΡ‡ΠΈΠ²Π°Π΅Ρ‚ ΠΏΡ€ΠΈ этом рост ΡˆΡƒΠΌΠΎΠ²ΠΎΠΉ ΡΠΎΡΡ‚Π°Π²Π»ΡΡŽΡ‰Π΅ΠΉ (Ρ…Π°Ρ€Π°ΠΊΡ‚Π΅Ρ€Π½Ρ‹ΠΉ для ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠ² этого класса) ΠΏΠΎ ΡΡ€Π°Π²Π½Π΅Π½ΠΈΡŽ со стандартными ΠΌΠ΅Ρ‚ΠΎΠ΄Π°ΠΌΠΈ посрСдством Π°Π΄Π°ΠΏΡ‚Π°Ρ†ΠΈΠΈ Π³Π»ΡƒΠ±ΠΈΠ½Ρ‹ ΠΊΠΎΡ€Ρ€Π΅ΠΊΡ†ΠΈΠΈ ΠΊ свойствам окрСстности ΠΎΠ±Ρ€Π°Π±Π°Ρ‚Ρ‹Π²Π°Π΅ΠΌΠΎΠ³ΠΎ элСмСнта изобраТСния

    Fast Multi-Scale Detail Decomposition via Accelerated Iterative Shrinkage

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    International audienceWe present a fast solution for performing multi-scale detail decomposition. The proposed method is based on an accelerated iterative shrinkage algorithm, able to process high definition color images in real-time on modern GPUs. Our strategy to accelerate the smoothing process is based on the use of first order proximal operators. We use the approximation to both designing suitable shrinkage operators as well as deriving a proper warm-start solution. The method supports full color filtering and can be implemented efficiently and easily on both the CPU and the GPU. We demonstrate the performance of the proposed approach on fast multi-scale detail manipulation of low and high dynamic range images and show that we get good quality results with reduced processing time

    Review of Noise Reduction Methods and Estimation of their Effectiveness for Medical Endoscopic Images Processing

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    The paper is devoted to the analysis of the efficiency of different algorithms for noise reduction on medical images in endoscopy. The algorithms of adaptive median filtering., KNN filtering., block matching filtering (Non local means and 3DBM) are analyzed. The conclusions and the recommendations for the implementation of these algorithms in clinical decision support systems in endoscopy are given

    Π Π°Π·Ρ€Π°Π±ΠΎΡ‚ΠΊΠ° нСйросСтСвого ΠΏΠΎΠ΄Ρ…ΠΎΠ΄Π° сСгмСнтации ΠΈ распознавания Π½ΠΎΠΌΠ΅Ρ€Π½Ρ‹Ρ… Π·Π½Π°ΠΊΠΎΠ² Π°Π²Ρ‚ΠΎΠΌΠΎΠ±ΠΈΠ»Π΅ΠΉ Π½Π° изобраТСниях Ρ€Π΅Π°Π»ΡŒΠ½Ρ‹Ρ… сцСн

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    ΠžΠ±ΡŠΠ΅ΠΊΡ‚ΠΎΠΌ исслСдования ΡΠ²Π»ΡΡŽΡ‚ΡΡ ΠΌΠ΅Ρ‚ΠΎΠ΄Ρ‹ искусствСнного ΠΈΠ½Ρ‚Π΅Π»Π»Π΅ΠΊΡ‚Π°, ΠΈΡΠΏΠΎΠ»ΡŒΠ·ΡƒΠ΅ΠΌΡ‹Π΅ Π² Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌΠ°Ρ… сСгмСнтации ΠΈ распознавания Π°Π²Ρ‚ΠΎΠΌΠΎΠ±ΠΈΠ»ΡŒΠ½Ρ‹Ρ… Π½ΠΎΠΌΠ΅Ρ€Π½Ρ‹Ρ… Π·Π½Π°ΠΊΠΎΠ². ЦСлью Ρ€Π°Π±ΠΎΡ‚Ρ‹ являСтся Ρ€Π°Π·Ρ€Π°Π±ΠΎΡ‚ΠΊΠ° ΠΈ рСализация Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌΠ° дСтСктирования ΠΈ распознавания Π°Π²Ρ‚ΠΎΠΌΠΎΠ±ΠΈΠ»ΡŒΠ½Ρ‹Ρ… Π½ΠΎΠΌΠ΅Ρ€Π½Ρ‹Ρ… Π·Π½Π°ΠΊΠΎΠ² Π½Π° изобраТСниях Ρ€Π΅Π°Π»ΡŒΠ½Ρ‹Ρ… сцСн с ΠΏΡ€ΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ΠΌ Π°ΠΏΠΏΠ°Ρ€Π°Ρ‚Π° искусствСнных Π½Π΅ΠΉΡ€ΠΎΠ½Π½Ρ‹Ρ… сСтСйThe object of research is the artificial intelligence methods used in the segmentation and recognition of automobile license plates. The aim of the work is to develop and implement an algorithm for detecting and recognizing car license plates on images of real scenes using the apparatus of artificial neural network

    Π Π°Π·Ρ€Π°Π±ΠΎΡ‚ΠΊΠ° нСйросСтСвого ΠΏΠΎΠ΄Ρ…ΠΎΠ΄Π° сСгмСнтации ΠΈ распознавания Π½ΠΎΠΌΠ΅Ρ€Π½Ρ‹Ρ… Π·Π½Π°ΠΊΠΎΠ² Π°Π²Ρ‚ΠΎΠΌΠΎΠ±ΠΈΠ»Π΅ΠΉ Π½Π° изобраТСниях Ρ€Π΅Π°Π»ΡŒΠ½Ρ‹Ρ… сцСн

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    ΠžΠ±ΡŠΠ΅ΠΊΡ‚ΠΎΠΌ исслСдования ΡΠ²Π»ΡΡŽΡ‚ΡΡ ΠΌΠ΅Ρ‚ΠΎΠ΄Ρ‹ искусствСнного ΠΈΠ½Ρ‚Π΅Π»Π»Π΅ΠΊΡ‚Π°, ΠΈΡΠΏΠΎΠ»ΡŒΠ·ΡƒΠ΅ΠΌΡ‹Π΅ Π² Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌΠ°Ρ… сСгмСнтации ΠΈ распознавания Π°Π²Ρ‚ΠΎΠΌΠΎΠ±ΠΈΠ»ΡŒΠ½Ρ‹Ρ… Π½ΠΎΠΌΠ΅Ρ€Π½Ρ‹Ρ… Π·Π½Π°ΠΊΠΎΠ². ЦСлью Ρ€Π°Π±ΠΎΡ‚Ρ‹ являСтся Ρ€Π°Π·Ρ€Π°Π±ΠΎΡ‚ΠΊΠ° ΠΈ рСализация Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌΠ° дСтСктирования ΠΈ распознавания Π°Π²Ρ‚ΠΎΠΌΠΎΠ±ΠΈΠ»ΡŒΠ½Ρ‹Ρ… Π½ΠΎΠΌΠ΅Ρ€Π½Ρ‹Ρ… Π·Π½Π°ΠΊΠΎΠ² Π½Π° изобраТСниях Ρ€Π΅Π°Π»ΡŒΠ½Ρ‹Ρ… сцСн с ΠΏΡ€ΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ΠΌ Π°ΠΏΠΏΠ°Ρ€Π°Ρ‚Π° искусствСнных Π½Π΅ΠΉΡ€ΠΎΠ½Π½Ρ‹Ρ… сСтСйThe object of research is the artificial intelligence methods used in the segmentation and recognition of automobile license plates. The aim of the work is to develop and implement an algorithm for detecting and recognizing car license plates on images of real scenes using the apparatus of artificial neural network
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