عنوان انگلیسی مقاله:
Fractional means based method for multi-oriented keyword spotting in video/scene/license plate images
ترجمه فارسی عنوان مقاله:
روش مبتنی بر ابزار جز به جز برای تشخیص کلیدواژه چند گرایشی در تصاویر ویدیو / صحنه / پلاک
Sciencedirect - Elsevier - Expert Systems With Applications, 118 (2019) 1-19: doi:10:1016/j:eswa:2018:08:015
Palaiahnakote Shivakumara a , Sangheeta Roy a , HamidA. Jalab a , RabhaW. Ibrahim a , Umapada Pal b , Tong Lu c , ∗, Vijeta Khare a , Ainuddin Wahid Bin Abdul Wahab
Retrieving desired information from databases containing video, natural scene, and license plate images through keyword spotting is a big challenge to expert systems due to different complexities that occur because of background and foreground variations of texts in real-time environments. To reduce back- ground complexity of input images, we introduce a new model based on fractional means that considers neighboring information of pixels to widen the gap between text and background. To do so, the process obtains text candidates with the help of k-means clustering. The proposed approach explores the com- bination of Radon and Fourier coefficients to define context features based on regular patterns given by coefficient distributions for foreground and background of text candidates. This process eliminates non- text candidates regardless of different font types and sizes, colors, orientations and scripts, and results in representatives of texts. The proposed approach then exploits the fact that text pixels share almost the same values to restore missing text components using Canny edge image by proposing a new idea of minimum cost path based ring growing, and then outputs keywords. Furthermore, the proposed ap- proach extracts the same above-mentioned features locally and globally for spotting words from images. Experimental results on different benchmark databases, namely, ICDAR 2013, ICDAR 2015, YVT, NUS video data, ICDAR 2013, ICDAR 2015, SVT, MSRA, UCSC, Medialab and Uninusubria license plate data show that the proposed method is effective and useful compared to the existing methods.
Keywords: Text candidates | Fractional mean Radon | coefficient | Fourier coefficient | Context features | Minimum cost path estimation | Ring growing | Word detection | Keyword spotting