Document image enhancement

... and document image super-resolution [11] In this thesis, we focus on three aspects of the document enhancement techniques: document image binarization, web image enhancement and document image ... ways of image distortion could lead to the same degraded document image This thesis focuses on three aspects of the document enhancement techniques including document...

Ngày tải lên: 09/09/2015, 10:06

... – f2(m, n)  It has applications in image segmentation and enhancement 18 f1(m, n): Image before dye injection f2(m, n): Image after dye injection g(m, n): Image after dye injection, followed ... enhancement 30  The shape of a histogram provides useful information for contrast enhancement 31 The original image displayed The histogram of the original image 10000 5000 0 The s...

Ngày tải lên: 26/01/2015, 10:18

... môn xử lý ảnh số - ĐHBK Hà nội 85 Chng Bn: X Lí V NNG CAO CHT LNG NH a)nh gc (chuyn i t nh mu sang nh mc xỏm) b) nh qua lc trung bỡnh Nhập môn xử lý ảnh số - ĐHBK Hà nội 86 Chng Bn: X Lí V NNG CAO ... Nhập môn xử lý ảnh số - ĐHBK Hà nội 79 Chng Bn: X Lí V NNG CAO CHT LNG NH a)nh mu cựng vi lc xỏm Ch s mu cao nht:243 b)nh õm bn cựng vi lc xỏm (ng vi phộp bin i f(x) =...

Ngày tải lên: 13/08/2013, 14:57

... Biomedical Engineering Image Enhancement -4- Digital Image Processing Image Enhancement -5- Digital Image Processing Department of Biomedical Engineering Image Enhancement -6- Digital Image Processing ... Engineering Image Enhancement -7- Digital Image Processing Department of Biomedical Engineering Image Enhancement -8- Digital Image Processing Department of Bio...

Ngày tải lên: 12/09/2013, 00:06

... X-ray image, and that is the target for research The aim of image processing and image segmentation is to autodetect tuberculosis cavities, which is one of the most difficult tasks in image processing ... X-ray image, and that is the target for research In spite of the characteristic noise, the lowpass filter and high-pass filter could not directly reveal tuberculosis cavities...

Ngày tải lên: 15/03/2014, 03:20

Ngày tải lên: 08/05/2014, 15:56

... this article as: Wang et al.: A scale-based forward -and- backward diffusion process for adaptive image enhancement and denoising EURASIP Journal on Advances in Signal Processing 2011 2011:22 Page ... camera and tripod This example clearly illustrates that the scale-based classification map readily indicate locations of highly homogeneous, detail and edge regions 3.2...

Ngày tải lên: 21/06/2014, 02:20

... peculiarity of the input image CONCLUSIONS A method for automatic exposure correction, improved by different feature extraction techniques, has been described Content- Dependent Exposure Correction ... Visibility image construction The visibility image is obtained by computing the mean of the extracted Y and the offset from desired exposure by applying (9) Once the offset...

Ngày tải lên: 23/06/2014, 01:20

... APPLICATION TO COLOR IMAGES When the amount of noise corruption is limited, the application of our method to noisy color images is straightforward Piecewise Linear Model-Based Image Enhancement (a) ... Thurnhofer, “Two-dimensional Teager filters,” in Nonlinear Piecewise Linear Model-Based Image Enhancement [12] [13] [14] [15] [16] [17] [18] [19] [20] Image Processing, S K...

Ngày tải lên: 23/06/2014, 01:20

... approach from the Tobacco-800 document image database [1, 16] Matching and Retrieval 4.1 Overview Given a query logo instance and a database of detected logos, our goal of logo matching is to compute ... underlying transformations (affine for linear and TPS for non-linear transformation), which improves shape matching and discrimination Shape contexts method gives the best...

Ngày tải lên: 31/12/2014, 06:07

...  Image enhancement in the spatial domain can be represented as: Transformation Enhanced Image g(m,n) = T(f)(m,n) Given Image  The transformation T maybe linear ... original image is added back to the highpass filtered version of f The result is the original image with the edges enhanced relative to the original image 28 Highpass filtering Original Image High-boost ... fi...

Ngày tải lên: 26/01/2015, 09:32

... The concept of filtering is easier to visualize in the frequency domain Therefore, enhancement of image f(m,n) can be done in the frequency domain, based on its DFT F(u,v) This is particularly ... Enhanced Image g(m,n) = h(m,n)*f(m,n) Given Image may be computationally unattractive  We can therefore directly design a transfer function H(u,v) and implement the enhancement in...

Ngày tải lên: 26/01/2015, 10:06

... Significance 1.2.1 1.2.2 Saliency- based Low-level Image Enhancement 1.2.3 1.3 Saliency- enhanced Aesthetics Evaluation Saliency- based Image Recomposition and Image Retargeting Thesis ... aesthetics score of similar images to guide image enhancement Next, we introduce saliency retargeting, a novel low-level image enhancement approach aimed to enhance image aestheti...

Ngày tải lên: 09/09/2015, 10:14

... access these imaged documents effectively and efficiently, similar to retrieving text format documents produced by computer software Information retrieval for handwritten document images is more ... nowadays, imaged documents are stored as image format without complete recognition and conversion by OCR, but with adequate index for access and retrieval To achieve document image ret...

Ngày tải lên: 09/09/2015, 11:07