Segmentation of heterogeneous document images : an ... - Tel

tel-00912566, version 1 - 2 Dec 2013
Match counting, 33
Maximal empty rectangles, 18, 19
Maximum likelihood, 68
Message passing algorithm, 70
Minimum spanning tree, 23, 32, 100,
101
Monte Carlo method, 68
Morphological closing, 16
Morphological hole-filling, 16
Morphological opening, 16, 20
Morphological operators, 32
Multi-layer perceptron, 16
Multi-resolution morphology, 16
Mumford-Shah functional, 32
Neuro-fuzzy approach, 21
Newton’s method, 71
Niblack binarization, 36
Noise removal, 5
Non-stationary Gabor filters, 111
Normalization factor, 55
Observations, 57
OCRopus, 2
OpenCV, 46, 116
Optical character recognition, 2
Orientation of auto-correlation, 17
Otsu’s binarization, 36
Paragraph detection, 5
Part-of-speech tagging, 53, 71
Partition function, 55, 71
Piecewise projections, 27
Pixel density features, 18
Pixel hit rate, 34
Polynomial spline wavelets, 20
Prima Layout Evaluation, 11, 98, 105
Projection based line detection, 27
Projection based methods, 25
QT, 116
Quad-tree, 17
Quasi-Newton methods, 71
Radon transform, 17
RapidMiner, 44
Run-length features, 18
Run-length smearing, 18, 19
Run-lengths, 59
Sauvola binarization, 36
Skewed text lines, 24
Slanted text lines, 22
Smoothed projection profile, 87
Spline wavelets, 18
Steepest ascent algorithm, 71
Steerable directional filter, 32
Stroke level properties, 14
Sum-product algorithm, 70
Support vector machine, 16, 17, 45
Tesseract-OCR, 2, 98
Text line detection, 5, 21
Text region detection, 5, 18
Text/Graphics separation, 5
Texture-based region detection, 18, 20
Top-down approach, 18
Touching text lines, 22
Transition probability, 92
Turbo decoding, 68
Variational methods, 68
Vehicle’s plates registration, 21
Viterbi algorithm, 29, 56, 68, 88
Voronoi diagram, 18, 19
Voronoi++, 19
Voted perceptron, 69, 104
Wavelet analysis, 17
Wavelet filters, 20
Wavelet packets, 18
Whitespace analysis, 18, 19
X-Y cut, 18, 27
128