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Boundary tracing - Wikipedia
https://en.wikipedia.org/wiki/Boundary_Tracing
Contour Tracing | TheAILearner
https://theailearner.com/2019/08/31/contour-tracing/
Fast contour tracing algorithm Square Tracing algorithm This was one of the first approaches to extract contours and is quite simple. Suppose background is black (0’s) and object is white (1’s). Start iterating over the binary or segmented image row by row starting from left to right. If you detect white pixel (i.e. 1) go left otherwise go right.
Contour Tracing - ImageProcessingPlace
https://imageprocessingplace.com/downloads_V3/root_downloads/tutorials/contour_tracing_Abeer_George_Ghuneim/intro.html
Contour tracing is one of many preprocessing techniques performed on digital images in order to extract information about their general shape. Once the contour of a given pattern is extracted, it's different characteristics will be examined and used as features which will later on be used in pattern classification.
Suzuki’s Contour tracing algorithm OpenCV-Python
https://theailearner.com/2019/11/19/suzukis-contour-tracing-algorithm-opencv-python/
Step-1 If it’s an outer border (i.e. f ij = 1 and f i,j-1 = 0) then increment the NBD and set (i2, j2) as (i, j-1). Else if it is a hole border, increment NBD. Set (i2, j2) as (i, j+1) and LNBD = f ij in case f ij > 1. Otherwise, go to step 3. Step-2 Now, from this starting point, we will trace the border. This can be done as
Contour line - Wikipedia
https://en.wikipedia.org/wiki/Contour_line
A contour line (also isoline, isopleth, or isarithm) of a function of two variables is a curve along which the function has a constant value, so that the curve joins points of equal value. It is a plane section of the three-dimensional graph of the function parallel to the -plane.
Fast Contour-Tracing Algorithm Based on a Pixel …
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4813928/
In this paper, we propose a novel contour-tracing algorithm based on pixel following that overcomes the above-mentioned problems, i.e.,: (1) it provides fast and accurate results for contour-pixel tracing; (2) contour information can be compressed to reduce the memory size; and (3) it accurately restores the compressed data to the original ...
Contour - Wikipedia
https://en.wikipedia.org/wiki/Contour
Contour may refer to: Contour (linguistics), a phonetic sound Pitch contour Contour (camera system), a 3D digital camera system Contour, the KDE Plasma 4 interface for tablet devices Contour line, a curve along which the function has a constant value Contour drawing, an …
STPR/contour_tracing: A 2D library to trace contours.
https://github.com/STPR/contour_tracing
Core features: Trace contours using the Theo Pavlidis' algorithm (connectivity: 4-connected) Trace outlines in clockwise direction. Trace holes in counterclockwise direction. Input format: a 2D array of bits. Output format: a string of SVG Path commands. Manual parameters:
Marching squares - Wikipedia
https://en.wikipedia.org/wiki/Marching_squares
Marching squares is a computer graphics algorithm that generates contours for a two-dimensional scalar field (rectangular array of individual numerical values). A similar method can be used to contour 2D triangle meshes . The contours can be of two kinds: Isolines – lines following a single data level, or isovalue.
Connected-component labeling - Wikipedia
https://en.wikipedia.org/wiki/Connected-component_labeling
The algorithm steps can be written as: Start from the first pixel in the image. Set current label to 1. Go to (2). If this pixel is a foreground pixel and it is not already labelled, give it the current label and add it as the first element in a queue, then go to (3).
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