Circular markers are widely used in image-based measurement fields, eg vision system
calibration, displacement measurement, and vibration monitoring. Generally, the marker …

Two different vision-based methods for remote and multipoint deflection measurement of
large-scale bridges are developed. In Method 1, the deflection is obtained by detecting the …

The paper presents an Image-based Method for Crack Analysis (IMCA) which is capable of
processing a sequence of digital imagery to perform a twofold task:(i) the extraction of crack …

The most accurate star centroiding method for star sensors is the Gaussian fitting (GF)
algorithm, because the intensity distribution of a star spot conforms to the Gaussian function …

Area-based image matching and sub-pixel displacement estimation using similarity
measures are common methods that are used in various fields. Sub-pixel estimation using …

Traditionally, most camera calibrations rely on a planar target with well-known marks.
However, the localization error of the marks in the image is a source of inaccuracy. We …

The star tracker is one of the most promising attitude measurement devices used in
spacecraft due to its extremely high accuracy. However, high dynamic performance is still …

Circular targets, as one of typical image features, are widely used in image-based
measurement, such as photogrammetry, displacement sensing, and vibration monitoring …

The burst bubble rate has been strongly linked to froth stability, and thus, it is always used
for performance prediction or modeling in the froth flotation. Due to different bubble motions …

This paper presents details of a coded target system that employs polar coordinate
transformation and segment matching to automatically recognise and identify targets in …