Effective product family based development depends on exploiting the commonality and variability in customer requirements. The desirability of variability in products is driven by the (manifest and hidden) needs of the various target market segments identified by various organizational units like sales and marketing. These are informed by other critical components of the context in which produc...

Software product lines are a widely accepted strategy to develop software products with variable features. Deriving a product line from existing customised product copies is still an open issue. Existing approaches try to extract encapsulated reusable components, or analyse features on a product management level. However, support for understanding implementation differences and designing variat...

This paper is about line matching by line–point invariants which encode local geometric information between a line and its neighboring points. Specifically, two kinds of line–point invariants are introduced in this paper, one is an affine invariant constructed from one line and two points while the other is a projective invariant constructed from one line and four points. The basic idea of our ...

This paper is concerned with using linear features in aerial triangulation. Without loss of generality, the focus is on straight lines with the attempt to treat tie lines in the same fashion as tie points. The parameters of tie lines appear in the block adjustment like the tie points do. This requires a unique representation of lines in object space. We propose a four-parameter representation t...

The proposed technique deals with jigsaw puzzles and takes advantage of both geometrical and color features. It is considered that an image is being divided into pieces. The shape of these pieces is not predefined, yet the background’s color is. The whole method concerns a recurrent algorithm, which initially, finds the most important corner points around the contour of a piece, afterwards perf...

In this paper, we propose an object detection/recognition algorithm based on a new set of shape-driven features and morphological operators. Each object class is modeled by the corner points (junctions) on its contour. We design two types of shape-context like features between the corner points, which are efficient to compute and effective in capturing the underlying shape deformation. In the t...

High volume automated manufacturing lines often run at efficiencies as low as seventy percent-even for well-understood, mature products. Despite continuous improvement efforts over the last two decades that resulted in increased line speed, overall line efficiency (the actual number of parts produced divided by the maximum number of parts the line is capable of producing) has typically remained...

Let P be a set of n points in the plane. A connecting line of P is a line that passes through at least two of its points. A connecting line is called ordinary if it is incident on exactly two points of P. If the points of P are not collinear then such a line exists. In fact, there are Ω(n) such lines [8]. In this note, we present a very simple algorithm for finding an ordinary line, assuming th...

This paper provides a detailed analysis of fuzzy point, fuzzy line segment, fuzzy distance and the angle between two fuzzy line segments. Two new concepts, same points and inverse points, are defined for this analysis. The basic properties of fuzzy distance, ideas about the containment of a fuzzy point on a fuzzy line segment and the coincidence of two fuzzy points are also described. A linear ...