Particle size distribution is a key factor in determining the efficiency of most granular and powder based operations. One of the oldest and most popular methods of size analysis is sieving or screening where particles are classified according to their passage through an aperture of known size having either circular or square shape with the particle size being the diameter or the side dimension of this aperture. The need for on-line particle size analysers was one of the motivations to introduce image-based particle size analysis systems to many industries. In general, the sequential steps of how these systems work can be summarised as follows: -Acquisition of raw images from the scene, improving their quality and segment particles profiles. -Extraction of size related data from particle -Transformation of the measured data to the required particle size distribution. -Application of correction factors to compensate for particle overlap and segregation. Therefore, this book is an attempt to develop a new technique which measures two parameters from each particle profile. The accuracy of the proposed technique has been investigated in both the laboratory and the field.

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