Technical limitations in image capturing usually impose defective, such as contrast degradation. There are different approaches to improve the contrast of an image. Among the exiting approaches, un-sharp masking is a popular method due to its simplicity in implementation and computation. There is an important parameter in un-sharp masking, named gain factor, which affects the quality of the enh...

BACKGROUND The activity of the Bicoid (Bcd) transcription factor is a useful example of how quantitative information contained in a smooth morphogen gradient is transformed into discrete and precise patterns of target gene expression. There are two distinct and important aspects to this process: the "sharpening" of the posterior borders of the expression domains and the "precision" of where the...

A set is an unordered (unless otherwise specified) collection of elements of the same type, usually expressed using the following notation: {elem1, elem2, elem3, . . .} A tuple is an ordered collection of elements, not necessarily of the same type, expressed using the following notation: (elem1, elem2, elem3, . . .) Most of the times, we don’t give too much attention to the actual elements them...