Transcription of IMAGE PROCESSING TECHNIQUES
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IMAGE PROCESSING TECHNIQUES
Part 1: IMAGE PROCESSING 1 IMAGE PROCESSING TECHNIQUESThis part deals with the formation, acquisition and PROCESSING of images. Its contents can bebest represented as a diagram where the evolution of the considered information (images)and the processes involved are Level ImageImage Acquisitionelectron-solid interactiondetection of elastically & in-elastically scattered electronsImage EnhancementImage SegmentationBinary ImageDataImage Measurementanalog-to-digital 1: IMAGE PROCESSING Basics of IMAGE formationSince only the images obtained by a scanning electron microscope (SEM) and a transmissionelectron microscope (TEM) were used in this work and since both TECHNIQUES are well-established, only a brief introduction is given on the principles and instrumentation of SEMand TEM aiming to show what kind of information is expressed through the imagesobtained by these IMAGE is the optical representation of an object illuminated by
electron images. The signal which was formed in the detector, is suitably amplified and used to modulate the intensity of a cathode ray tube (CRT) which is scanned in synchronism with the electron beam and, thus, a SEM image is formed. At the exit of the head amplifier the video signal is normally proportional to the number of electrons recorded.
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