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What is Image Pre-Processing

Chapter 1
Computational Techniques for Dental Image Analysis
Pre-processing is a common name assigned for the basic operations with images at the lowest level of abstraction which aims at the improvement of image data that suppresses unwanted distortions or enhances some of the image features important for further processing.
Published in Chapter:
Digital Image Enhancement Techniques for Dental Radiographs: A Support to Clinicians
E. Priya (Sri Sairam Engineering College, India)
Copyright: © 2019 |Pages: 39
DOI: 10.4018/978-1-5225-6243-6.ch001
Abstract
Dental radiographs suffer frequently from issues such as low contrast and non-uniform illumination. The first step, indeed a significant step, is to enhance these digital images to prepare them for successful post-processing. This pre-processing stage assists to increase the contrast between the foreground that is the teeth and bone from the background regions. In this chapter, image enhancement methods based on spatial, frequency, and spatial-frequency are implemented. The dental radiographs used are available in the public database. The performance of the enhancement methods is validated using qualitative and quantitative measures. It is observed from the results that the enhancement method aids in improving dental features such as crowns, fillings, and bridges. This enables human identification and diagnostic purpose in the way it is possible to identify a variety of diseases. It also prevents the need for a remake, saving the patient from an additional treatment.
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Chapter 212
State of the Art in Writer's Off-Line Identification
Set of tools applied to the images in order to provide other improved images for other tasks.
Published in Chapter: State of the Art in Writer's Off-Line Identification; From: Encyclopedia of Artificial Intelligence
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Chapter 45
Automated Image Analysis Approaches in Histopathology
The group of techniques carried out globally on an image in order to allow more accurate analysis of the image.
Published in Chapter: Automated Image Analysis Approaches in Histopathology; From: Handbook of Research on Systems Biology Applications in Medicine
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