Study of Noise Removal Techniques for Digital Images

Study of Noise Removal Techniques for Digital Images

Punyaban Patel (Chhatrapati Shivaji Institute of Technology, India), Bibekananda Jena (Purushottam Institute of Engineering and Technology, India), Bibhudatta Sahoo (National Institute of Technology Rourkela, India), Pritam Patel (National Institute of Technology Agartala, India) and Banshidhar Majhi (National Institute of Technology Rourkela, India)
DOI: 10.4018/978-1-4666-9685-3.ch003
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Abstract

Images very often get contaminated by different types of noise like impulse noise, Gaussian noise, spackle noise etc. due to malfunctioning of camera sensors during acquisition or transmission using the channel. The noise in the channel affects processing of images in various ways. Hence, the image has to be restored by applying filtration process before the high level image processing. In general the restoration techniques for images are based up on the mathematical and the statistical models of image degradation. Denoising and deblurring are used to recover the image from degraded observations. The researchers have proposed verity of linear and non-linear filters for removal of noise from images. The filtering technique has been used to remove noisy pixels, without changing the uncorrupted pixel values. This chapter presents the metrics used for measurement of noise, and the various schemes for removing of noise from the images.
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Types Of Image

Image can be classified based on many criteria (Sridhar, 2011) as shown in Figure 1.

Figure 1.

Classification of images

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