Study of Various Noise Removal Techniques

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Dr Govind N Sarage


Noise is an important factor that influences image quality which is mainly produced in the processes of image acquirement and transmission. In image processing, noise reduction and restoration of image is expected to improve the qualitative inspection of an image and the performance criteria of quantitative image analysis techniques. Digital image is inclined to a variety of noise which affects the quality of image. The main purpose of de-noising the image is to restore the detail of original image as much as possible. The criteria of the noise removal problem depends on the noise type by which the image is corrupting .In the field of reducing the image noise several type of linear and non linear filtering techniques have been proposed . Different approaches for reduction of noise and image enhancement have been considered, each of which has their own limitation and advantages.In this paper, light is thrown on some important type of noise and a comparative analysis of noise removal techniques is done.

Keywords: noise, linear, correlation, filtering, signal.


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