Image Enhancement Techniques: A Comprehensive Review
نویسنده
چکیده
Image enhancement is most crucial preprocessing step of digital image processing. It is used to enhance features of digital image in order to improve its visual appearance and to make it more suitable for autonomous machine perception. Image enhancement is subjective process of improvement and is application dependent. Apart from visible region, digital images can also be created from remaining electromagnetic spectrum like x-rays, infrared rays, gamma rays etc. The improvement of digital image can be done by removing noise, enhancing contrast and by removing blurring. In this paper, review and comparison of different existing image enhancement techniques in spatial and frequency domain have been done and conclusion will be made that in which application or condition a particular enhancement technique can be used.
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