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KMID : 0357520070300010001
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Journal of Radiological Science and Technology
2007 Volume.30 No. 1 p.1 ~ p.6
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Mixed Noise Reduction Filters for CR Images
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Min Jung-Hwan
Kim Jung-Min
Jung Hea-Won
Kim Jung-Min
Jeong Hea-Won
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Abstract
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This study is to decrease compound noise in x-ray films. This study compared Signal to noise ratio(SNR), Peak signal to noise ratio(PSNR), Mean square error(MSE) to surface of the earth. In addition, we evaluated noise elimination effect according to the kernel size of Median filter. This experiments show that some filters are useful by finding image that is near in circle image comparing circle picture with each processed picture. In noise power value, when cutoff frequency was compared with other filters of cutoff frequency. Cutoff frequency of is good and it shows good SNR and PSNR. Therefore, it can display high filter effect. As Median Filter’s Kernel size grows SNR value gets bigger, which shows better filter effect. Most pictures are distorted after filter application in medical treatment image. It is important to keep spatial resolution in most medical images. Visual estimation as well as quantitative indicators should be necessary for a better image.
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KEYWORD
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CR, Noise, SNR, PSNR, MSE
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