MR Image Contrast Enhancement by Wavelet-based Contourlet Transform
The contrast of magnetic resonance (MR) image local regions is low, edges blurred and image contains noise. To improve image contrast of local regions and solve the problem of noise enlarging, an MR image contrast enhancement algorithm by wavelet-based contourlet transform (WBCT) was put forward in...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Bulgarian Academy of Sciences
2016-06-01
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| Series: | International Journal Bioautomation |
| Subjects: | |
| Online Access: | http://www.biomed.bas.bg/bioautomation/2016/vol_20.2/files/20.2_09.pdf |
| _version_ | 1811213095486357504 |
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| author | Zhongliang Luo Yingbiao Jia |
| author_facet | Zhongliang Luo Yingbiao Jia |
| author_sort | Zhongliang Luo |
| collection | DOAJ |
| description | The contrast of magnetic resonance (MR) image local regions is low, edges blurred and image contains noise. To improve image contrast of local regions and solve the problem of noise enlarging, an MR image contrast enhancement algorithm by wavelet-based contourlet transform (WBCT) was put forward in this paper. Firstly, MR images were decomposed into low-pass and a series of high-pass sub-band images by WBCT, then algorithm adjustment coefficients of sub-band images were used through an enhancement operator. Finally, the contrast enhanced image was obtained by inverse WBCT. Compared with several image enhancement algorithms, the experimental results demonstrated that the ability of the proposed method in highlighting MR image's subtle features and preserving edges while suppressing noise. The contrast enhanced image had better visual effect, which is beneficial to doctor for diagnosing diseases. |
| first_indexed | 2024-04-12T05:41:23Z |
| format | Article |
| id | doaj.art-b5e1c2ad39ed40488478a67334dd8b3c |
| institution | Directory Open Access Journal |
| issn | 1314-1902 1314-2321 |
| language | English |
| last_indexed | 2024-04-12T05:41:23Z |
| publishDate | 2016-06-01 |
| publisher | Bulgarian Academy of Sciences |
| record_format | Article |
| series | International Journal Bioautomation |
| spelling | doaj.art-b5e1c2ad39ed40488478a67334dd8b3c2022-12-22T03:45:39ZengBulgarian Academy of SciencesInternational Journal Bioautomation1314-19021314-23212016-06-01202265278MR Image Contrast Enhancement by Wavelet-based Contourlet TransformZhongliang Luo0Yingbiao JiaSchool of Information Science and Engineering, Shaoguang University, Shaoguan 512005, ChinaThe contrast of magnetic resonance (MR) image local regions is low, edges blurred and image contains noise. To improve image contrast of local regions and solve the problem of noise enlarging, an MR image contrast enhancement algorithm by wavelet-based contourlet transform (WBCT) was put forward in this paper. Firstly, MR images were decomposed into low-pass and a series of high-pass sub-band images by WBCT, then algorithm adjustment coefficients of sub-band images were used through an enhancement operator. Finally, the contrast enhanced image was obtained by inverse WBCT. Compared with several image enhancement algorithms, the experimental results demonstrated that the ability of the proposed method in highlighting MR image's subtle features and preserving edges while suppressing noise. The contrast enhanced image had better visual effect, which is beneficial to doctor for diagnosing diseases.http://www.biomed.bas.bg/bioautomation/2016/vol_20.2/files/20.2_09.pdfImage contrast enhancementWavelet-based contourlet transformMagnetic resonance imageNonlinear |
| spellingShingle | Zhongliang Luo Yingbiao Jia MR Image Contrast Enhancement by Wavelet-based Contourlet Transform International Journal Bioautomation Image contrast enhancement Wavelet-based contourlet transform Magnetic resonance image Nonlinear |
| title | MR Image Contrast Enhancement by Wavelet-based Contourlet Transform |
| title_full | MR Image Contrast Enhancement by Wavelet-based Contourlet Transform |
| title_fullStr | MR Image Contrast Enhancement by Wavelet-based Contourlet Transform |
| title_full_unstemmed | MR Image Contrast Enhancement by Wavelet-based Contourlet Transform |
| title_short | MR Image Contrast Enhancement by Wavelet-based Contourlet Transform |
| title_sort | mr image contrast enhancement by wavelet based contourlet transform |
| topic | Image contrast enhancement Wavelet-based contourlet transform Magnetic resonance image Nonlinear |
| url | http://www.biomed.bas.bg/bioautomation/2016/vol_20.2/files/20.2_09.pdf |
| work_keys_str_mv | AT zhongliangluo mrimagecontrastenhancementbywaveletbasedcontourlettransform AT yingbiaojia mrimagecontrastenhancementbywaveletbasedcontourlettransform |