Yan Hong, Rong Pang, Qing Wei, Jingming Su, Feng Zhao. Nonlinear Adaptive Enhancement Algorithm for Uneven Illumination Images[J]. Laser & Optoelectronics Progress, 2023, 60(16): 1610002
- Laser & Optoelectronics Progress
- Vol. 60, Issue 16, 1610002 (2023)
Fig. 1. Flow chart of proposed algorithm
Fig. 2. Images of illumination component. (a) (d) Original images; (b) (e) OTSU segmented images; (c) (f) images after mean segmentation
Fig. 3. Illumination component image histogram. (a) Image 1; (b) image 2
Fig. 4. One-dimensional brightness information curves of
Fig. 5. Comparison of various algorithms for scab. (a) Original images; (b) MSRCR algorithm; (c) algorithm of literature [22]; (d) CLAHE algorithm; (e) proposed algorithm
Fig. 6. Comparison of various algorithms for juniper glue rust. (a) Original images; (b) MSRCR algorithm; (c) algorithm of literature [22]; (d) CLAHE algorithm; (e) proposed algorithm
Fig. 7. Comparison of various algorithms for brown rot. (a) Original images; (b) MSRCR algorithm; (c) algorithm of literature [22]; (d) CLAHE algorithm; (e) proposed algorithm
Fig. 8. Grayscale surface diagrams of scab images. (a) (b) (c) Original images; (d) (e) (f) improved images of proposed algorithm
Fig. 9. Grayscale surface diagrams of juniper glue rust images. (a) (b) (c) Original images; (d) (e) (f) improved images of proposed algorithm
Fig. 10. Grayscale surface diagrams of brown rot images. (a) (b) (c) Original images; (d) (e) (f) improved images of proposed algorithm
Fig. 11. Average changes of evaluation indexes of different algorithms
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Table 1. Objective evaluation of scab images
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Table 2. Objective evaluation of juniper glue rust images
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Table 3. Objective evaluation of brown rot images
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