Evaluating Histogram Equalization and Thresholding Methods for Segmentation of Rosa Damascena Flowers in Color Images

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KOHAN A.; MINAEI S.

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Journal: JOURNAL OF AGRICULTURAL MACHINERY Year:2021 | Volume:11 | Issue:1 (21) Page(s): 29-42

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Title

Evaluating Histogram Equalization and Thresholding Methods for Segmentation of Rosa Damascena Flowers in Color Images

Author(s)

KOHAN A. | MINAEI S. | Issue Writer Certificate

Keywords

Histogram equalizationQ1

Image processingQ1

Image segmentationQ2

Rosa DamascenaQ1

ThresholdingQ1

Abstract

Several Histogram equalization methods for enhancing the color images of Rosa Damascena flowers and some Thresholding methods for segmentation of the flowers were examined. Images were taken outdoors at different times of day and light conditions. A factorial experiment in the form of a Completely Randomized Design with two factors of Histogram equalization method at 8 levels and Thresholding method at 15 levels, was implemented. Histogram equalization methods included: CHE, BBHE, BHEPL-D, DQHEPL, DSIHE, RMSHE, RSIHE, and no Histogram equalization (NHE) as the control. Thresholding method levels were: Huang, Intermodes, Isodata, Li, maximum entropy, mean, minimum, moments, Otsu, percentile, Renyi‟ s entropy, Shanbhag, Yen, constant, and global basic Thresholding method. The effect of these factors on the properties of the segmented images such as the Percentage of Incorrectly Segmented Area (PISA), Percentage of Overlapping Area (POA), Percentage of Undetected Area (PUA), and Percentage of Detected Flowers (PDF) was investigated. Results of Histogram equalization analysis showed that DQHEPL and NHE have the statistically significant lowest PUA (11. 13% and 8. 32%, respectively), highest POA (89. 35% and 92. 07%, respectively), and highest PDF (61. 88% and 64. 94%, respectively). Thresholding methods had a significant effect on PISA, PUA, POA, and PDF. The highest PDF belonged to constant, minimum, and Intermodes (75. 07%, 73. 08% and 74. 30%, respectively) They also had the lowest PISA (0. 35%, 1. 29%, and 1. 85%, respectively) and PUA (33. 72%, 23. 09%, and 15. 56%, respectively). These methods had the highest POA (80. 73%, 76. 70%, and 84. 67%, respectively). Hence, they are suitable methods for segmentation of Rosa Damascena flowers in color images.

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APA: Copy

KOHAN, A., & MINAEI, S.. (2021). Evaluating Histogram Equalization and Thresholding Methods for Segmentation of Rosa Damascena Flowers in Color Images. JOURNAL OF AGRICULTURAL MACHINERY, 11(1 (21) ), 29-42. SID. https://sid.ir/paper/367775/en

Vancouver: Copy

KOHAN A., MINAEI S.. Evaluating Histogram Equalization and Thresholding Methods for Segmentation of Rosa Damascena Flowers in Color Images. JOURNAL OF AGRICULTURAL MACHINERY[Internet]. 2021;11(1 (21) ):29-42. Available from: https://sid.ir/paper/367775/en

IEEE: Copy

A. KOHAN, and S. MINAEI, “Evaluating Histogram Equalization and Thresholding Methods for Segmentation of Rosa Damascena Flowers in Color Images,” JOURNAL OF AGRICULTURAL MACHINERY, vol. 11, no. 1 (21) , pp. 29–42, 2021, [Online]. Available: https://sid.ir/paper/367775/en

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