Image Adaptive Contrast Enhancement for Low-illumination Lane Lines Based on Improved Retinex and Guided Filter

A novel enhancement method of global brightness modulation and local contrast enhancement combined with the improved fuzzy set theory is proposed for color image contrast enhancement. The proposed method consists of three stages. Firstly, putting forward nonlinear global brightness mapping model adjusts dynamic range of images for luminance componentVofHSVcolor space. Secondly, membership function is established in stages to adjust local contrast of image details nonlinearly based on fuzzy set theory. Finally, the enhanced images are transformed fromHSVcolor space intoRGBcolor space. The experiments further show that the proposed method has the shortest processing time, the highest AIC values, and the least NIQE values among the other four conventional methods. It has excellent effect, which can enhance the global brightness and local contrast, and advance visibility of low illumination images.

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Global and Adaptive Contrast Enhancement for Low Illumination Gray Images

IEEE Access ◽

10.1109/access.2019.2952545 ◽

2019 ◽

Vol 7 ◽

pp. 163395-163411

Author(s):

Canlin Li ◽

Jinhua Liu ◽

Anyi Liu ◽

Qinge Wu ◽

Lihua Bi

Keyword(s):

Contrast Enhancement ◽

Low Illumination

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Infrared and visible image fusion based on weighted variance guided filter and image contrast enhancement

Infrared Physics & Technology ◽

10.1016/j.infrared.2021.103662 ◽

2021 ◽

Vol 114 ◽

pp. 103662

Author(s):

Long Ren ◽

Zhibin Pan ◽

Jianzhong Cao ◽

Jiawen Liao ◽

Yang Wang

Keyword(s):

Image Fusion ◽

Contrast Enhancement ◽

Image Contrast ◽

Guided Filter ◽

Visible Image ◽

Image Contrast Enhancement

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An Energy Analyser for Contrast Enhancement in STEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100052183 ◽

1974 ◽

Vol 32 ◽

pp. 434-435

Author(s):

H.T. Pearce-Percy

Keyword(s):

Contrast Enhancement ◽

Bending Angle ◽

Magnetic Sector ◽

Conventional Design ◽

Bending Radius ◽

Sector Type

Recently an energy analyser of the uniform magnetic sector type has been installd in a 100KV microscope. This microscope can be used in the STEM mode. The sector is of conventional design (Fig. 1). The bending angle was chosen to be 90° for ease of construction. The bending radius (ρ) is 20 cm. and the object and image distances are 42.5 cm. and 30.0 cm. respectively.

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Utility of Colour Doppler Contrast Enhancement in Diagnosis of Soft Tissue Tumour

European Journal of Ultrasound ◽

10.1016/s0929-8266(97)87273-4 ◽

1997 ◽

Vol 6 ◽

pp. S38

Author(s):

F Nemore

Keyword(s):

Soft Tissue ◽

Contrast Enhancement ◽

Soft Tissue Tumour ◽

Colour Doppler ◽

Tissue Tumour

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Color flow Doppler, power Doppler or contrast enhancement in transcranial duplex somography of intracranial aneurysms? B. Griewing1, J. Piek2, L. Motsch1, Ch. Doherty1, Ch. Kessler1. 1Department of Neurology; 2Department of Neurosurgery, EMA University, Greifswald Germany

European Journal of Ultrasound ◽

10.1016/s0929-8266(97)90113-0 ◽

1997 ◽

Vol 5 ◽

pp. 47

Keyword(s):

Contrast Enhancement ◽

Intracranial Aneurysms ◽

Power Doppler ◽

Color Flow ◽

Doppler Power

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Positive correlation between neovascularization degree of carotid atherosclerosis determined by contrast-enhanced ultrasound and level of serum C-reactive protein

VASA ◽

10.1024/0301-1526/a000429 ◽

2015 ◽

Vol 44 (3) ◽

pp. 0187-0194 ◽

Cited By ~ 6

Author(s):

Xiaoni Chang ◽

Jun Feng ◽

Litao Ruan ◽

Jing Shang ◽

Yanqiu Yang ◽

...

Keyword(s):

Contrast Enhancement ◽

Rank Correlation ◽

Artery Stenosis ◽

Contrast Enhanced Ultrasound ◽

C Reactive Protein ◽

Protein Levels ◽

Reactive Protein ◽

Contrast Enhanced ◽

Grade 3 ◽

Axis View

Background: Neovascularization is one of the most important risk factors for unstable plaque. This study was designed to correlate plaque thickness, artery stenosis and levels of serum C-reactive protein with the degree of intraplaque enhancement determined by contrast-enhanced ultrasound. Patients and methods: Contrast-enhanced ultrasound was performed on 72 carotid atherosclerotic plaques in 48 patients. Contrast enhancement within the plaque was categorized as grade 1, 2 or 3. Maximum plaque thickness was measured in short-axis view. Carotid artery stenosis was categorized as mild, moderate or severe. Results: Plaque contrast enhancement was not associated with the degree of artery stenosis or with plaque thickness. Serum C-reactive protein levels were positively correlated with the number of new vessels in the plaque. C-reactive protein levels increased in the three groups(Grade 1: 3.72±1.79mg/L; Grade 2: 7.88±4.24 mg/L; Grade 3: 11.02±3.52 mg/L), with significant differences among them (F=10.14, P<0.01), and significant differences between each two groups (P<0.05). Spearmans rank correlation analysis showed that serum C-reactive protein levels were positively correlated with the degree of carotid plaque enhancement (Rs =0.69, P<0.01). Conclusions: The combination of C-reactive protein levels and intraplaque neovascularization detected by contrast-enhanced ultrasound may allow more accurate evaluation of plaque stability.

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