58‐3: Invited Paper: Color Uniformity of μLED Displays: New Color Calibration Concept for Fast and Accurate Optical Testing

2021 ◽  
Vol 52 (1) ◽  
pp. 822-825
Author(s):  
Tobias Steinel ◽  
Martin Wolf
Keyword(s):  
Optical Testing ◽  
Color Calibration ◽  
Color Uniformity

The Experimental Research on Tiled Multiple Projectors Displaying Based on ICC Mechanism

2012 ◽  
Vol 262 ◽  
pp. 80-85
Author(s):  
Zhen Liu ◽  
Ming Zhu ◽  
Jian Yu
Keyword(s):  
Color Space ◽  
Calibration Method ◽  
Lookup Table ◽  
Color Management ◽  
Development Platform ◽  
Color Calibration ◽  
Color Uniformity ◽  
Table Model ◽  
Multiple Projectors ◽  
Interpretation Algorithm

The research on the color uniformity of the tiled multiple projectors display systems gets more and more attention. In this paper, taking the tiled two-projector display system as a case, the color calibration method based on ICC color management mechanism was proposed and used to achieve the color uniformity the non-overlapping projected region firstly. And the sectoring parabola interpretation algorithm was used to achieve the color uniformity of the overlapping projected region. The research content of this paper includes: ①The ICC profile of the projector based on matrix model was calculated and generated; ②The ICC profile of the projector based on 3-dimensions lookup table model was calculated and generated; ③The color-matching precision of the above two types of ICC profiles were compared by the color space conversion experiment, and the feasibility of color calibration method of the non-overlapping projected region based on ICC mechanism was verified; ④Finally, the feasibility of color calibration method of the overlapping projected region based on sectoring parabola interpretation algorithm was verified by Quest3D development platform.

Zirconia ceramic dental restorations: Laser machining and optical testing

2009 ◽  
Author(s):  
Duncan P. Hand ◽  
Jonathan P. Parry ◽  
Mateusz Matysiak ◽  
Fraser C. Dear ◽  
J Graham Crowder ◽  
...  
Keyword(s):  
Zirconia Ceramic ◽  
Laser Machining ◽  
Optical Testing ◽  
Dental Restorations

A Correspondence-Free Color Chart Design for Color Calibration

2020 ◽  
Vol 2020 (1) ◽  
pp. 100-104
Author(s):  
Hakki Can Karaimer ◽  
Rang Nguyen
Keyword(s):  
Color Space ◽  
Fixed Number ◽  
New Approach ◽  
Color Chart ◽  
Color Calibration ◽  
Space Transformation ◽  
Color Space Transformation ◽  
Chart Design ◽  
Calibration Approach

Colorimetric calibration computes the necessary color space transformation to map a camera's device-specific color space to a device-independent perceptual color space. Color calibration is most commonly performed by imaging a color rendition chart with a fixed number of color patches with known colorimetric values (e. g., CIE XYZ values). The color space transformation is estimated based on the correspondences between the camera's image and the chart's colors. We present a new approach to colorimetric calibration that does not require explicit color correspondences. Our approach computes a color space transformation by aligning the color distributions of the captured image to the known distribution of a calibration chart containing thousands of colors. We show that a histogram-based colorimetric calibration approach provides results that are onpar with the traditional patch-based method without the need to establish correspondences.

Non-destructive optical testing of the products obtained using additive manufacturing

2019 ◽  
Vol 85 (10) ◽  
pp. 76-82
Author(s):  
A. D. Ivanov ◽  
V. L. Minaev ◽  
G. N. Vishnyakov
Keyword(s):  
Additive Manufacturing ◽  
Optical Testing ◽  
Non Destructive

Practical color calibration method for multi-projectors display

2009 ◽  
Vol 29 (4) ◽  
pp. 982-986
Author(s):  
Jun ZHANG ◽  
Bang-ping WANG ◽  
Cheng YI ◽  
Xiao-feng LI ◽  
Hui LI
Keyword(s):  
Calibration Method ◽  
Color Calibration

Enhanced Color Rendering and Color Uniformity of PiG Based WLEDs by Using Red Phosphor Lens

2021 ◽  
pp. 1-1
Author(s):  
Jinxiang Chen ◽  
Zhuang Tian ◽  
Qing Wang ◽  
Jiaxin Liu ◽  
Yun Mou
Keyword(s):  
Red Phosphor ◽  
Color Uniformity ◽  
Color Rendering

scholarly journals Combination of wet fixation and drying treatments to improve dye fixation onto spray-dyed cotton fabric

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Lina Lin ◽  
Wenju Zhu ◽  
Cong Zhang ◽  
Md. Yousuf Hossain ◽  
Zubair Bin Sayed Oli ◽  
...  
Keyword(s):  
Cotton Fabric ◽  
Reactive Dye ◽  
Fixation Time ◽  
Drying Process ◽  
Combined Treatments ◽  
Fixation Rate ◽  
Dyeing Process ◽  
Textile Dyeing ◽  
Color Uniformity ◽  
Four Levels

AbstractThe conventional dyeing process requires a substantial amount of auxiliaries and water, which leaches hazardous colored effluents to the environment. Herein, a newly developed sustainable spray dyeing system has been proposed for cotton fabric in the presence of reactive dyes, which has the potential to minimize the textile dyeing industries environmental impact in terms of water consumption and save significant energy. The results suggest that fresh dye solution can be mixed with an alkali solution before spray dyeing to avoid the reactive dye hydrolysis phenomenon. After that, drying at 60–100 °C, wet fixation treating for 1–6 min, and combined treatments (wet fixation + drying) were sequentially investigated and then dye fixation percentages were around 63–65%, 52–70%, and above 80%, respectively. Following this, fixation conditions were optimized using L16 orthogonal designs, including wet fixation time, temperature, dye concentration, and pH with four levels where the “larger-the-better” function was selected to maximize the dye fixation rate. Additionally, the color uniformity and wash and rubbing fastnesses were at an acceptable level when both treatments were applied. Finally, the dyes were hydrolyzed after wet fixation, and the hydrolysis percentages were enhanced after the drying process.

Utilization of Silicone Microspheres: Improving Color Uniformity and Reducing the Amount of Phosphor Used in White Light-Emitting Diodes

2013 ◽  
Vol 3 (9) ◽  
pp. 1453-1457 ◽  
Author(s):  
Young Rae Kang ◽  
Ki Hyun Kim ◽  
Wan Ho Kim ◽  
Sie-Wook Jeon ◽  
Min Suk Jang ◽  
...  
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Color Uniformity ◽  
White Light Emitting Diodes

Optimization of a merit function for the visual perception of color uniformity in spot lights

2014 ◽  
Vol 40 (3) ◽  
pp. 287-296 ◽  
Author(s):  
Anne Teupner ◽  
Krister Bergenek ◽  
Ralph Wirth ◽  
Juan Carlos Miñano ◽  
Pablo Benítez
Keyword(s):  
Visual Perception ◽  
Merit Function ◽  
Color Uniformity
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