Design and realization of optimal color filters for multi-illuminant color correction

AbstractLightfast color filters (intensively and brightly colored) can be easily produced by dying optical plastics with the surface plasmon resonance (SPR) of metal nanoparticles such as silver and gold. Here, color filters based on silver nanoparticles embedded in amorphous polystyrene have been prepared by dissolving and thermally decomposing (1,5-cyclooctadiene)(hexafluoro-acetylacetonate)silver(I) in amorphous polystyrene. The metal precursor quickly decomposes (10 s, at 180°C), leading to silver atoms that clusterize and produce a non-aggregated dispersion of silver particles in the polymer matrix. The intensity of the yellow coloration due to the SPR of nanoscopic silver can be widely tuned simply by varying the cluster numerical density in the polymer matrix that depends on the silver precursor concentration. The obtained nanocomposite films have been characterized by X-ray power diffraction, transmission electron microscopy, and UV-Vis spectroscopy.

Download Full-text

Multi-View Image Color Correction Using 3D Point Set Registration

10.1109/icip42928.2021.9506471 ◽

2021 ◽

Author(s):

Hyeonwoo Jeong ◽

Byunghyun Yoon ◽

Honggu Jeong ◽

Kang-Sun Choi

Keyword(s):

Color Correction ◽

Point Set Registration ◽

Point Set

Download Full-text

Uniformly thick tri-color filters capitalizing on an etalon with a nanostructured cavity

Applied Optics ◽

10.1364/ao.54.005866 ◽

2015 ◽

Vol 54 (18) ◽

pp. 5866 ◽

Cited By ~ 2

Author(s):

Wenjing Yue ◽

Sang-Shin Lee ◽

Eun-Soo Kim ◽

Byung-Gook Lee

Keyword(s):

Color Filters

Download Full-text

Bimodal Plasmonic Color Filters Enable Direct Optical Imaging of Ion Implantation in Thin Films

Advanced Functional Materials ◽

10.1002/adfm.202009419 ◽

2021 ◽

pp. 2009419

Author(s):

Catherine Sadatnajafi ◽

Eugeniu Balaur ◽

Brian Abbey

Keyword(s):

Thin Films ◽

Ion Implantation ◽

Optical Imaging ◽

Color Filters

Download Full-text

Color correction and adaptive contrast enhancement for underwater image enhancement

Computers & Electrical Engineering ◽

10.1016/j.compeleceng.2021.106981 ◽

2021 ◽

Vol 91 ◽

pp. 106981

Author(s):

Weidong Zhang ◽

Xipeng Pan ◽

Xiwang Xie ◽

Lingqiao Li ◽

Zimin Wang ◽

...

Keyword(s):

Contrast Enhancement ◽

Image Enhancement ◽

Color Correction ◽

Underwater Image

Download Full-text

Robust Chromatic Adaptation Based Color Correction Technology for Underwater Images

Applied Sciences ◽

10.3390/app10186392 ◽

2020 ◽

Vol 10 (18) ◽

pp. 6392

Author(s):

Xieliu Yang ◽

Chenyu Yin ◽

Ziyu Zhang ◽

Yupeng Li ◽

Wenfeng Liang ◽

...

Keyword(s):

Color Space ◽

Color Correction ◽

Test Methods ◽

Chromatic Adaptation ◽

Water Type ◽

Underwater Image ◽

Other Information ◽

Color Restoration ◽

Color Cast ◽

Imaging Conditions

Recovering correct or at least realistic colors of underwater scenes is a challenging issue for image processing due to the unknown imaging conditions including the optical water type, scene location, illumination, and camera settings. With the assumption that the illumination of the scene is uniform, a chromatic adaptation-based color correction technology is proposed in this paper to remove the color cast using a single underwater image without any other information. First, the underwater RGB image is first linearized to make its pixel values proportional to the light intensities arrived at the pixels. Second, the illumination is estimated in a uniform chromatic space based on the white-patch hypothesis. Third, the chromatic adaptation transform is implemented in the device-independent XYZ color space. Qualitative and quantitative evaluations both show that the proposed method outperforms the other test methods in terms of color restoration, especially for the images with severe color cast. The proposed method is simple yet effective and robust, which is helpful in obtaining the in-air images of underwater scenes.

Download Full-text