Development of an image capturing system for the reproduction of high-fidelity color

Ejaz, Tahseen; Shoichi, Yokoi; Horiuchi, Tomohiro; Yokota, Tetsuya; Takaya, Masanori; Ohashi, Gosuke; Shimodaira, Yoshifumi

doi:10.1117/12.588036

Cited by 5 publications

(4 citation statements)

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“…[2] which according to the authors gives average ΔE = 1.86 and the camera presented in Ref. [1] (ΔE between 1.05 and 5.5), the increase of accuracy of the XYZ camera presented in this paper is significant. The quality of the image acquired by the presented camera system is characterized by its color fidelity.…”

Section: Resultsmentioning

confidence: 93%

“…Commercially available digital cameras usually produce devicedependent color outputs (RGB, sRGB, AdobeRGB etc.). In the case of applications that require ultra high quality of the visual information, device-independent color data is needed [1]- [3]. The target of this research is the ability to develop a relatively inexpensive camera system with outstanding color acquisition performance.…”

Section: Introductionmentioning

confidence: 99%

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Development of an XYZ Digital Camera with Embedded Color Calibration System for Accurate Color Acquisition

Kretkowski

Jabłoński

Shimodaira

2010

IEICE Trans. Inf. & Syst.

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SUMMARYAcquisition of accurate colors is important in the modern era of widespread exchange of electronic multimedia. The variety of device-dependent color spaces causes troubles with accurate color reproduction. In this paper we present the outlines of accomplished digital camera system with device-independent output formed from tristimulus XYZ values. The outstanding accuracy and fidelity of acquired color is achieved in our system by employing an embedded color calibration system based on emissive device generating reference calibration colors with user-defined spectral distribution and chromaticity coordinates. The system was tested by calibrating the camera using 24 reference colors spectrally reproduced from 24 color patches of the Macbeth Chart. The average color difference (CIEDE2000) has been found to be ΔE = 0.83, which is an outstanding result compared to commercially available digital cameras.

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Section: Resultsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Development of an XYZ Digital Camera with Embedded Color Calibration System for Accurate Color Acquisition

Kretkowski

Jabłoński

Shimodaira

2010

IEICE Trans. Inf. & Syst.

Self Cite

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“…For a colorimeter based on color camera, conversion between RGB and XYZ is needed. The conversion can be expressed as: [5]…”

Section: Methods and Simulationmentioning

confidence: 99%

19.4: Pixel‐Level Color Measurement Used for MicroLED Inspection Based on Imaging Spectrometer

Luo

Hong

Zheng

et al. 2021

Symp Digest of Tech Papers

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With the development of MicroLED technology, MicroLED displays show attractive potential because of high brightness, high efficiency, low energy consumption and long lifetime. However, it's difficult to deal with MicroLED displays' defect inspection and color measurement because MicroLED displays usually contain millions of pixels which emit light separately. In this paper, pixel‐level color measurement based on imaging spectrometer is introduced which can be used for MicroLED inspection. The imaging spectrometer offers high color measurement accuracy under different conditions including luminance, spectral shape, bandwidth. Compared with colorimeter based on color camera, the imaging spectrometer offers better accuracy and robustness.

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“…However, it's difficult to deal with wide color gamut display measurement because wide color gamut display usually consists of light emitting units with narrow spectral bandwidth. Current color measurement methods such as color cameras, XYZ filter cameras, spectrometers have limitations in measurement accuracy, efficiency and processing difficulty [3] [4]. Color camera can offer the whole color information of a display, but the accuracy is usually not enough.…”

Section: Introductionmentioning

confidence: 99%

16.4: Bandwidth effect correction used for wide color gamut display measurement

Luo

Yin

Hong

et al. 2022

Symp Digest of Tech Papers

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With the development of display technology, several new displays have attracted much attention such as OLED display, QLED display, Laser display and Mini/MicroLED display. Displays with high brightness, wide color gamut, high efficiency and long lifetime are our ultimate goal. Defect inspections and color measurements are important for us to evaluate display quality. To obtain wide color gamut, we usually use narrow spectral bandwidth light source. However, it's not easy for traditional color camera or filter camera to measure narrow bandwidth light source because the accuracy is limited. In this paper, we simulate color measurement accuracy by color camera and filter camera. We analyze the influence of bandwidth effect on the color measurement and carry out bandwidth effect correction method. With the correction, the measurement accuracy improves obviously. In addition, different displays with different spectral bandwidth have been measured to validate the corrections. The results show significant improvement in color measurement accuracy. Our bandwidth effect correction can be used for wide color gamut display measurement.

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Development of an image capturing system for the reproduction of high-fidelity color

Cited by 5 publications

References 0 publications

Development of an XYZ Digital Camera with Embedded Color Calibration System for Accurate Color Acquisition

Development of an XYZ Digital Camera with Embedded Color Calibration System for Accurate Color Acquisition

19.4: Pixel‐Level Color Measurement Used for MicroLED Inspection Based on Imaging Spectrometer

16.4: Bandwidth effect correction used for wide color gamut display measurement

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