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| Author | Wang, G., Wang, S., Zhang, L., Sun, F., Yan, F., & Yang, X. | ||||
| Title | A New Light Control Method with Charge Induction of Moving Target | Type | Journal Article | ||
| Year | 2019 | Publication | IEEE Sensors Journal | Abbreviated Journal | |
| Volume | 19 | Issue | 16 | Pages | |
| Keywords | Lighting; Instrumentation | ||||
| Abstract | Intelligent lamp control system has been widely studied all over the world because of its energy saving and social effect. In this paper, a new intelligent lamp control method based on charge induction for moving target is proposed. The detection model is established with the surface charge induction and verified by a luggage detection experiment. The intelligent lamp control system using the detection method is carried out. The performance of the system demonstrates that the proposed method can detect the moving target at any orientation whatever with or without occlusion and the detection distance can reach more than 3 m for the pedestrian. | ||||
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| Notes | Approved | no | |||
Call Number  |
IDA @ intern @ | Serial | 2470 | ||
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| Author | Schwarting, T., McIntire, J., Oudrari, H., & Xiong, X | ||||
| Title | JPSS-1/NOAA-20 VIIRS Day-Night Band Prelaunch Radiometric Calibration and Performance | Type | Journal Article | ||
| Year | 2019 | Publication | IEEE Transactions on Geoscience and Remote Sensing | Abbreviated Journal | |
| Volume | Issue | Pages | 1-13 | ||
| Keywords | Instrumentation | ||||
| Abstract | The Visible Infrared Imaging Radiometer Suite (VIIRS) on board the first Joint Polar-Orbiting Satellite System series 1 (JPSS-1) has a panchromatic, three gain stage, day-night band (DNB) capable of imaging the Earth under illumination conditions ranging from reflected moonlight to daytime scenes. The DNB has four charged-coupled devices (CCDs) with 32 different modes of time-delay integration and subpixel aggregation to achieve high SNR in low light conditions while maintaining roughly constant spatial resolution across scan. During the prelaunch testing phase, these 32 different aggregation modes are separately calibrated over a large dynamic range (covering seven orders of magnitude) through a series of radiometric tests designed to generate initial calibration coefficients for the sensor data record (SDR) operational algorithm, assess radiometric performance, and determine compliance with the sensor design requirements. Early in the environmental testing at the Raytheon El Segundo facility, nonlinear behavior was discovered in some DNB edge of scan aggregation modes at low signal levels. In response to this nonlinearity, the test program was altered to characterize the radiometric performance both in the baseline configuration and with a modified aggregation scheme that eliminates the modes used at the end of scan, replacing them with an unaffected adjacent mode and trading off spatial resolution for improved linearity. Presented in this paper is the radiometric performance under both sensor configurations including dynamic range, sensitivity, radiometric uncertainty, and nonlinearity along with a discussion of the potential impact to DNB on-orbit calibration and SDR performance. | ||||
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| Notes | Approved | no | |||
| Call Number |
IDA @ intern @ | Serial | 2541 | ||
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| Author | Burggraaff, O., Schmidt, N., Zamorano, J., Pauly, K., Pascual, S., Tapia, C., Spyrakos, E., & Snik, F. | ||||
| Title | Standardized spectral and radiometric calibration of consumer cameras | Type | Journal Article | ||
| Year | 2019 | Publication | Optical Express | Abbreviated Journal | |
| Volume | 27 | Issue | 14 | Pages | 19075-19101 |
| Keywords | Instrumentation | ||||
| Abstract | Consumer cameras, particularly onboard smartphones and UAVs, are now commonly used as scientific instruments. However, their data processing pipelines are not optimized for quantitative radiometry and their calibration is more complex than that of scientific cameras. The lack of a standardized calibration methodology limits the interoperability between devices and, in the ever-changing market, ultimately the lifespan of projects using them. We present a standardized methodology and database (SPECTACLE) for spectral and radiometric calibrations of consumer cameras, including linearity, bias variations, read-out noise, dark current, ISO speed and gain, flat-field, and RGB spectral response. This includes golden standard ground-truth methods and do-it-yourself methods suitable for non-experts. Applying this methodology to seven popular cameras, we found high linearity in RAW but not JPEG data, inter-pixel gain variations >400% correlated with large-scale bias and read-out noise patterns, non-trivial ISO speed normalization functions, flat-field correction factors varying by up to 2.79 over the field of view, and both similarities and differences in spectral response. Moreover, these results differed wildly between camera models, highlighting the importance of standardization and a centralized database. | ||||
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| Notes | Approved | no | |||
| Call Number |
IDA @ intern @ | Serial | 2652 | ||
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| Author | Lee, B., Lee, Y., Kim, D., & Kim, S. | ||||
| Title | Correction of Lunar Irradiation Effect and Change Detection Using Suomi-NPP Data | Type | Journal Article | ||
| Year | 2019 | Publication | Korean Journal of Remote Sensing | Abbreviated Journal | |
| Volume | 35 | Issue | 2 | Pages | 265-278 |
| Keywords | Instrumentation | ||||
| Abstract | Visible Infrared Imaging Radiometer Suite (VIIRS) Day/Night Band (DNB) data help to enable rapid emergency responses through detection of the artificial and natural disasters occurring at night. The DNB data without correction of lunar irradiance effect distributed by Korea Ocean Science Center (KOSC) has advantage for rapid change detection because of direct receiving. In this study, radiance differences according to the phase of the moon was analyzed for urban and mountain areas in Korean Peninsula using the DNB data directly receiving to KOSC. Lunar irradiance correction algorithm was proposed for the change detection. Relative correction was performed by regression analysis between the selected pixels considering the land cover classification in the reference DNB image during the new moon and the input DNB image. As a result of daily difference image analysis, the brightness value change in urban area and mountain area was ± 30 radiance and below ± 1 radiance respectively. The object based change detection was performed after the extraction of the main object of interest based on the average image of time series data in order to reduce the matching and geometric error between DNB images. The changes in brightness occurring in mountainous areas were effectively detected after the calibration of lunar irradiance effect, and it showed that the developed technology could be used for real time change detection. |
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| Notes | Approved | no | |||
| Call Number |
IDA @ intern @ | Serial | 2720 | ||
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| Author | Nievas Rosillo, M. | ||||
| Title | Absolute photometry and Night Sky Brightness with all-sky cameras | Type | Report | ||
| Year | 2013 | Publication | e-prints Complutense | Abbreviated Journal | e-prints Complutense |
| Volume | Issue | 24626 | Pages | ||
| Keywords | Instrumentation; skyglow; measurement; modeling | ||||
| Abstract | All-sky cameras have proven to be powerful tools to continuously monitoring the sky in a wide range of fields in both Astrophysics and Meteorology. In this work, we have developed a complete software pipeline to analyze the night CCD images obtained with one of such systems. This let us to study typical parameters used in Astrophysics to characterize the night sky quality, such as the Sky Brightness, the Cloud Coverage and the Atmospheric Extinction, how they evolve over the time and their variability. Using our software, we analyzed a large set of data from AstMon-OT all-sky camera at Teide Observatory. Results from this work have been applied in the support to the spanish CTA site proposal at Izaña, Tenerife and are being discussed within the CTA consortium. A comparison with data from other devices that have been used in site characterization such as the IAC80 telescope is also presented. This comparison is used to validate the results of the analysis of all-sky images. Finally, we test our software with AstMon-UCM and DSLR cameras. Some general recommendations for the use of DSLR cameras are provided. | ||||
| Address | Departamento de Astrofísica y Ciencias de la Atmosfera, Universidad Complutense de Madrid, Madrid, Spain | ||||
| Corporate Author | Thesis | Master's thesis | |||
| Publisher | Place of Publication | Madrid | Editor | ||
| Language | English | Summary Language | English | Original Title | |
| Series Editor | Series Title | e-prints Complutense | Abbreviated Series Title | ||
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| Notes | Approved | no | |||
| Call Number |
IDA @ john @ | Serial | 1437 | ||
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