scholarly journals False Color Photography Effect using Hoya UV&IR Cut Filters Feature White Balance

2018 ◽  
Vol 197 ◽  
pp. 15008
Author(s):  
Setya Chendra Wibawa ◽  
Asep Bayu Dani Nandyanto ◽  
Dodik Arwin Dermawan ◽  
Alim Sumarno ◽  
Naim Rochmawati ◽  
...  
Keyword(s):  
Near Infrared ◽  
Infrared Photography ◽  
White Balance ◽  
Color Effect ◽  
Model Object ◽  
False Color ◽  
Single Lens ◽  
Color Photography

The research inspired by modification DSLR camera become False Color Photography effect. False Color Photography is a technique to give results like near-infrared. Infrared photography engages capturing invisible light to produces a striking image. The objective of this research to know the effect by change a digital single-lens reflex (D-SLR) camera to be false color. The assumption adds a filter and make minor adjustments or can modify the camera permanently by removing the hot mirror. This experiment confirms change usual hot mirror to Hoya UV&IR Cut Filter in front of sensor CMOS. The result is false color effect using feature Auto White Balance such as the color of object photography change into reddish, purplish, old effect, in a pint of fact the skin of model object seems to be smoother according to White Balance level. The implication this study to get more various effect in photography.

scholarly journals Theoretical study of solar light reflectance from vertical snow surfaces

2013 ◽  
Vol 7 (2) ◽  
pp. 657-666
Author(s):  
O. V. Nikolaeva ◽  
A. A. Kokhanovsky
Keyword(s):  
Radiative Transfer ◽  
Near Infrared ◽  
Theoretical Study ◽  
Solar Light ◽  
Reflection Function ◽  
Infrared Photography ◽  
Black Film ◽  
Light Reflectance ◽  
Vertical Inhomogeneity

Abstract. The influence of horizontal and vertical inhomogeneity of snow surfaces on solar light reflectance is studied using the radiative transfer theory (RTT). We compared 1-D RTT and 2-D RTT and found that large errors are produced if the 1-D RTT is used for the calculation of the snow reflection function (and, therefore, also in the retrievals of the snow grain radii) in 2-D measurement geometries. Such 2-D geometries are common in the procedures for the determination of the effective snow grain radii using near-infrared photography and spectroscopy of vertical snow walls. In particular, we have considered three cases for the numerical calculations: (1) the case with no black film; (2) the case with a black film at the pit's bottom; (3) the case with a black film at the pit's bottom and also at one of the vertical snow walls.

scholarly journals Visible Discrimination of Broadband Infrared Light by Dye-Enhanced Upconversion in Lanthanide-Doped Nanocrystals

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Charles G. Dupuy ◽  
Thomas L. Allen ◽  
George M. Williams ◽  
David Schut
Keyword(s):  
Near Infrared ◽  
Spectral Response ◽  
Infrared Light ◽  
Optical Antennas ◽  
Optical Antenna ◽  
Recent Application ◽  
False Color ◽  
Infrared Excitation ◽  
Peak Emission

Optical upconversion of near infrared light to visible light is an attractive way to capture the optical energy or optical information contained in low-energy photons that is otherwise lost to the human eye or to certain photodetectors and solar cells. Until the recent application of broadband absorbing optical antennas, upconversion efficiency in lanthanide-doped nanocrystals was limited by the weak, narrow atomic absorption of a handful of sensitizer elements. In this work, we extend the role of the optical antenna to provide false-color, visible discrimination between bands of infrared radiation. By pairing different optical antenna dyes to specific nanoparticle compositions, unique visible emission is associated with different bands of infrared excitation. In one material set, the peak emission was increased 10-fold, and the width of the spectral response was increased more than 10-fold.

scholarly journals Identification of Continental Wetlands Using Different Orbital Remote Sensors

Terr Plural ◽  
2021 ◽  
Vol 15 ◽  
pp. 1-25
Author(s):  
Isadora Taborda Silva ◽  
Jéssica Rabito Chaves ◽  
Helen Rezende Figueiredo ◽  
Bruno Silva Ferreira ◽  
César Claudio Cáceres Encina ◽  
...  
Keyword(s):  
Near Infrared ◽  
Spectral Band ◽  
Landsat 8 ◽  
Remote Sensors ◽  
False Color ◽  
False Color Composite ◽  
International Importance ◽  
Color Composite ◽  
Shortwave Infrared ◽  
Sentinel 2

This paper evaluates the potential of false-color composite images, from 3 different remote sensing satellites, for the identification of continental wetlands. Landsat 8, Sentinel-2 and CBERS-4 scenes from three different Ramsar sites (i.e., sites designated to be of international importance) two sites located within the Mato-Grossense Pantanal and one within the Sul-mato-grossense were used for analyses. For each site, images from both the dry and rainy seasons were analyzed using Near-Infrared (NIR), Shortwave Infrared (SWIR), and visible (VIS) bands. The results show that false-color composite images from both the Landsat 8 and the Sentinel-2 satellites, with both SWIR 2-NIR-BLUE and NIR-SWIR-RED spectral band combinations, allow the identification of wetlands.

scholarly journals Hoar crystal development and disappearance at Dome C, Antarctica: observation by near-infrared photography and passive microwave satellite

2013 ◽  
Vol 7 (1) ◽  
pp. 175-217 ◽  
Author(s):  
N. Champollion ◽  
G. Picard ◽  
L. Arnaud ◽  
E. Lefebvre ◽  
M. Fily
Keyword(s):  
Wind Speed ◽  
Satellite Data ◽  
Wind Direction ◽  
Near Infrared ◽  
Microwave Remote Sensing ◽  
Passive Microwave ◽  
Infrared Photography ◽  
Surface Mass ◽  
Prevailing Direction ◽  
Strong Winds

Abstract. Hoar crystals episodically cover the snow surface in Antarctica and affect the roughness and reflective properties of the air-snow interface. However, little is known about their evolution and the processes responsible for their development and disappearance despite a probable influence on the surface mass balance and energy budget. To investigate hoar evolution, we use continuous observations of the surface by in-situ near-infrared photography and by passive microwave remote sensing at Dome C in Antarctica. From the photography data, we retrieved a daily indicator of the presence/absence of hoar crystals using a texture analysis algorithm. The analysis of this 2-yr long time series shows that Dome C surface is covered almost half of the time by hoar. The development of hoar crystals takes a few days and seems to occur whatever the meteorological conditions. In contrast, the disappearance of hoar is rapid (a few hours) and coincident with either strong winds or with moderate winds associated with a change in wind direction from Southwest (the prevailing direction) to Southeast. From the microwave satellite data, we computed the polarisation ratio (i.e. horizontal over vertical polarised brightness temperatures), an indicator known to be sensitive to hoar in Greenland. Photography data and microwave polarisation ratio are correlated, i.e. high values of polarisation ratio which theoretically correspond to low snow density values near the surface are associated with the presence of hoar crystals in the photography data. Satellite data over nearly ten years (2002–2011) confirm that a strong decrease of the polarisation ratio (i.e. signature of hoar disappearance) is associated with an increase of wind speed or a change in wind direction from the prevailing direction. The photography data provides, in addition, evidence of interactions between hoar and snowfall. Further adding the combined influence of wind speed and wind direction results in a complex picture of the snow-atmosphere interactions in Antarctica which deserves further quantification and modelling.

scholarly journals A paintable phosphorescent bandage for postoperative tissue oxygen assessment in DIEP flap reconstruction

2020 ◽  
Vol 6 (51) ◽  
pp. eabd1061
Author(s):  
Haley Marks ◽  
Alexandra Bucknor ◽  
Emmanuel Roussakis ◽  
Nicholas Nowell ◽  
Parisa Kamali ◽  
...  
Keyword(s):  
Near Infrared ◽  
Oxygen Sensing ◽  
Standard Of Care ◽  
Strong Relationship ◽  
Diep Flap ◽  
Tissue Oxygen ◽  
Blood Oxygen Saturation ◽  
Sensing Applications ◽  
Single Lens ◽  
Tissue Defects

Flaps are common in plastic surgery to reconstruct large tissue defects in cases such as trauma or cancer. However, most tissue oximeters used for monitoring ischemia in postoperative flaps are bulky, wired devices, which hinder direct flap observation. Here, we present the results of a clinical trial using a previously untried paintable transparent phosphorescent bandage to assess the tissue’s partial pressure of oxygen (pO2). Statistical analysis revealed a strong relationship (P < 0.0001) between the rates of change of tissue oxygenation measured by the bandage and blood oxygen saturation (%stO2) readings from a standard-of-care ViOptix near-infrared spectroscopy oximeter. In addition, the oxygen-sensing bandage showed no adverse effects, proved easy handling, and yielded bright images across all skin tones with a digital single-lens reflex (DSLR) camera. This demonstrates the feasibility of using phosphorescent materials to monitor flaps postoperatively and lays the groundwork for future exploration in other tissue oxygen sensing applications.

scholarly journals PEMANFAATAN DATA SATELIT HIMAWARI 8 UNTUK MENDETEKSI SEBARAN ASAP: STUDI KASUS DI KALIMANTAN DAN SUMATERA TANGGAL 8 DAN 9 SEPTEMBER 2015

2017 ◽  
Vol 2 (2) ◽  
pp. 157
Author(s):  
Ayu Vista Wulandari ◽  
Ni Kadek Trisna Dewi ◽  
Wishnu Agum Swastiko
Keyword(s):  
Satellite Imagery ◽  
Forest Fire ◽  
Forest Fires ◽  
Near Infrared ◽  
Negative Impact ◽  
Distribution Data ◽  
Observation Data ◽  
False Color ◽  
Negative Impacts ◽  
Infrared Channel

The forest fires that occurred in the entire month of September 2015 was quite considerably disturbing many public activities in Borneo and Sumatera. The smoke which is caused by forest fire has negative impact for the surrounding environments, one of them is reducing horizontal visibility. Meteorological stations in Borneo and Sumatra recorded the lowest visibility occurred on September, 8th and 9th 2015 at average range was 100 m. Based on information of BMKG (Indonesian Agency of Meteorological, Climatological and Geophysics) noted that during the month of September 2015 there was a distribution of hotspots which indicates the occurrence of forest fire cases. This research is aimed to determine the potential of distribution of smoke by satellite imagery of Himawari 8 to reduce its negative impacts. By using this method that is by comparing the hotspot distribution data from BMKG with false color RGB image product (1 visible channel and 2 near infrared channel) along with trajectory of smoke’s distribution by utilizing application of GMSLPD SATAID. The distribution of smoke can be seen as an image with the brownish pattern which partially covered the area of Borneo and Sumatera. The result showed that the smoke’s distribution by the result of RGB imagery well-matched enough with the hotspot’s distribution data from BMKG, which the smoke almost covered most area of the western of Sumatera and center of Borneo. In this case also supported by the trajectory of smoke’s distribution which is derived from southeast-south and spread to the northwest-north in the researches area. By using the observation data from chosen meteorological stations showed a similar result with the above method. Thus, it can be assumed that by using satellite imagery of Himawari 8 is quite capable to discover smoke’s distribution caused by forest fires case. Keywords: Smoke, Satellite, Himawari 8, SATAID.

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