Vicarious Radiometric Calibration of a Multispectral Camera on Board an Unmanned Aerial System

Pozo, Susana Del; Rodríguez‐Gonzálvez, Pablo; Hernández-López, David; Felipe-García, Beatriz

doi:10.3390/rs6031918

Cited by 114 publications

(91 citation statements)

References 28 publications

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“…Regarding the radiometric distortions, they usually correspond to an increase of the signal for the case of the background noise and an attenuation for the case of the vignetting effect (Del Pozo et al, 2014). For its part, it is necessary to correct the sensor from the geometric distortion in order to perform radiometric analysis by sensor fusion.…”

Section: Radiometric Calibrationmentioning

confidence: 99%

“…Taking into account all the above and for the particular case of a 6-band multispectral camera (M ini-M CA6, Tetracam ® ), Table 1 summarizes the calibration coefficients obtained after applying the Equation 1 particularized for this sensor (Del Pozo et al, 2014). The M ini-M CA6 was radiometrically calibrated on board an unmanned aerial system (at 30 m high) through a vicarious radiometric calibration (Slater et al, 1987) by using a selfdeveloped software, M ULRACS.…”

Section: Radiometric Calibrationmentioning

confidence: 99%

See 1 more Smart Citation

Multispectral Imaging in Cultural Heritage Conservation

Pozo

Rodríguez‐Gonzálvez

Sánchez-Aparicio

et al. 2017

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABS TRACT:This paper sums up the main contribution derived from the thesis entitled "Multispectral imaging for the analysis of materials and pathologies in civil engineering, constructions and natural spaces" awarded by CIPA-ICOM OS for its connection with the preservation of Cultural Heritage. This thesis is framed within close-range remote sensing approaches by the fusion of sensors operating in the optical domain (visible to shortwave infrared spectrum). In the field of heritage preservation, multispectral imaging is a suitable technique due to its non-destructive nature and its versatility. It combines imaging and spectroscopy to analyse materials and land covers and enables the use of a variety of different geomatic sensors for this purpose. These sensors collect both spatial and spectral information for a given scenario and a specific spectral range, so that, their smaller storage units save the spectral properties of the radiation reflected by the surface of interest. The main goal of this research work is to characterise different const ruction materials as well as the main pathologies of Cultural Heritage elements by combining active and passive sensors recording data in different ranges. Conclusions about the suitability of each type of sensor and spectral range are drawn in relation to each particular case study and damage. It should be emphasised that results are not limited to images, since 3D intensity data from laser scanners can be integrated with 2D data from passive sensors obtaining high quality products due to the added value that metric brings to multispectral images.

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Section: Radiometric Calibrationmentioning

confidence: 99%

Section: Radiometric Calibrationmentioning

confidence: 99%

Multispectral Imaging in Cultural Heritage Conservation

Pozo

Rodríguez‐Gonzálvez

Sánchez-Aparicio

et al. 2017

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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“…This lowcost sensor allows versatility in data acquisition, however requires the radiometric and geometric corrections to ensure the quality of the results (Del Pozo et al, 2014). It includes a total of 6 individual sensors with filters for the visible and near infrared spectrum data acquisition.…”

Section: Equipmentmentioning

confidence: 99%

“…The Mini MCA6 was affected by two different sources errors: a background noise and a vignetting effect (Del Pozo et al, 2014). Both errors were studied under laboratory controlled conditions for each wavelength band.…”

Section: Multispectral Images Correctionsmentioning

confidence: 99%

Multi-Sensor Radiometric Study to Detect Pathologies in Historical Buildings

Pozo

Herrero-Pascual

Felipe-García

et al. 2015

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:This paper presents a comparative study with different remote sensing technologies to recognize pathologies in façades of historical buildings. Building materials deteriorate over the years due to different extrinsic and intrinsic agents, so assessing these diseases in a non-invasive way is crucial to help preserve them. Most of these buildings are extremely valuable and some of them have been declared monuments of cultural interest. In this way through close range remote sensing techniques, it is possible to study material pathologies in a rigorous way and in a short duration field campaign.For the investigation two different acquisition systems were applied, active and passive methods. The terrestrial laser scanner FARO Focus 3D was used as active sensor, working at the wavelength of 905 nm. For the case of passive sensors, a Nikon D-5000 and a 6-bands Mini-MCA multispectral camera (530-801 nm) were applied covering visible and near infrared spectral range. This analysis allows assessing the sensor, or sensors combination, suitability for pathologies detection, addressing the limitations according to the spatial and spectral resolution. Moreover, the pathology detection by unsupervised classification methods is addressed in order to evaluate the automation capability of this process.

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“…For instance, RGB sensors have improved their capabilities, including multiple-head RGB cameras and wide-angle lens [10,11]. For its part, multispectral sensors have improved their dynamic range and sensitivity [12], including geometric and radiometric calibration procedures [13,14]. In parallel, hyperspectral cameras provide more detailed information than multispectral sensors because an entire spectrum is acquired at each pixel [15].…”

mentioning

confidence: 99%

Drones—An Open Access Journal

Aguilera

Rodríguez‐Gonzálvez

2017

Drones

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Since the beginning of aviation, unmanned aerial systems have been a challenge for scientists and engineers. The first automatic airplane developed by the Wright brothers in 1916 and the drone used by the British Royal Navy for gunnery practice in 1933 serve as examples. The possibility of controlling an aircraft without a pilot has been a challenge, both from the civil and military point of view. Nowadays, the proliferation of unmanned aerial systems, popularly known as "drones", is a reality for local policy makers, regulatory bodies, mapping authorities, start-ups and consolidated companies. The number of developed drones has increased threefold from 2005 to present and, additionally, a relevant increase has been observed in the civil/commercial type of platforms, especially in 2012 and 2013 [1]. There are many uses and benefits of drones based on their own pilot system (autonomous or remotely controlled) and sensory to achieve accurate positioning and to acquire a great variety of data. By this binomial, drones are an efficient solution for the observation, inspection, measurement and monitoring of territory; ensuring better spatial, radiometric, spectral and temporal resolutions than any manned aerial vehicle and satellite.Drones have caused an unprecedented impact on society and the economy. According to recent market research [2], the global drones market revenue is worth $6,800 M United States Dollars (USD) as of 2016 and is expected to grow up to $36,900 M USD by 2022. The low-cost of the sensors integrated in aerial platforms of different designs has launched its application and proliferation more than its military origin, offering new applications and leading to more clients in the civil sector. It is in this last sector where more progress by drones is expected. For instance, new developments in robotics, computer vision and geomatic technologies, together with more research and development supported by technological centres and universities, allow the improvement of technology transfer with an important insight into new markets. While it is true that these civil-drones are still far from the systems used in military applications, studies and advances in the development of technology can offer professional systems with new, improved and promising features.In this sense, it is expected that the main advances of drones may occur in the following lines: (1) the emergence of new sensors that allow the improvement of the geometric and radiometric resolution, as well as the spectral range; (2) the evolution of new platforms that improve robustness and increase autonomy; (3) the development of software, from the navigation and communication with the platform to the processing and analysis of the images captured; (4) new applications in emerging sectors: logistics, disaster assistance, security and surveillance, health and marine science, among others.The emergence of new sensors, thanks to advances in microelectronics and nanotechnology [3-5] will be crucial in the coming years. In fact, the evolution of in...

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Vicarious Radiometric Calibration of a Multispectral Camera on Board an Unmanned Aerial System

Cited by 114 publications

References 28 publications

Multispectral Imaging in Cultural Heritage Conservation

Multispectral Imaging in Cultural Heritage Conservation

Multi-Sensor Radiometric Study to Detect Pathologies in Historical Buildings

Drones—An Open Access Journal

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