2021
DOI: 10.1016/j.catena.2021.105274
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Calibration methods for measuring the color of moist soils with digital cameras

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Cited by 17 publications
(5 citation statements)
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“…In the future, the results can be obtained using other instruments, including in the field. Although modern instruments for soil colour evaluation (spectrophotometers, spectroradiometers, and photocolourimeters) are used [10,13], digital devices (cameras) [5,8] and flatbed scanners are more accessible to researchers [6,45,46]. In this case, a constant artificial light source is used, or the photograph is taken in natural light, but using calibration scales.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…In the future, the results can be obtained using other instruments, including in the field. Although modern instruments for soil colour evaluation (spectrophotometers, spectroradiometers, and photocolourimeters) are used [10,13], digital devices (cameras) [5,8] and flatbed scanners are more accessible to researchers [6,45,46]. In this case, a constant artificial light source is used, or the photograph is taken in natural light, but using calibration scales.…”
Section: Resultsmentioning
confidence: 99%
“…The colour of objects is key for the detection of boundary ramparts according to these data. The soil colour is a useful integral indicator, as it is determined by the complex of the results of pedogenesis, such as organic matter, carbonates, clay minerals, quartz oxides of iron, manganese, and water-soluble salts [5][6][7][8][9]. The use of colour as a deciphering feature was based on ground level and laboratory research.…”
Section: Introductionmentioning
confidence: 99%
“…Computer vision and soil images can be used to estimate soil moisture [2][3][4][5]. Under the same soil texture and fertility, the Gray value of soil surface image [6], soil apparent electrical conductivity (ECa) [7], color parameters [8,9], and soil mechanical resistance (MR) [10] can be used for data fusion to rapid estimate surface soil moisture.…”
Section: Introductionmentioning
confidence: 99%
“…Drawing upon the principle of the remote sensing technique, the image-based methods have been proposed and increasingly applied to measure soil moisture content [ 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 ].The image-based technique commonly employs an ordinary digital camera to capture soil sample, and the moisture content is derived from soil color using the pre-established calibration curve. It is obvious that the calibration relationship between soil moisture content and its color is the key for employing the image-based technique.…”
Section: Introductionmentioning
confidence: 99%
“…Kim et al [ 31 ] developed a water content estimation equation using soil color and suggested a calibration method for field application of this equation to predict soil water content with unmanned aerial vehicle (UAV) images. Besides, Kirillova et al [ 32 ] investigated calibration methods for measuring the color of moist soils with digital cameras and showed that a decrease in soil moisture leads to a significant increase in lightness and yellowness.…”
Section: Introductionmentioning
confidence: 99%