Information processing apparatus, information processing method, program, and information processing system
Vegetation change information properly indicating a time series change of a vegetation state can be generated. To this end, a data group including vegetation data of multiple time points respectively associated with ratio information which is a component ratio of ambient light is an object to be processed. This device includes an extraction section that extracts, from the data group, vegetation data for use by using ratio information, and a generation section that generates vegetation change information indicating a time series change of a vegetation state by using the vegetation data extracted by the extraction section. By use of ratio information, vegetation data obtained under similar ambient light conditions can be collected.
1. An information processing apparatus comprising:
a memory storing program code; and
a processor configured to execute the program code to perform operations comprising:
calculating vegetation data of multiple time points,
calculating ratio information, the ratio information being based upon a ratio of detected direct light to detected scattered light, or a ratio of detected total sunlight to detected scattered light,
determining extracted vegetation data from the vegetation data on a basis of the ratio information,
generating vegetation change information indicating a time series change of the vegetation data using the extracted vegetation data, and
outputting the vegetation change information.
2. The information processing apparatus according to claim 1 , wherein
determining the extracted vegetation data comprises excluding portions of the vegetation data where the ratio information is below a predetermined threshold.
3. The information processing apparatus according to claim 1 , wherein
determining the extracted vegetation data comprises excluding portions of the vegetation data where the ratio information is below a first predetermined threshold and above a second predetermined threshold.
4. The information processing apparatus according to claim 1 , wherein the operations further comprise:
variably setting an extraction condition for determining the extracted vegetation data.
5. The information processing apparatus according to claim 2 , wherein the operations further comprise:
determining a fixed ratio based upon the ratio information of the vegetation data that is not excluded in determining the extracted vegetation data.
6. The information processing apparatus according to claim 1 , wherein the operations further comprise:
obtaining an NDVI value as the vegetation data.
7. The information processing apparatus according to claim 1 , wherein
calculating the ratio information comprises using detection values obtained by an ambient light sensor including a first light reception section on which a light shielding body casts a shadow and a second light reception section which does not come under an influence of the light shielding body, the detection values being obtained at the respective light reception sections.
8. An information processing method comprising:
calculating vegetation data of multiple time points;
calculating ratio information, the ratio information being based upon a ratio of detected direct light to detected scattered light, or a ratio of detected total sunlight to detected scattered light;
determining extracted vegetation data from the vegetation data on a basis of the ratio information,
generating vegetation change information indicating a time series change of the vegetation data using the extracted vegetation data, and
outputting the vegetation change information.
9. A non-transitory computer readable medium storing program code, the program code being executable by a processor to perform operations comprising:
calculating vegetation data of multiple time points;
calculating ratio information, the ratio information being based upon a ratio of detected direct light to detected scattered light, or a ratio of detected total sunlight to detected scattered light;
determining extracted vegetation data from the vegetation data on a basis of the ratio information,
generating vegetation change information indicating a time series change of the vegetation data using the extracted vegetation data, and
outputting the vegetation change information.
10. An information processing system comprising:
an ambient light sensor including a first light reception section on which a light shielding body casts a shadow and a second light reception section which does not come under an influence of the light shielding body;
a memory storing program code; and
a processor configured to execute the program code to perform operations comprising:
calculating vegetation data of multiple time points,
calculating ratio information, the ratio information being based upon a ratio of detected direct light to detected scattered light, or a ratio of detected total sunlight to detected scattered light,
determining extracted vegetation data from the vegetation data on a basis of the ratio information,
generating vegetation change information indicating a time series change of the vegetation data using the extracted vegetation data, and
outputting the vegetation change information.
11. The method according to claim 8 , wherein
determining the extracted vegetation data comprises excluding portions of the vegetation data where the ratio information is below a predetermined threshold.
12. The method according to claim 8 , wherein determining the extracted vegetation data comprises excluding portions of the vegetation data where the ratio information is below a first predetermined threshold and above a second predetermined threshold.
13. The non-transitory computer readable medium according to claim 9 , wherein
determining the extracted vegetation data comprises excluding portions of the vegetation data where the ratio information is below a predetermined threshold.
14. The non-transitory computer readable medium according to claim 9 , wherein determining the extracted vegetation data comprises excluding portions of the vegetation data where the ratio information is below a first predetermined threshold and above a second predetermined threshold.