## 3 Measurement Results and Discussion
### Summer Season Experiments
#### 3.1.3 Analysis Results and Discussion  
For more detailed analysis, the objects in the images were classified into four structures: \"sky\", \"plants\", \"ground\", and the other remaining structures such as buildings, referred to as \"buildings\". An example of the pseudo color-coded classification is shown in Figure 9. The data obtained from directly looking at the sun in the sky are not measurable due to its high radiation intensity; thus, they were omitted from these classifications. From the results \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Location** & **Date** & \begin{tabular}{c} **Temperature** \\ **[\({}^{\circ}\)C]** \\ \end{tabular} & \begin{tabular}{c} **Humidity** \\ **[\%]** \\ \end{tabular} & \
\begin{tabular}{c} **Barometric Pressure** \\ **[hPa]** \\ \end{tabular} &
\begin{tabular}{c} **Starting Time of** \\ **Measurement** \\ \end{tabular} \\ \hline Ginza & 29 July 2020 & 31.2 & 68 & 999.1 & 12:00 noon \\ Daimon & 4 August 2020 & 32.8 & 63 & 1007.8 & 12:00 noon \\ Ginza & 19 August 2020 & 33.0 & 55 & 1012.3 & 12:00 noon \\ The Imperial Palace & 26 August 2020 & 34.9 & 65 & 1008.3 & 12:00 noon \\ Daimon & 27 August 2020 & 32.2 & 63 & 1008.3 & 12:00 noon \\ The Imperial Palace & 30 August 2020 & 31.8 & 64 & 1008.5 & 12:00 noon \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Environmental conditions of measurement location in summer experiments. Figure 8: Measured images in summer experiments at **(A)** the Imperial Palace, (**B**) Ginza, and (**C**) Daimon with (**I**) visible, (**II**) near-infrared, and (**III**) infrared camera in summer. Figure 7: Panoramic images in the measurement locations: (**A**) the Imperial Place, (**B**) Ginza, and (**C**) Daimon. of these classified images, the composition ratio of each structure at each measurement location is summarized in Figure 9. This composition ratio was calculated from the number of classification color-coded pixels before processing of the spherical projection. The heat load on the human body for each structure was calculated as explained in Section 2, and the averages of the two results measured at each location are shown in Figure 10.  
Figure 10: Calculated radiation energy to the human body in summer experiments for each location: (**A**) the Imperial Palace, (**B**) Ginza, and (**C**) Daimon. Figure 9: Structure classification at each location: (**A**) the Imperial Palace, (**B**) Ginza, and (**C**) Daimon. For the Imperial Palace, the sky occupied a large area (44.1%), while other structures and plants occupied less than 5%. Therefore, the radiation energy of plants and the buildings were much smaller than those of the ground and sky. In the far-infrared wavelengths, only the sky had a negative value. This implies that structures other than the sky were hotter than the human body. [PERSON] et al. [25] showed that wall and road had high temperature than plants, and the wall and road became the heat load to the human body. The results of the current experiments likewise showed that the structure and the ground were at a higher temperature than the human body, giving a positive heat load to the human body. Compared to the Imperial Palace, Ginza showed higher values of radiation energy for the buildings. In the far-infrared wavelengths, the negative energy value of the sky was smaller because the area of the sky had decreased (22.1%) compared to the Imperial Palace. There was a large amount of radiation energy from other structures and the ground in the visible and near-infrared wavelengths. There was no significant difference in the area of the ground between the Imperial Palace and Ginza. Therefore, the reflected light from the buildings possibly caused the energy changes in the visible and near-infrared wavelengths of the ground. In addition, far-infrared radiation energy from the ground increased despite the fact that the buildings in Ginza blocked sunlight from the sky. The radiation of far-infrared wavelengths corresponds to the energy derived from the temperature of the materials.