| I (see in Figure 21a) |
2 °C, morning, average −1 °C during the day, snowy, wind 3.6 mph |
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The behaviors of the humans include walking, running, standing, and sitting.
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The sequence was captured during a little snowfall.
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The intensity of the human is influenced by material of clothes.
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| II (see in Figure 21b) |
−2 °C, night, average −3 °C during the day, wind 2.4 mph |
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The behaviors of the humans include walking, running, standing, and sitting.
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Three or four people appear together in several frames.
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Example of this database is presented in Figure 21b.
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| III (see in Figure 21c) |
−1 °C, morning, average 3 °C during the day, sunny after rainy at dawn time, wind 4.0 mph |
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The behaviors of the humans include walking, running, standing, and sitting.
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The brightness of the human is very different compared to that of the background.
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The pixel value of the human is much higher than that of the background.
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| IV (see in Figure 21d) |
−6 °C, night, average −3 °C during the day, sunny after rainy at dawn time, wind 4.0 mph |
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The behaviors of the humans include walking, running, standing, and sitting.
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The intensity of the human is variously affected by temperature.
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If a person just appears from a building (indoors), the brightness of the person is much greater than other objects. The day when the database was captured was too cold.
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| V (see in Figure 21e) |
−2 °C, night, average −2 °C during the day, sunny, wind 4.9 mph |
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The behaviors of the humans include walking, running, standing, and sitting.
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There is a person wearing thick clothes. Therefore, the brightness of human is similar to the background because the intensity of image captured by infrared camera depends on the emission of heat.
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| VI (see in Figure 21f) |
−1 °C, morning, average 2 °C during the day, sunny, wind 2.5 mph |
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The behaviors of the humans include walking, running, standing, and sitting.
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The Halo effect is shown below the regions of humans. It is shown distinctive to the background.
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The brightness of the humans is much higher than that of background.
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| VII (see in Figure 21g) |
22 °C, indoor, average −12 °C during the day outside, no wind |
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The behaviors of the humans include walking, running, standing, and sitting.
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The brightness of an image captured indoors is brighter than that of an image captured outside.
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The reflected region is located under the human region. The size of the region is same with the human. It is influenced by the material of the floor.
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| VIII (see in Figure 21h) |
26 °C, afternoon, average 21 °C during the day, sunny, wind 1 mph |
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The behaviors of the humans include walking, sitting, and waving.
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The intensity of the humans is much lower than the background. The intensity of some background regions is also similar to that of human.
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| IX (see in Figure 21i) |
14 °C, morning, average −18 °C during the day, sunny, wind 2.4 mph |
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The behavior of humans is waving.
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There are two or four people in the sequence. Their sizes are very different.
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The intensity of the humans is higher than that of background. There is also a watering ground.
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| X (see in Figure 21j) |
28 °C, afternoon, average −23 °C during the day, sunny, wind 5 mph |
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The behavior of humans is walking.
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The sequence is captured during a hot day.
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The intensity of the image is influenced by the camera module system. Therefore, the brightness of humans is much darker than that of the background.
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There are some occluded people that can be a cause of difficulty for detection of the proposed system.
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| XI (see in Figure 21k) |
18 °C, night, average 19 °C during the day, sunny after rainfall during the daytime, wind 2 mph |
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The behaviors of the human include kicking and punching.
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The person that appeared in the sequence is wearing short sleeves.
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The intensity of the human is a little higher than that of the background.
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| XII (see in Figure 21l) |
27 °C, afternoon, average 23 °C during the day, sunny, wind 4.3 mph |
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The behavior of the humans is walking.
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There is region whose brightness is very similar to humans. Intensity of humans is reflected because of the fences. Not only the size but also intensity of the reflection is very similar to those of humans.
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The sequence is captured during a hot day.
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The intensity of the image is influenced by the camera module system. There is a slight brightness change during recording because of a large vehicle.
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| XIII (see in Figure 21m) |
27 °C, night, average 29 °C during the day, sunny after rainfall during morning, wind 2.4 mph |
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The behaviors of the humans include walking, waving, and punching.
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The intensity of the human is similar to that of the background. The detection result of the proposed method is affected by the little contrast between humans and the background.
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| XIV (see in Figure 21n) |
33 °C, afternoon, average 29 °C during the day, sunny, wind 3.5 mph |
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The behaviors of the humans include walking, running, standing, punching, and kicking.
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The sequence is captured during a heat wave.
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The humans that appeared in the sequence are wearing short sleeves.
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The brightness of the humans is darker than that of the background. There is a region whose brightness is very similar to the background. There are two crosswalks whose intensity is a little darker than the surrounding region.
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There is a slight brightness change during the recording because of a large vehicle.
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| XV (see in Figure 21o) |
30 °C, night, average 29 °C during the day, sunny, wind 2.5 mph |
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The behaviors of the human include walking, waving, kicking, and punching.
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The intensity of the human is much darker than the background. A human is shown relevant to the background region.
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There is a round iron piece in the middle of the images. There is a region whose brightness is very similar to the background. There are two crosswalks whose intensity is a little darker than the surrounding region.
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