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Additional conditions match all kinds of requests. Conditions are always joined with logical “AND”. For instance, the “object “object of height not more than a quarter of the frame that is in the camera field of view for 5 seconds” seconds” request looks like this:
| Code Block |
|---|
{
"queryType": "zone",
"figures": [
{
"shape": [
[0.3, 0.3],
[0.7, 0.3],
[0.7, 0.7],
[0.3, 0.7]
]
}
],
"objectProperties": {
"size": {
"height": [0, 0.25]
}
},
"conditions": {
"duration": 5
}
} |
...
Search for objects abandoned in any point of the frame looks like this:
| Code Block |
|---|
{
"queryType": "zone",
"figures": [
{
"shape": [
[0, 0],
[1, 0],
[1, 1],
[0, 1]
]
}
],
"objectProperties": {
"category": ["abandoned"],
}
} |
...
For instance, to find objects that are not bigger than a quarter of the frame in height one can use this request::
| Code Block |
|---|
{
"queryType": "zone",
"figures": [
{
"shape": [
[0.3, 0.3],
[0.7, 0.3],
[0.7, 0.7],
[0.3, 0.7]
]
}
],
"objectProperties": {
"size": {
"width": [0, 1],
"height": [0, 0.25]
}
}
} |
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It sets minimum and maximum coordinates of the object color in HSV space. hue Hue is measured in degrees (from 0 to 3600 to 360), saturation and brightness – saturation and brightness – in fractions from 0 to 1from 0 to 1.
The request to get bright green objects in the zone looks like this:
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It is measured in frame rates per second – i.e. the velocity of the object moving from the left edge of the frame to the right one over 1 second is 1.
.
| Code Block |
|---|
{
"queryType": "zone",
"figures": [
{
"shape": [
[0.3, 0.3],
[0.7, 0.3],
[0.7, 0.7],
[0.3, 0.7]
]
}
],
"conditions": {
"velocity": [0.25, 1]
}
} |
...
So the request to get objects moving to the right ±45° looks like this:
:
| Code Block |
|---|
{
"queryType": "zone",
"figures": [
{
"shape": [
[0.3, 0.3],
[0.7, 0.3],
[0.7, 0.7],
[0.3, 0.7]
]
}
],
"conditions": {
"directions": [
[315, 45]
]
}
} |
Pay attention that 45° -- 315° angle covers 45° − 315° angle covers all directions except “to the right”.
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Using this condition one can make the “long presence in the zone” request::
| Code Block |
|---|
{
"queryType": "zone",
"figures": [
{
"shape": [
[0.3, 0.3],
[0.7, 0.3],
[0.7, 0.7],
[0.3, 0.7]
]
}
],
"conditions": {
"duration": 5
}
} |
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