My system has 10 cameras connected to Sentry and set to send email alerts. For each of these cameras I have BI set up to detect any motion (no Zones) above 100 pixels and 5 of these cameras also have audio triggers turned on. During the last 10 days I have received
30,000 motion triggers
After passing through Sentry I received 1697 email alerts. Of these
1,178 email alerts where Sentry correctly marked in the image as a person,
518 email alerts where Sentry incorrectly marked something as a person,
46 audio alerts which Sentry does not process and passes through,
302 alerts had a small image, no person and had no Sentry outline, and
83 alerts had a large image, no person, and had no Sentry outline.
Now let me try to explain what the categories above mean. First, here is a daily summary image as returned by Sentry from one of my cameras:
Most of the blue boxes contain a person. As I understand it, BI passes one image per trigger to Sentry which processes the image and returns the coordinates of one or more boxes where it detects a person. A correctly processed image as seen in the email alert:
My first question is why is the image size reduced? The camera is 1080P, BI was instructed to send the image at 100%, but the image is scaled to contain 480 pixels. My 12MP camera (3,000 x 4,000 pixels) also gets reduced to 480 pixels vertically. Is this BI, BI's interaction with Sentry, or Sentry? The images show up in BI's clip list with the <S> icon as expected.
The images that Sentry misidentified as a person were usually a dog (especially at night) in the backyard or a car on the street:
Many of the bad email alerts contain the same scaled image but without the Sentry box outlines anything:
I am guessing that Sentry is not responding in time before BI decides to send out its email alert. Any one know if the real explanation? These images show up in BI's clip list without any Sentry icon.
Occasionally the email alert contains a full scale image (1080 or 3000 pixels vertically). When this happens there is never a box outlined by Sentry and only one of the 83 images happens contained a person:
So my third question is why the occasional full size image? My guess is that Sentry never responded. Even more curious is the this image does not show up at all in BI's clip list. The nearest clips are more than a minute earlier or later.
Overall I am happy with Sentry. It is much better than attempting to set up triggers that filter out clouds, cars, and wind motion.
My only real concern is: why all the alert images with no Sentry processing. It is manageable now but I am afraid it is a symptom of Sentry getting overloaded and possibly getting much worse in the future. This afternoon, over a period of 70 minutes, I had a sequence of 140 alerts returned with no persons and no Sentry boxes outlining anything.
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Dean
30,000 motion triggers
After passing through Sentry I received 1697 email alerts. Of these
1,178 email alerts where Sentry correctly marked in the image as a person,
518 email alerts where Sentry incorrectly marked something as a person,
46 audio alerts which Sentry does not process and passes through,
302 alerts had a small image, no person and had no Sentry outline, and
83 alerts had a large image, no person, and had no Sentry outline.
Now let me try to explain what the categories above mean. First, here is a daily summary image as returned by Sentry from one of my cameras:
Most of the blue boxes contain a person. As I understand it, BI passes one image per trigger to Sentry which processes the image and returns the coordinates of one or more boxes where it detects a person. A correctly processed image as seen in the email alert:
My first question is why is the image size reduced? The camera is 1080P, BI was instructed to send the image at 100%, but the image is scaled to contain 480 pixels. My 12MP camera (3,000 x 4,000 pixels) also gets reduced to 480 pixels vertically. Is this BI, BI's interaction with Sentry, or Sentry? The images show up in BI's clip list with the <S> icon as expected.
The images that Sentry misidentified as a person were usually a dog (especially at night) in the backyard or a car on the street:
Many of the bad email alerts contain the same scaled image but without the Sentry box outlines anything:
I am guessing that Sentry is not responding in time before BI decides to send out its email alert. Any one know if the real explanation? These images show up in BI's clip list without any Sentry icon.
Occasionally the email alert contains a full scale image (1080 or 3000 pixels vertically). When this happens there is never a box outlined by Sentry and only one of the 83 images happens contained a person:
So my third question is why the occasional full size image? My guess is that Sentry never responded. Even more curious is the this image does not show up at all in BI's clip list. The nearest clips are more than a minute earlier or later.
Overall I am happy with Sentry. It is much better than attempting to set up triggers that filter out clouds, cars, and wind motion.
My only real concern is: why all the alert images with no Sentry processing. It is manageable now but I am afraid it is a symptom of Sentry getting overloaded and possibly getting much worse in the future. This afternoon, over a period of 70 minutes, I had a sequence of 140 alerts returned with no persons and no Sentry boxes outlining anything.
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Dean
