Sentry Person and loitering recognition, Vehicle detection & identification, + Price increase

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How much are you all currently paying monthly?
 

fenderman

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Interesting! I've never heard of Amazon Rekognition. Amazon Rekognition – Pricing - AWS
First 1 million images processed per month $0.001 per image.
I wonder if Sentry simply uses their backbone.
No, sentry uses their own AI/machine learning. Users have been asking the developer to integrate Rekognition for a long time before v5 was even released - there are lots of posts about it. If you have your motion detection set to very sensitive so as not to miss motion events you can have several hundred triggers per camera per day. The .001 adds up. Also note that while initially BI sent only one image per trigger to sentry, more than one is now used.
 
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VinAU

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No, sentry uses their own AI/machine learning. Users have been asking the developer to integrate Rekognition for a long time before v5 was even released - there are lots of posts about it. If you have your motion detection set to very sensitive so as not to miss motion events you can have several hundred triggers per camera per day. The .001 adds up. Also note that while initially BI sent only one image per trigger to sentry, more than one is now used.
I don’t think they are analysing multiple images at the moment. I have the latest of everything BI and sentry and sentry is looking at a single imagine.

The problem with this approach whether it’s a single or multiple images at the beginning of the activity is that, if someone triggers the camera and then after several seconds they enter the frame then we will never know about it.

My idea is to make BI dump a frame to an image file every few seconds and then have it analysed. Yes it could add up but everything in life comes at a cost.


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fenderman

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I don’t think they are analysing multiple images at the moment. I have the latest of everything BI and sentry and sentry is looking at a single imagine.

The problem with this approach whether it’s a single or multiple images at the beginning of the activity is that, if someone triggers the camera and then after several seconds they enter the frame then we will never know about it.

My idea is to make BI dump a frame to an image file every few seconds and then have it analysed. Yes it could add up but everything in life comes at a cost.


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How do you know how many images are being sent to sentry? Did you analyse the data being sent? Your issue would be present even with multiple images being sent if they are close in time. What they really need to do is have BI only send the portion of the image where a trigger occurs. This will save bandwidth and processing time.
 

VinAU

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How do you know how many images are being sent to sentry? Did you analyse the data being sent? Your issue would be present even with multiple images being sent if they are close in time. What they really need to do is have BI only send the portion of the image where a trigger occurs. This will save bandwidth and processing time.
It’s quite obvious, it takes about 7 seconds for the image to be analysed. And the image that comes back is smaller than the images I am including in my email alerts.

I started questioning them on this a while back because the window of detection is very small and can easily be circumvented.

I have worked around some of the risk by having multiple cameras and all very sensitive so if people enter that area they will be detected eventually.

And yes my issue would be present even with multiple images. Hence why I want to send an image every few seconds. I think I could use nodered to send an image and see if there is an known person in the image. If so then slow down the rate of images being sent.


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fenderman

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It’s quite obvious, it takes about 7 seconds for the image to be analysed. And the image that comes back is smaller than the images I am including in my email alerts.

I started questioning them on this a while back because the window of detection is very small and can easily be circumvented.

I have worked around some of the risk by having multiple cameras and all very sensitive so if people enter that area they will be detected eventually.

And yes my issue would be present even with multiple images. Hence why I want to send an image every few seconds. I think I could use nodered to send an image and see if there is an known person in the image. If so then slow down the rate of images being sent.


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How is it obvious? How do you know if its a single image of say 3 images one second apart? I dont dispute that there are better ways to do it with more data or a local install but that doesnt mean only a single image is sent.
 

VinAU

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How is it obvious? How do you know if its a single image of say 3 images one second apart? I dont dispute that there are better ways to do it with more data or a local install but that doesnt mean only a single image is sent.
First I think the documentation says so.

But then when I get email alerts i get a pre motion image and then another 3 images one every second. The first of the three images is the trigger image, if I manage to avoid being in that one Sentry won’t see me, I have tested it.

This image also has a 7 seconds time difference to the next one which should be only 1 second since BI is configured to get 3 images one second from each other. And it also comes back much smaller than the others.

Last but not least sentry support has told me they only take the first image. They also said they were working on taking more than one but didn’t give me date as to when this would be ready.


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fenderman

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First I think the documentation says so.

But then when I get email alerts i get a pre motion image and then another 3 images one every second. The first of the three images is the trigger image, if I manage to avoid being in that one Sentry won’t see me, I have tested it.

This image also has a 7 seconds time difference to the next one which should be only 1 second since BI is configured to get 3 images one second from each other. And it also comes back much smaller than the others.

Last but not least sentry support has told me they only take the first image. They also said they were working on taking more than one but didn’t give me date as to when this would be ready.


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What documentation? The have openly said in a post on this forum that originally it was one photo, now it is more than that. IF sentry actually told you otherwise recently, why did you not mention it in your initial post? If you mean that the two sentry alerts are 7 seconds apart, that is meaningless, they are simply suppressing multiple alerts of the same trigger.
I understand you issue with their method. But that does not indicate that only a single image is sent.
 

VinAU

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What documentation? The have openly said in a post on this forum that originally it was one photo, now it is more than that. IF sentry actually told you otherwise recently, why did you not mention it in your initial post? If you mean that the two sentry alerts are 7 seconds apart, that is meaningless, they are simply suppressing multiple alerts of the same trigger.
I understand you issue with their method. But that does not indicate that only a single image is sent.
You misunderstood me, the images in the email a single email are 7 seconds apart. They should be a second apart, their time stamp show it clearly. It takes sentry 7 seconds on average to respond so that BI can continue.

They have said to me they would analyse more images but I haven’t seen this released yet.


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fenderman

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You misunderstood me, the images in the email a single email are 7 seconds apart. They should be a second apart, their time stamp show it clearly. It takes sentry 7 seconds on average to respond so that BI can continue.

They have said to me they would analyse more images but I haven’t seen this released yet.


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The email alerts you receive dont come from sentry.
 

ljw2k

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No not every Alert just a 24hr report with all the alerts in that 24hrs with images
 

VinAU

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The email alerts you receive dont come from sentry.
I didn't say I was getting email alerts from sentry, BI sends the image to it for processing and then sentry responds to it and only after this BI makes a decision to alert or not. The email comes from BI using the email server I set it up to use.
 

fenderman

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I didn't say I was getting email alerts from sentry, BI sends the image to it for processing and then sentry responds to it and only after this BI makes a decision to alert or not. The email comes from BI using the email server I set it up to use.
Exactly, so how does that tell you how many images is sent to sentry. The 7 seconds and timestamps are irrelevant.
 

VinAU

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Exactly, so how does that tell you how many images is sent to sentry. The 7 seconds and timestamps are irrelevant.
I can only be a certain as the information I have gathered from testing and reading, including what they have told me. I would put money on the fact they dont analyse more than on image right now.

We should get Sam from sentry to confirm this. @varghesesa can you please clarify this? @SentryAI
 

fenderman

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I can only be a certain as the information I have gathered from testing and reading, including what they have told me. I would put money on the fact they dont analyse more than on image right now.

We should get Sam from sentry to confirm this. @varghesesa can you please clarify this? @SentryAI
You have not performed a single test that would indicate there is only one image sent.
 

fenderman

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Here is your confirmation. As I indicated earlier, they have already confirmed they are taking more than one image.
 

VinAU

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You have not performed a single test that would indicate there is only one image sent.
And you know that because you have been here with me when I was testing, come on!

If I trigger the camera and then enter the frame a second after then I am missed, so if I send a football in then I walk in the frame I get no sentry notification. I have tested this extensively to find when alerts would be missed. Hence why I have been looking at alternatives.
 
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