Getting JPG from fast moving object

[rauska2]

Hello, I have a timing question.
I want to take a JPG picture of an airplane flying at about 120 km/h during a landing.

The camera's field of view is 50m wide at the target distance.
At that time, the airplane is visible for about 1.5 seconds.
Video: 3840x2160 26 fps.

I would like BI to take a picture where the airplane is roughly in the middle of the picture, i.e. at 0.75 seconds.On the other hand, if the picture was taken at about 0.5 - 0.9 seconds, then the entire airplane would be in the picture at a speed of 100-140 km/h.

Now the settings are as follows, which most often result in two pictures. So what setting should I change so that I only get one picture?

Motion trigger make time 0.3 s
Motion End trigger if not re-triggered 0.3 s
JPEG each 0:00.9
pretrigger rec time 0 s
pretrigger play time 0 s

Video is not saved, which is the intention.

A solution could be if the option (when triggered each m:ss.s) had an option to take one picture after a selected time. But maybe by adjusting those earlier ones, that one picture would be successful.

 

[Bruce_H]

Could you setup a trip wire to trigger when the plane gets to the middle of the view, does the your camera have any sort of built in AI or trigger logic!

 

[rauska2]

Could you setup a trip wire to trigger when the plane gets to the middle of the view, does the your camera have any sort of built in AI or trigger logic!

The camera has no intelligence. How do you do that 'trip wire to trigger' ?

 

[Bruce_H]

The trip wire would be part of the Cameras AI, but you don't have any!

I would suggest that you look at the Zones & Hotspots setup on the camera setup, "Motion/Trigger", "Enable motion sensor" then click on the "Configure" button, Then select "Use zones and hot spot", click on "Edit zone map" once on that screen click on the help button and start reading about zone crossing and the hot spot zone. Come back and ask further questions if needed!

 

[CCTVCam]

You do realise that CCTV cameras don't produce pictures you can zoom into well? (A PTZ can but only because it optically zooms in before the capture not into the final picture). If you take a picture using a regular wide angle camera, then there's virtually no chance of it ever being anything more than a spec in sky zoomed out, or an unrecognisable blurry blob if zoomed into the capture. This really sounds like a job for a DSLR.,

 

[rauska2]

You do realise that CCTV cameras don't produce pictures you can zoom into well? (A PTZ can but only because it optically zooms in before the capture not into the final picture). If you take a picture using a regular wide angle camera, then there's virtually no chance of it ever being anything more than a spec in sky zoomed out, or an unrecognisable blurry blob if zoomed into the capture. This really sounds like a job for a DSLR.,

Well, I don't need to zoom in on the picture because it's enough that the plane is visible.

 

[Bruce_H]

Well, I don't need to zoom in on the picture because it's enough that the plane is visible.

I am curious as to the purpose of the pictures of the planes?

 

[CCTVCam]

That camera must be right on the runway.

 

[rauska2]

I am curious as to the purpose of the pictures of the planes?

We are required to report airport traffic volumes annually. And since the airport is unmanned, we had to come up with a way to determine the number of landings.

 

[rauska2]

That camera must be right on the runway.

Can't do it, too far to get electricity there. The pictures 1-3 work with the current settings, but I would like to get only one picture per machine

 

[rauska2]

The trip wire would be part of the Cameras AI, but you don't have any!

I would suggest that you look at the Zones & Hotspots setup on the camera setup, "Motion/Trigger", "Enable motion sensor" then click on the "Configure" button, Then select "Use zones and hot spot", click on "Edit zone map" once on that screen click on the help button and start reading about zone crossing and the hot spot zone. Come back and ask further questions if needed!

This was a good suggestion, thanks!
Now I get one picture of the plane pretty accurately in the middle of the image area.

With the following settings it worked: I made two zones A and B, about 5% overlapping .
A-zone is more sensitive than B-zone (Re-Triggers).

1. Triggering happens when the target moves A-B, i.e. in any direction.
2. Trigger method Edge-vector and time is 0.2 s 2 times in 1 sec.
3. End trigger if not re-triggered within 1.0 sec (Break-time)
4. Max trigger duration 5-6 sec. (The plane has already left the image area)
5. JPEGs When triggered and each m:ss.s setting 5-6 sec.
So the first picture is taken during the first second at 2*0.2 sec= 0.4 sec. Compare point 2.

6. All Pretrigger times are 0 sec.And no video with the trigger, because I just need a picture of the plane.

 

[Bruce_H]

This was a good suggestion, thanks!
Now I get one picture of the plane pretty accurately in the middle of the image area.

With the following settings it worked: I made two zones A and B, about 5% overlapping .
A-zone is more sensitive than B-zone (Re-Triggers).

1. Triggering happens when the target moves A-B, i.e. in any direction.
2. Trigger method Edge-vector and time is 0.2 s 2 times in 1 sec.
3. End trigger if not re-triggered within 1.0 sec (Break-time)
4. Max trigger duration 5-6 sec. (The plane has already left the image area)
5. JPEGs When triggered and each m:ss.s setting 5-6 sec.
So the first picture is taken during the first second at 2*0.2 sec= 0.4 sec. Compare point 2.

6. All Pretrigger times are 0 sec.And no video with the trigger, because I just need a picture of the plane.


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Thanks for posting back with the solution that works for you, other may find this method useful for other situations.