Welcome, Autel Pilots!
Join our free Autel drone community today!
Join Us

Thermal camera settings

Ranchhand

New Member
Joined
Jan 8, 2024
Messages
3
Reaction score
0
Age
62
Location
West Texas
I am trying to use the thermal camera to detect Ferrel Hogs.
The contrast is so bright I can’t determine what is what.
How do I adjust the contrast to make the live animal stand out more ?
 
I am not there to see your problem but I can make some assumptions.

My guess is this is not a contrast problem, but a temperature problem.
I see you are in Texas. Most likely the hogs are the same or similar temperature as the background (trees, grass, ground).

1705166813148.png

Above is me on the beach. You cannot easily see me because I am the same or similar temperature as the sand since this is a sunny day and the sand is solar loaded.

If I thermal-tuned the image or used isotherms it might help a little bit, but at the end of the day, I am a very similar temperature as the environment I am in and thermal imaging will struggle to find me.
 
  • Like
Reactions: Kestrel and EBERLS
Personally, if I want something to stand out, I use the Black white and RED palette. Also, I have found that early morning is best for better contrast, as the surrounding environment is still cold and not heated by the sun yet. Just after sunset is the most difficult. Oh, in case anyone was was wondering, this is the California International Marathon going by our house, as they do each year. Several thousand go by - it takes about an hour for all the runners to go by, and we are only 3 miles from the start line.
 

Attachments

  • CIM_Runners.jpg
    CIM_Runners.jpg
    657.1 KB · Views: 20
Last edited:
Agree. This is why thermal is most effective for most every task after sunset. Or at least after the sun is no longer shining on whatever things you're looking at.
 
Agree. This is why thermal is most effective for most every task after sunset. Or at least after the sun is no longer shining on whatever things you're looking at.
Yes but even more so in the morning after everything has cooled off over the night. Quite a dramatic difference actually. Much, much better in the morning.
 
  • Like
Reactions: Kestrel
I had some more time to show some examples.

I tried to thermal tune the previous image I posted.

My body in the image is different temperatures, head = 74*, body/jacket = 61*

Neither of above is the hottest or coldest in the image.
If I tune the image by adjusting the span/range to 74* for my head also doesn't help since there are large areas in the image the same temperature range. So even if I set Isotherms to show just 74* it really doesn't help as the Red Isotherm would show on various other parts of the image.

Everyone here offered great advice on flying when you will have the best temperature deltas and this holds true in thermography.

I fly public safety for my real job and we do not always get to choose the time of day and have run into your hog problem every single time we fly in the daytime to include winter, as the sun still solar loads items in the winter.


Below thermal tuned image with span set to just the temperature of my head. Too many areas of the image are the same temperature.

1705876352430.png
 
I'm assuming you have tried the other various color pallets?... and yes, once the sun warms things up it becomes a lot more difficult, regardless :-/
 
I'm assuming you have tried the other various color pallets?... and yes, once the sun warms things up it becomes a lot more difficult, regardless :-/
Color will not help.

Changing palettes will only have my head be the same color as the other areas in the image that are the same temperature.

The unaltered image actually shows me the best.

This image is an extreme to show what I think is happening for the OP. I do have many other thermal images in summer that show people better because of the various different backgrounds they are in.

Black Hot
1705965205543.png



Hot Iron


1705965249348.png
 
I am trying to use the thermal camera to detect Ferrel Hogs.
The contrast is so bright I can’t determine what is what.
How do I adjust the contrast to make the live animal stand out more ?
Which Drone/Camera?
Thermal specs?
Show some examples.
 
Color will not help.

Changing palettes will only have my head be the same color as the other areas in the image that are the same temperature.

The unaltered image actually shows me the best.

This image is an extreme to show what I think is happening for the OP. I do have many other thermal images in summer that show people better because of the various different backgrounds they are in.

Black Hot
View attachment 16953



Hot Iron


View attachment 16954
I am new to the IR drone but have used the hand helds for a while and that has been my experience so far. Often I find myself turning off the IR and just using the zoom or wide camera on my Autel Max 4T. If I am searching areas around heavy foliage or the water and edge of the river with shades it works because there is a drop in temeratures there that help show the heat signiture of a warmer subject. Need those temperature differences!
 
I am new to the IR drone but have used the hand helds for a while and that has been my experience so far. Often I find myself turning off the IR and just using the zoom or wide camera on my Autel Max 4T. If I am searching areas around heavy foliage or the water and edge of the river with shades it works because there is a drop in temeratures there that help show the heat signiture of a warmer subject. Need those temperature differences!
In thermography it is referred to as Delta T or Temperature difference.
 
  • Like
Reactions: Stormpro
I have no problem picking out the Feral Hogs with my Evo 640T and the drone is quite far away here.
IRX_0002.jpg
 
  • Like
Reactions: Stormpro

Latest threads

Members online

Forum statistics

Threads
11,344
Messages
103,287
Members
10,036
Latest member
luke562