Measuring deer size in trail cam images

[TrailcamTom]

In case you wanted an approximation of deer size or other characteristics in images here's a quick formula to measure. It's not a necessarily important measure, but sometimes it's fun to get into the weeds. Width and height calculations are done separately. To measure width, simply replace the height values below. The best way to gauge distance is by setting up stakes around a trail cam. This is still an approximation though.

• Distance to Object (feet) - It's useful to place markers in front of trail camera to quickly gauge distance.
• Sensor Height/Width (mm)* - Average width is usually around 5.76 and average height is around 4.29.
• Object/Deer Height In Image (pixels) - Use paint or any image software to check number of pixels using the 'select box' tool.
• Image Height (pixels) - Either check the properties of the image or use the same method as above.
• Lens Focal Length (mm)* - Usually around 7.6.

*Sensor Height and Focal Length can be found in your trail cam manual

[Larry]

A little over analyzing are we

 

[G-Man]

the have an app for that called buck score. works well

[GreeneHunter]

Or its a ... spike , 4 -6-8-10 pointer .... or a Doe ?

[grampy]

On 8/24/2018 at 9:32 AM, TrailcamTom said:

In case you wanted an approximation of deer size or other characteristics in images here's a quick formula to measure. It's not a necessarily important measure, but sometimes it's fun to get into the weeds. Width and height calculations are done separately. To measure width, simply replace the height values below. The best way to gauge distance is by setting up stakes around a trail cam. This is still an approximation though.

• Distance to Object (feet) - It's useful to place markers in front of trail camera to quickly gauge distance.
• Sensor Height/Width (mm)* - Average width is usually around 5.76 and average height is around 4.29.
• Object/Deer Height In Image (pixels) - Use paint or any image software to check number of pixels using the 'select box' tool.
• Image Height (pixels) - Either check the properties of the image or use the same method as above.
• Lens Focal Length (mm)* - Usually around 7.6.

*Sensor Height and Focal Length can be found in your trail cam manual

I just ain't smart enough to figure all that out. But I'm smart enough, if I get a good one on cam, to know it's a good one!

[Nomad]

Here’s my system , doe, doe , young buck , holy sh!t look at that one ! 

That is if the cam is actually turned on and working, then of course the time and dates are all off as well .

Pethaps I’ll nail yard sticks to the trees sideways and up and down , that should remove all the math and pixel stuff...

Edited August 26, 2018 by Stay at home Nomad

[grampy]

36 minutes ago, Stay at home Nomad said:

Here’s my system , doe, doe , young buck , holy sh!t look at that one ! 

That is if the cam is actually turned on and working, then of course the time and dates are all off as well .

 

My system too Larry! Exactly!  

Edited August 26, 2018 by grampy

[nyslowhand]

What happened to the pre-cam days when you sat in the tree and evaluated deer as they mysteriously appeared?

I'm in same camp as older mature aged experienced hunters above; either a doe, buck, young, mature, WTF!!!!

[G-Man]

the only.marks i make are by my stand usually paint on a tree to mark of yardage so i dont need to pull out a rangefinder..if its standing at a tree with 25 on it then its 25 yards.. simple

[nyslowhand]

^^^^ or orange surveyor's tape for yardage markers. Me too, I do carry a rangefinder, but have never gotten it out when a deer was coming in.

[Larry]

here is one thing the guy didn't tell anyone. You have to convert all the different forms of measure to one form of measure and how many inches dose a pixel equal on a picture.

[Culvercreek hunt club]

Or you can just figure that an ear is 6" long and estimate the measurements from that with not need of complex math. 

[WNYBuckHunter]

5 minutes ago, Culvercreek hunt club said:

Or you can just figure that an ear is 6" long and estimate the measurements from that with not need of complex math. 

Bingo

[nyslowhand]

... do I hear the sound of fingernails on a chalkboard?