Recent content by kjwhitcomb

The reason would be to be able to estimate the size of objects from imagery taken from known altitudes. If I can accurately determine the IFOV, record the altitude at which an image is captured, and count the pixels in an object, then I'll know the approximate size of the object. This all starts...

Thanks for the quick response. My question is, has anyone actually measured/confirmed this? For example, I have a Jeep that is 189.8 inches long. Took a shot from 87 meters up. If the HFOV is only 73.3 degrees, then I would expect the Jeep to be about 237 pixels. Blowing it up and counting I...

I assumed that the spec sheet 84 degree FOV is the diagonal FOV, giving a HFOV of 73.7 degrees. However, when I shot stills and videos of my jeep from various heights and distances and counted pixels, I consistently ended up with more pixels than I calculated. But when I used 84 as the HFOV, the...