front 1 Principal point (PP) | back 1 the geometric center of the image |
front 2 Conjugate Principle point (CPP) | back 2 the principle point of image B on image A in a photo series |
front 3 RF | back 3 Representative fraction |
front 4 Focal length | back 4 distance to the focal plane from the lens inside a camera |
front 5 Focal length and flying height ratio for scale | back 5 RF=f/H |
front 6 Common focal length | back 6 6" or 152.598 mm |
front 7 Nadir | back 7 the point directly below the sensor |
front 8 Elevation at Nadir | back 8 the distance from sea level to the nadir on the ground |
front 9 Find the scale with this info: Flight altitude = 3048m Elevation at Nadir = 259m Focal Length = 15.2cm | back 9 RF = (15.2cm) / (3048m-259m) x 100 RF = 15.2 / 278,900 RF = 1 : 18,348 |
front 10 Photo and ground distance ratio for scale | back 10 RF = PD/GD |
front 11 Equation to derive flying Height (H) | back 11 H = Flight Altitude - Elevation at Nadir |
front 12 Equation to find object height where relief displacement is clear. what are all the variables? | back 12 h = (d x H) / r r is distance from the principle point h is building height H is flying height d is the building height in the image |
front 13 Equation to find object height where relief displacement isn't clear. | back 13 tana = height/length |
front 14 Relief displacement | back 14 causes tall objects to lean away from the center of the image towards the edges of the photo |
front 15 Wein's Law | back 15 the peak wavelength of radiation emission is inversely related to the temperature of an object. (hotter objects emit shorter wavelengths) |
front 16 Stefan Boltzmann Constant | back 16 In a black body, the total intensity of radiation emitted increases across wavelengths |
front 17 Planck's Law | back 17 hotter objects emit more light and brighter |
front 18 Visible light spectrum | back 18 0.38-0.7 μm |