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Digital Height Calculator

Formula

The formula to calculate the Digital Height is:

$OH = \left( \frac{SH}{R} \right) \times \frac{D}{FL}$

Where:

$OH$ is the object height (meters)
$SH$ is the sensor height (millimeters)
$R$ is the resolution (pixels)
$D$ is the distance to the object (meters)
$FL$ is the focal length (millimeters)

What is Digital Height?

Digital height is the height of an object as it appears in a digital image. It is calculated using the physical properties of the camera sensor, the resolution of the image, the distance to the object, and the camera’s focal length. This measurement is useful in various applications such as photogrammetry, surveillance, and image analysis.

Example Calculation 1

Let's assume the following values:

Sensor Height (SH) = 24 mm
Resolution (R) = 4000 pixels
Distance to Object (D) = 10 meters
Focal Length (FL) = 50 mm

Using the formula:

$OH = \left( \frac{24}{4000} \right) \times \frac{10}{50} = 0.012 \text{ meters}$

The Object Height is 0.012 meters.

Example Calculation 2

Let's assume the following values:

Sensor Height (SH) = 36 mm
Resolution (R) = 6000 pixels
Distance to Object (D) = 20 meters
Focal Length (FL) = 75 mm

Using the formula:

$OH = \left( \frac{36}{6000} \right) \times \frac{20}{75} = 0.016 \text{ meters}$

The Object Height is 0.016 meters.