CFP CFP Scene Reconstruction & Photogrammetry

Question 1

What is photogrammetry as applied in forensic crime scene investigation?

Accepted Answer

The science of obtaining reliable measurements and 3D spatial data from two-dimensional photographs

Answer

The process of developing film in a laboratory

Answer

A method for enhancing blurry crime scene images

Answer

The use of special filters to improve photograph contrast

Question 2

Why is it mandatory to include a scale reference in forensic close-up photographs?

Accepted Answer

To allow accurate measurement of evidence size and spatial relationships when the photograph is analyzed later

Answer

To make the photograph look more professional

Answer

To satisfy camera manufacturer requirements

Answer

To indicate which photographer took the image

Question 3

What is a 'total station' and how is it used in crime scene reconstruction?

Accepted Answer

An electronic surveying instrument that measures angles and distances to create precise coordinate data for scene mapping

Answer

A police command post at a major incident

Answer

A camera system that takes 360-degree panoramic images

Answer

A specialized darkroom for processing forensic photographs

Question 4

When photographing skid marks for traffic accident reconstruction, what camera angle best captures length and direction?

Accepted Answer

A low, oblique angle parallel to the road surface, supplemented by overhead or elevated views

Answer

Directly overhead only

Answer

A 45-degree angle from any direction

Answer

Close-up macro photography only

Question 5

What is the purpose of an 'overall' photograph in crime scene documentation for reconstruction?

Accepted Answer

To establish the spatial context of the scene, showing the relationship between all major elements before close-up photography begins

Answer

To document the photographer's equipment

Answer

To capture only the victim's location

Answer

To photograph the outside of the building from the street

Question 6

What does 'rectified photography' correct for in forensic scene documentation?

Accepted Answer

Lens distortion and perspective convergence so that parallel lines in the scene appear parallel in the image

Answer

Overexposed areas in crime scene photos

Answer

Color inaccuracies caused by artificial lighting

Answer

Motion blur from hand-holding the camera