Fingerprinting Exam 1

Delta

The point on a ridge at or nearest to the point of divergence and located at or directly in front of the divergence - tend surround a pattern type

Ridge Count

Drawing a line between delta and core - as long as a ridge is touched or crossed

Sufficient Recurve

Consists of the space between the shoulders of a loop, free of any appendages which abut upon it at a right angle on the outside of the recurve

8 Subtypes of fingerprints

Right loop, Left loop, Double Loop Whorl, Central Pocket Loop Whorl, Plain Arch, Tented Arch, Plain Whorl, Accidental Whorl

The 3 primary types of fingerprints?

Whorls, Loop, and Arches

The percentage of whorls in a population

30%

Percentage of population with loops

65%

Arches in the population

5%

2 or more deltas

How many deltas does a whorl have?

1 delta

How many deltas does a loop have?

0 deltas

How many deltas does an arch have?

Epidermis and Dermis

The two layers of skin

Dermis

What layer of skin has to be damaged for a cut to be permanent?

Unique and Persistant

What are the two known premises of fingerprints?

Hypothenar, Thenar, and Interdigital areas

The three main areas of the palm

Non-porous and Porous substrate

What are the two substrates fingerprints are normally found on?

Sufficient Recurve, Delta, and Ridge Count

What are the requirements for a loop?

Sir Frances Galton

Finger Prints in 1892

Live-Scanner

What is the digital recording method of known friction ridge skin?

Volar Pad

Transient tissue swellings on the fingers that dictate pattern type of fingerprints

Invisible - partial prints

Latent Print

Latent, Patent, and Plastic

Three types of unknown fingerprints

Pixel

The smallest unit of illumination of on a screen - just small squares - compromised primary RED GREEN and BLUE squares

Megapixel (MP)

1,000,000 pixels

Lossy and Lossless

Two types of file formats

Shutter Speed, Aperture, and ISO (film speed)

What are the three functions of a camera that must be considered?