photo

• Photography


  A science of obtaining images on a sensitized material by the action of electromagnetic radiation or rays through the use of a camera and its accessories and the chemical process involved therein
• Four major factors to produce a photograph

  • Light
  • Camera
  • Film
  • Chemicals
• Light


  Radiant energy that makes things visible as classified by the wavelength into a system known as the electromagnetic spectrum
• Characteristics of light


  • Reflection
  • Transmission
  • Transparent
  • Translucent
  • Absorption
  • Diffraction
  • Refraction
• Light sources

  • Natural light (for outdoor photography)
  • Artificial light (for indoor photography)
• Classification of light according to intensity

  • Bright sunlight
  • Hazy sunlight
  • Dull sunlight
• Police photography


  The science which deals with the study of the principles of photography and the preparation of photographic evidence and its application to police work
• Objectives of police photography


  • Personal identification
  • Produce a pictorial record of the crime scene
  • Keep police officer's memory accurately
  • Help in securing confessions, disposition and information relating to the case
• Types of photography


  • Forensic photography
  • Photomacrography/Macrophotography
  • Photomicrography
  • Infra-red photography
  • Ultraviolet photography
  • Microphotography
  • Spectograph
  • X-ray photography
  • Flash photography
  • Mug shot photography
  • Thermo photography
  • Aerial photography
  • Underwater photography
  • Night photography
  • Panoramic photography

  
• Forensic photography


  The process of photographing crime scene of any other objects for court presentation
• Ultraviolet photography


  The art or process of photographing or recording unseen objects by means of ultraviolet light or filters
• Spectograph


  A process use in determining the kind of metals submitted for examination
• Flash photography


  Applied to the technique whereby exposures are made with illumination from one or more photograph
• Thermo photography


  A kind of photo where we use laser beam radiation using laser beam film
• Aerial photography


  A kind of photography applied for photo mapping
• Underwater photography


  Photographing things under water
• Three types of photographs

  • Overall photographs
  • Midrange photographs
  • Close-up photographs and evidence photography
• Early forms of camera

  • Box camera
  • Pinhole camera
  • Camera obscura

  
• Ace


  Where the sensitize material is located
• Early forms of camera

  • Box Camera
  • Pinhole Camera
  • Camera Obscura

  
• Pioneers of photography


  • Aristotle
  • Alhazen
  • Joseph Nicephore Niepce
  • Louise Jacques Mande Daguerre
  • William Henry Fox Talbot
  • John F.W. Herschel
  • Daniel Barbaro
  • Frederick Scott Archer
  • Sir Isaac Newton
  • Alphonse Bertillon
  • Dr. R.A. Reis
  • Victor Baltazard
  • Edwin H. Land
• Primary Colors


  • Red
  • Blue
  • Green
• Secondary Colors


  • Cyan
  • Magenta
  • Yellow
• Taking photographs in a crime scene

  1. General to specific

  2. Factual replica of the crime
• Photographs as evidence in court

  Provides enforcers an easier work in court for testimony
• Photograph is just a supplementary or aid in sketch