Inhinyero Review Sample Lecture Notes in Statistics Review
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Review Notes in Police Photography Uploaded by Melcon S. Lapina
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Review Notes in Police Photography Compiled by Melcon S. Lapina, MSCrim Characteristics of a Photographic Paper 1. Chloride paper – has a slow speed and is suited for contact printing. 2. Bromide paper – has a fast speed and is recommended for projection printing or enlarging. 3. Chloro-bromide paper – is a multi-speed and could be used in both contact printing and enlarging. TYPES OF FILTERS a. Light Balancing Filter b. Color Compensating Filter c. Neutral Density Filter d. Polarizing Filter Light Balance Filter A filter used to change the color quality of the exposing light in order to secure proper color balance for artificial light films. Color Compensating Filter This is used to change the over-all color balance of photographic result obtained with color films and to compensate for deficiencies in the quality of exposing energy. Neutral Density Filter This filter is used when the light is too bright to allow the use of desired f-number or shutter speed with a particular film.
NOTE: 1. White is the presence of all color 2. Black is the absence of all color light.
BENDING OF LIGHT When traveling in open space, ligh straight line (186,000 miles/second). Howe comes in contact with an object, it may be following manner:
Reflection of Light 1. Specular or Regular Reflection - If surface is very smooth, the refl occurs is called specular or regul 2. Diffuse or Irregular Reflection – Whe rough or granular surface, it bou directions due to the microscopic i interface.
Refraction It is the change in direction of a wa in its speed. This is most commonly observe passes from one medium to another.
Diffraction It is described as the apparent ben around small obstacles and the spreading o small openings. It is also described as the b when it hits a sharp edge of an opaque ob
Polarizing Filter It is used to reduce or minimize reflections on Kinds of Objects subjects like water glass, and highly polished surfaces. 1. Transparent objects – allows suffic pass through them that the object o Light: Its Characteristics & Sources may be clearly seen. 2. Translucent objects – allows light t Light is a form of energy, and to understand light we diffuse it sufficiently that objects o begin with the electromagnetic spectrum which is basically a may not be clearly distinguished. I grouping of all electromagnetic radiation arranged according objects on the other side may be re to the amount of energy contained in the radiation. sharp detail and outline are obscu 3. Opaque objects – so greatly diffuse Visible light is a part of this electromagnetic recognizing the object on the othe spectrum that creates the sensation of light when it falls on the difficult if not impossible. human eye. Rainbow Colors: Violet - 400 to 440nm Blue - 440 to 490nm Green - 490 to 540nm Yellow - 540 to 590nm Orange - 600 to 650nm
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Natural Light Source (Sunlight) Useful Not useful 1. Bright Cancelsunlight anytime. – a lighting condit in open space cast a deep and unif shadow.
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