dynamic contrast ratio

Examples of dynamic contrast ratio in the following topics:

• Resolution of the Human Eye

  • The retina of human eye has a static contrast ratio of around 100:1 (about 6.5 f-stops).
  • Hence, a dynamic contrast ratio of about 1,000,000:1 (about 20 f-stops) is possible.

• Application of Bernoulli's Equation: Pressure and Speed

  • The kinetic energy of the fluid is stored in static pressure, $p_s$, and dynamic pressure, $\frac{1}{2}\rho V^2$, where \rho is the fluid density in (SI unit: kg/m3) and V is the fluid velocity (SI unit: m/s).
  • The SI unit of static pressure and dynamic pressure is the pascal.
  • Static pressure is simply the pressure at a given point in the fluid, dynamic pressure is the kinetic energy per unit volume of a fluid particle.
  • Thus, a fluid will not have dynamic pressure unless it is moving.
  • The Mach number represents the ratio of the speed of an object moving through a medium to the speed of sound in the medium.

• Examples and Applications

  • Mass spectrometry is an analytical technique that measures the mass-to-charge ratio of charged particles.
  • Mass analyzers separate the ions according to their mass-to-charge ratio.
  • The following two laws govern the dynamics of charged particles in electric and magnetic fields in a vacuum:
  • There are many types of mass analyzers, using either static or dynamic fields, and magnetic or electric fields, but all operate according to the above differential equation.
  • The deflections of the particles are dependent on the mass-to-charge ratio.

• Constant Pressure and Volume

  • In other words, the system is dynamically connected, by a movable boundary, to a constant-pressure reservoir.
  • We may say that the system is dynamically insulated, by a rigid boundary, from the environment.

• Dynamics of UCM

  • The ratio of the squares of the periods of any two planets about the Sun is equal to the ratio of the cubes of their average distances from the Sun.
  • Since $T^2$ is proportional to $r^3$, their ratio is constant.

• Winds

  • Here we are interested in the situation where the flow is more or less steady; that is, it lasts for many dynamical times.
  • The ratio of the centripetal acceleration to the gravitational acceleration decreases as
  • as the material flows outward, so within a few stellar radii the angular momentum is no longer important to the dynamics of the flow.

• B.2 Chapter 2

  • The ratio of the momentum unit to the energy unit must be the ratio of the force (momentum per unit time) to the power (energy per unit time), so we get
  • The ratio of the angular momentum unit to the energy unit must be the ratio of the torque (angular momentum per unit time) to the power (energy per unit time), so we get
  • Derive the equations describing the dynamics of the electric and vector potentials in the Coulomb gauge

• Color Vision

  • The U and V components may be sampled at a lower rate than Y (due to narrower bandwidth) and may be quantified more coarsely (due to lower contrast sensitivity).
  • The vertical scale is the contrast sensitivity of human vision, which is the ratio of the maximum visible range of intensities to the minimum discernible peak-to-peak intensity variation at the specified frequency.

• Models, Theories, and Laws

  • A theory, in contrast, is a less concise statement of observed phenomena.
  • The biggest difference between a law and a theory is that a law is much more complex and dynamic, and a theory is more explanatory.

• Combinations of Lenses

  • In contrast to a simple lens, which consists of only one optical element, a compound lens is an array of simple lenses (elements) with a common axis.
  • which is the ratio of the input beam width to the output beam width.