30 Questions
What is the result of holding the box with a pinhole in front of a light source in a dimly lit room?
An inverted image of the candle appears on the translucent plate
What is the principle of the pinhole camera model?
Exactly one light ray originating from a point in the scene falls onto a corresponding point in the image plane
What is a characteristic of the perspective projection model defined by the pinhole camera?
The apparent size of objects is dependent on their distance to the camera
What is the advantage of considering the virtual image on the plane in front of the pinhole?
It makes the image easier to analyze
What is the significance of the pinhole camera model in computer vision?
It is an idealized and simplified optical imaging system
When was the camera obscura invented?
16th century
What is the relation between the coordinates of scene and image points in the pinhole projection model?
x = y = f / z
What is the main disadvantage of the pinhole principle?
Not enough light is gathered from the scene
What is the purpose of using a lens in camera technology?
To increase the amount of light gathered from the scene and keep the image in focus
What is the assumption made in the weak perspective projection model?
The scene depth is small with respect to the scene distance
What is the effect of increasing the size of the pinhole?
The image becomes more blurred
What is the main factor that defines the behavior of lenses?
Geometric optics
What is the main factor that affects the spectral composition of illumination?
The type of illumination sources and absorption by object surfaces
What is the result of the varying spectral composition of visible light in the human visual system?
The sensation of color
What is the purpose of the experiment described in the text?
To demonstrate the concept of image formation
What is the role of the pinhole in the experiment?
To allow light to enter the box
What is the outcome of the experiment?
An inverted image of the light source is seen on the plate
What is the primary function of an imaging system?
To project an image of a 3-dimensional scene or object onto a 2-dimensional image plane
What is the result of spherical aberration in real lenses?
Light rays from P form a circle of confusion in the image plane.
What causes chromatic aberration in real lenses?
The index of refraction being dependent on the wavelength.
What type of distortion is shown in figure (c)?
Fish-eye distortion.
What is the purpose of using multi-lens arrangements in real optical systems?
To minimize aberrations.
What is the result of vignetting effects in multi-lens systems?
Light rays are blocked by the appertures of different lenses.
Who is the author of the book 'Computer Vision: Algorithms and Applications'?
Richard Szeliski
What is the z-coordinate of the image point P' in the image plane?
f0
What is the relationship between the coordinates of the scene point P and its image point P'?
x' = fx/z, y' = fy/z, z' = f
What is the condition for the points P, O, and P' to be colinear?
OP = λP'O
What is the value of λ in terms of the coordinates of P and P'?
λ = f/z
What is the equation relating the x-coordinate of P and P'?
x' = fx/z
What is the name of the projection model described in the text?
Pinhole projection
Understand how spectral composition of illumination affects the human visual system. Learn about the impact of illumination sources and object surface absorption on the spectrum. Discover how this physical quantity produces the sensation of color.
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