Page 217 - DCAP504_Computer Graphics

Computer Graphics

13.4 Summary

• Texture mapping is considered to be the most appropriate type of texturing.
• Texture mapping involves pasting the images on the surface of objects.
• The main goal of ray tracing is to determine the color of each light ray which hits the view
window before reaching the eye.

• Morphing is generally used to generate visual effects; thereby a normal looking person can be
morphed into a cartoon character by employing 2-D and After Effects 5.5.
• Forward mapping, maps the pixels from the source image onto the destination image at
appropriate places.

• Reverse mapping, maps each pixel in the destination image and samples an appropriate source
image.
• Vertex morphing works on the principle of interpolation, where the final vertex position between
the base position and the target position are defined in separate meshes.
13.5 Keywords
API: It is a set of rules and specifications that a software program must follow to be able to access the
services and resources of the other software program.
Beier/Neely line morphing: This method is used to warp the shape & cross-dissolve the colors
independently.

Bas-reliefs: It is a type of art, where the shapes are cut from the surrounding stone to make them stand,
slightly against a flat background.
Bizarre: Unusual situation.
Cuneiform: Writings related to ancient times (Babylonians and Persians). These characters are formed
by the arrangement of wedge-shaped elements.
Curvature Coloring: The regions with similar curvatures are colored with similar colors.
Deciphering: To discover the meaning of something written in a hidden manner.
GPU: Graphical or visual processing unit.
Pictograms: Pictograms are also known as pictographs. The meaning of objects is conveyed pictorially
based on their resemblance to the object.
Plotters: Plotters are printing devices used for printing vector graphics.
Pre-warping: It is the method used for solving problems related to warping.
Raking Lights: Moving light.
Reflectance: It is the ratio of the total amount of radiation of light that is reflected by a surface to the
total amount of radiation that is incident on a surface.
Rendering Time: Rendering is the process of generating an image from a model by using computer
graphics. The time used for the purpose of generation of the image is known as rendering time. The
Graphical Process Unit (GPU) is the built-in device that helps the Central Processing Unit (CPU) to
perform complex rendering.
Tactile Texture: Pleasant texture.
Warping: Warping is a process of digitally manipulating an image with the aim of distorting the image.
It can also be used to rectify image distortions for creative purposes known as morphing.

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