BCA - Computer Graphics

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Explain Antialiasing

The smoothing of image roughness induced by aliasing is known as antialiasing.
Adjusting pixel placements or intensities to create a more gradual transition between the colour of a line and the backdrop colour is one method.

Explain Frame Buffer

The image presented on a computer display's final digital storage region. By loading a picture into the frame buffer, software makes it appear onscreen.

Define Major / Minor axis of ellipse.

The diameters (lines through the center) of an ellipse are its main and minor axes.
The diameter of the major axis is the largest, while the diameter of the minor axis is the smallest.
If their lengths are equal, the ellipse is a circle.

The longest diameter of an ellipse is
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List Hard copy graphics devices.

Dot matrix Printer / Inkjet Printers / Laser Printers / Thermal Printers / Plotters

What is a pixel ?

A pixel (short for image element, abbreviated "pix" for "picture") is one of the numerous small dots that make up a computer's memory representation of a picture.
Each of these information elements is an abstract sample, not a dot or a square.

Explain Convex and Concave Polygon.

One or more of the inner angles of cave polygons exceed 180 degrees.

All of the inner angles of a convex polygon are less than 180 degrees.

A line segment that connects two non-consecutive vertices of a polygon is called a diagonal.

Define Reflection.

In computer graphics, reflection is used to represent reflecting objects such as mirrors and bright surfaces.

In a ray trace rendered, reflection is achieved by following a ray from the eye to the mirror, calculating where it bounces, and repeating the process until no surface is
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Define Circle and Chord of circle.

A circle is a symmetric figure with eight sides. In all quadrants, the circle has the same shape. There are two octants in each quadrant.

A circle's chord is a line segment that connects any two locations on the circle.

What is Scaling ? Differentiate between Uniform and Differential Scaling.

Scaling transformations alter the shape of an object by multiplying each vertex (x,y) by the scaling factor Sx,Sy, where Sx is the x scaling factor and Sy is the y scaling factor.

When both of these parameters are assigned the same value, uniform scaling occurs.

Differential
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List the methods used for producing color displays with CRT.

Beam Penetration Method and Shadow Mask.

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