Computer Graphics ( For BTech, BCA, MCA & UGC-NET Exams)

Explain the aspect ratio as the width-to-height relation and highlight common standards like 4:3, 16:9, and 21:9. Show how software templates preserve image and video proportions across different screen sizes.

Examine how frames define a rectangular region for placing graphics and text, and how a frame buffer stores image data to enable animation through sequences of frames.

Explore how saturation, or chroma, controls the depth and intensity of colors in images, making them more colorful and vibrant by increasing color depth and brightness.

Explain how the aliasing effect creates jagged lines on low-resolution graphics displays and demonstrate smoothing by adjusting the intensity of the pixels along the line and dead pixels.

Foreshortening teaches how to depict a 3d scene in a 2d image by projecting objects with distance, so farther parts appear smaller and proportions adjust for realism.

Explore the overstrike effect in computer graphics by showing how writing the same pixel repeatedly intensifies its color, and how multiple hits alter pixel intensity in photographic media.

Explore flickering as a pixel glitch caused by a too-low refresh rate, where slow display of pixels creates flashing on screens; higher refresh rates reduce this effect.

In halftoning, a reprogramming technique uses dots of varying size and spacing to simulate continuous tone, producing brighter or dimmer areas and a range of visual effects.

Explore dithering, a graphic technique that fools the eye into seeing more colors. Learn how dot spacing creates perceived gray shades from limited palettes and helps manage color banding.

Demonstrates random scan display by drawing image outlines as randomly placed lines using XY coordinates, refreshed 30–60 Hz from memory that stores line-based picture definitions.

Explore the construction and operation of liquid crystal displays, including polarizers, backlight, and the twisted-nematic effect, and compare active and passive matrix LCDs.

Explore conventional and organic light emitting diode displays, their layer structure—electron transport layer, organic emitters, injectors, anode, glass substrate—and how voltage drives recombination to emit light across colors.

Explore how display processors and the video controller convert frame buffer data into screen pixels, using scan conversion and RGB values at X and Y coordinates to render images.

Explore Bresenham's line drawing algorithm, including the decision parameter, slope handling, and pixel selection to draw lines efficiently without floating point arithmetic.

Apply the beauty method to determine missing values in a numerical problem, using rounding rules and incremental steps to fill gaps and arrive at final values.

Code the DDA line algorithm in C++ with a graphics library, computing increments and plotting pixels to draw a line between two coordinates on screen.

Explore the midpoint circle generating algorithm, using radius, symmetry, and a decision parameter to plot circle points across octants by reflecting coordinates.

Explore Bresenham's circle generating algorithm using a midpoint decision parameter to plot circle points across octants by symmetry around the origin using the circle radius.

Explain 2d scaling in computer graphics by applying a scaling factor to coordinates, yielding new coordinates x' = s x and y' = s y, as in (0,3) to (0,9).

Perform two dimensional reflection by flipping coordinates across the x-axis or y-axis, using the matrices for x-axis [1 0; 0 -1] and y-axis [-1 0; 0 1] to obtain new coordinates.

Magnify a two-dimensional object by a factor of two while keeping point C (5,2) fixed, using translate-scale-translate with homogeneous 3×3 matrices and a composite transformation.

Build a composite transformation matrix to reflect about any line with slope m and intercept b by translating, rotating, reflecting, and reversing the steps in correct matrix order.

Explore 3d rotation by rotating points along the x, y, and z axes using homogeneous rotation matrices, with clockwise and anticlockwise conventions and practical 90-degree examples.

Apply 3d scaling along the x, y, and z axes using a diagonal scaling matrix; increase size with factors greater than one and decrease with factors less than one.

Explore 3d reflection by applying reflections on xy, xz, and yz planes. Use reflection matrices to transform coordinates and observe negative components.

Explore 3d shearing transformations in computer graphics, applying matrix-based shearing along x, y, and z axes to deform object shape while preserving volume and overall position.

solve a 3d transformation problem by translating a shape to origin, aligning a 45-degree rotation axis, applying composite rotation matrices, and undoing transforms to obtain rotated coordinates.

Inspect how two-dimensional viewing maps a world window to a device viewport through projection, scaling, and coordinate transformation, preserving aspect while fitting images on diverse displays.