Chapter 6 Flashcards
What is meant by computer graphics?
The representation of image data by a computer by the help of:
1) hardware (graphics card, cameras, motion sensors)
2) software (adobe photoshop, unity, blender)
What is meant by pixels?
It is the smallest element in an image, that has a square shape
What is a image dimension?
The width*height of a digital image
What are the types of graphics?
1) bitmap graphics (raster graphics):
-Painting pixels on the screen with a pointing device (mouse, stylus)
-Images captured with a digital camera
- It is a rectangular grid of pixels, each pixel color is specified by a number of bits
- it has a file format of (JPG, BMP, PNG, GIF)
- Some of the painting software example are (MS paint, Adobe photoshop, GIMP)
- the factors that determines the quality of the image are the color depth (number of bits per each pixel) & resolution
2) vector graphics (object oriented graphics):
-Pointer movements are translated into lines and patterns on the screen using mathematical formulas
- they can be resized without losing the image quality
- softwares are (Adobe illustrator or Inkscape)
- file format is SVG (scalable vector graphic)
How to calculate the file size of a bitmap image?
So if the image has a dimension of 250 * 200 * pixel/bit = 50,000 pixel it will be 50,000 bit
1 byte = 8 bits
What is meant by resolution?
It is a measurement of the pixel density (pixel per inch ppi, or dots per inch dpi)
What is the difference between bitmap and vector?
1) Bitmap stores the data as dots while vector as objects
2) bitmap has more memory
3) bitmap has a shading and finer detail, while vector has smoother shapes
4) bitmap is good for painting and photographs while vector is good for graphs, charts, logos, drawings, & 3D graphics
What is image processing and where can it be applied in our lives?
It helps in filtering and cleaning an image, it is more powerful than photo retouching, it is used in the medical field as in x-ray’s
What is meant by computer vision?
A method used for acquiring, processing, analyzing, and understanding images (object detection, tracking, action recognition, facial recognition)
What are the 3D modeling softwares?
It is the mathematical representation of any surface of an object in three dimension via specialized software, having the ability to rotate and view it like in (Blender, 3D Max, AutoCad, Sweet home, Unity)
What is meant by CAD (Computer aided design)?
The use of a computer system to assist in the creation, modification, analysis, and optimization of a design
What is meant by CAM?
Computer aided manufacturing, use of software to control machine tools to help manufacture products, it translates the design of a product created on computer with CAD tools into manufacturing instruction for machine tools
What is meant by CIM (computer integrated manufacturing)?
A combination of CAD & CAM using computers to control the entire production process, it is a major step towards fully automated factories which will increase the productivity, quality and enhance its felxibility
What are some of the examples of presentation graphics?
MS PowerPoint, Prezi
What is Animation?
The manipulation of images to appear moving by a rapid succession of sequential images which differs minimally from each other, the frame is one of the pictures, the frame rate is the rate by which consecutive images appear and display the standard is 30fps, computer animations creates effects that are difficult to achieve without a computer using computer generated imagery (CGI)
