Quize 6 part1

• Topics

  • Computer Graphics
  • Image Processing
  • Computer vision
  • 3D modeling
  • Computer Aided Design (CAD)
  • Computer Aided Manufacturing (CAM)
  • Presentation Graphics
• Computer Graphics


  Representation of image data by a computer, specifically with help from specialized hardware and software
• Hardware for computer graphics

  • Graphics Cards
  • Cameras
  • Motion sensors
• Software for computer graphics

  • Adobe Photoshop
  • Unity
  • Blender
• Pixels


  Smallest element in an image, square shape
• Image Dimensions


  Measured by the Width x Height of a digital image, e.g. 1920 x 1080 (Full High Definition)
• Graphic Types


  • Bitmap Graphics (Raster graphics)
  • Vector Graphics (Object Oriented Graphics)
• Bitmap/Raster Graphics


  A rectangular grid of pixels, with each pixel's color being specified by a number of bits
• Bitmap/Raster Graphics File Formats

  • JPG
  • BMP
  • PNG
  • GIF
• Bitmap/Raster Graphics Painting Software

  • MS Paint
  • Adobe Photoshop
  • GIMP
• Factors determining image quality in Bitmap/Raster Graphics

  • Color Depth
  • Resolution
• Color Depth


  The number of bits devoted to each pixel
• Simple Bit Mapped (Monochrome)


  Each pixel represented by 1 bit, can be 0 or 1 (Black or White)
• Calculating file size of a simple bitmap image

  1. Total Number of pixels in the image = 250 * 200 = 50,000 pixels

  2. File size = 50,000 pixels * 1 bit/pixel = 50,000 bits
• Gray-scale graphics


  Uses 8 bits per pixel, allows up to 256 different shades of gray
• Calculating file size of a gray-scale image

  1. Total Number of pixels in the image = 250 * 200 = 50,000 pixels

  2. File size = 50,000 pixels * 8 bit/pixel = 400,000 bits ~ 50,000 bytes
• Colored Graphics


  Modern PCs use 24-bit (True Color) to display millions of colors at a time, photorealistic color (RGB: Red, Green, Blue)
• Calculating file size of a 24-bit colored image

  1. Total Number of pixels in the image = 250 * 200 = 50,000 pixels

  2. File size = 50,000 pixels * 24 bit/pixel = 1,200,000 bits ~ 150,000 bytes
• Resolution


  Measurement of the pixel density of an image, usually in pixels per inch (ppi) or dots per inch (dpi)
• Object Oriented Graphics (Vector graphics)


  Scalable graphics built using mathematical formulas, can be resized without losing image quality
• Drawing Software for Vector Graphics

  • Adobe Illustrator
  • Inkscape
• Vector Graphics File Format


  SVG - Scalable Vector Graphic
• Image Processing


  • Filtering and cleaning (eliminate red eye, facial blemishes)
  • Enhancing and editing (can distort and merge photos, create fabricated images)
• Image Processing Examples


  • Medical field help doctors clean x-ray images
  • Images from Moon and Mars missions analyzed for detecting life-sustaining resources
  • Cleaning Captcha Phrases
• Computer Vision


  A field that includes methods for acquiring, processing, analyzing, and understanding images
• Research Areas in Computer Vision

  • Object detection
  • Tracking
  • Action recognition
  • Facial Recognition
• Object Detection


  • Example
• Tracking


  • Example
• Action Recognition


  • YouTube Link
• Facial Recognition


  • Snapchat Filters
• 3D Modeling Software


  Process of developing a mathematical representation of any surface of an object in three dimensions via specialized software, with ability to rotate and view from different angles, and create walk-through 3D environments
• 3D Modeling Software Tools

  • Blender
  • 3D Max
  • AutoCad
  • Sweet Home 3D
  • Unity (game engine)
• 3D Modeling Examples


  • Dorms Nightmare GamePlay, Game Created By Walid Abu Ali & Hamad Mubarak
  • 3D Animation Showreel, By Walid Abu Ali - BS IT Multimedia
  • The Hobbit movie motion capture
  • 3D home design
• CAD - Computer Aided Design


  Use of computer systems to assist in the creation, modification, analysis, or optimization of a design, cheaper and faster than design-by-hand
• CAD Examples


  • Architects build virtual plans
  • Engineers design bridges, electric schematics, computer chips: PCB (Printed Circuit Boards)
  • Medical engineers develop implants and human body models
• CAM - Computer Aided Manufacturing

  Use of software to control machine tools to help manufacture products, translates CAD designs into manufacturing instructions
• CIM - Computer Integrated Manufacturing


  Combination of CAD/CAM, manufacturing approach of using computers to control the entire production process, increased productivity, enhanced flexibility, improved quality
• Presentation Graphics


  Used for lectures, sales demos, seminars, includes images, animation and video clips, don't condense slides with too much text, choose correct design theme colours
• Presentation Graphics Software


  • MS PowerPoint
  • Prezi