3.3.6 Representing images

• Digital images enhance user interfaces
• Which of the following is an example of a vector image file format?

  SVG
• What is the purpose of image manipulation in computing?

  Modify or enhance visual data
• A digital image is stored and manipulated on a computer
• Match the common image file formats with their characteristics:

  JPEG ↔️ Good for photographs

  PNG ↔️ Supports lossless compression

  BMP ↔️ Larger file size
• Digital images are composed of a grid of pixels
• The number and density of pixels in a digital image is called its resolution
• Vector images lose quality when scaled.

  False
• What is the process called that converts analog images into digital format?

  Digitization
• Vector images use mathematical equations to define shapes and lines.


  True
• The JPEG and PNG formats are examples of raster
• Match the image type with its property:

  Raster ↔️ Grid of pixels

  Vector ↔️ Mathematical shapes
• In the RGB model, each color component is assigned a value between 0 and 255.
• What is the primary purpose of the JPEG file format?

  Photographs and images
• GIF supports transparency.


  True
• What are digital images essential for in computing?

  Displaying information
• The number and density of pixels determine the resolution of the image.
• In digital images, color is represented using the RGB color model.
• Match the RGB component with its description:

  Red (R) ↔️ Determines the amount of red in the color

  Green (G) ↔️ Determines the amount of green in the color

  Blue (B) ↔️ Determines the amount of blue in the color
• JPEG is a lossy image format, while PNG and GIF are lossless formats.
• JPEG uses a lossy compression algorithm to reduce file size, while preserving image quality.


  True
• For what type of images is lossless compression typically preferred?

  Graphics with text or shapes
• Match the image type with its characteristic:

  Raster Image ↔️ Grid of pixels

  Vector Image ↔️ Mathematical shapes and lines
• In digital images, color is represented using the RGB color model.
• Pixels are arranged in a grid to create digital images.

  True
• Vector images retain sharpness when scaled, unlike raster images.

  True
• Transparency is supported in PNG and GIF formats.

  True
• The number and density of pixels in an image determine its resolution.
• What are the primary colors in the RGB color model?

  Red, Green, Blue
• Steps to create a color using the RGB model

  1️⃣ Assign a value between 0 and 255 for each color component

  2️⃣ Combine the red, green, and blue values

  3️⃣ Display the resulting color
• PNG is suitable for graphics with text and simple shapes.
• Transparency is supported in JPEG format.

  False
• JPEG's lossy compression reduces file size at the cost of image quality
• The choice of image format depends on balancing file size, image quality, and support for features like transparency and animation
• JPEG compression removes image data to reduce file size, resulting in a loss of quality.


  True
• What is the primary advantage of lossless compression?

  Preserves image data
• The resolution of an image determines its level of detail and quality.


  True
• What color model is used to represent color in digital images?

  RGB
• What is a digital image in computing?

  Visual representation on a computer
• Digital images use mathematical equations to define shapes and lines.

  False