Exploring images

• A digital image is composed of pixels
• What does the color depth of an image determine?

  Bits used per pixel
• What is the maximum color depth of the GIF file format?

  8-bit
• What does PPI stand for in image resolution?

  Pixels per inch
• How many colors can an 8-bit image represent?

  256
• The PNG file format uses lossless compression.
• Order the file formats by their typical compression type:

  1️⃣ JPEG (Lossy)

  2️⃣ PNG (Lossless)

  3️⃣ GIF (Lossless)

  4️⃣ TIFF (Lossless or Lossy)
• Pixels are the smallest addressable elements that make up a digital image.
• What does the color depth of an image determine?

  Bits per pixel
• An 8-bit color depth allows for 256 colors.


  True
• A 24-bit color depth can represent 16.7 million colors
• Why are vector graphics highly scalable?

  Mathematical formulas
• Raster graphics are ideal for detailed photographs.

  True
• Which file format is best for graphics with transparency and sharp edges?

  PNG
• What is the smallest addressable element of a digital image called?

  Pixel
• What does the color depth of an image determine?

  Bits per pixel
• A 24-bit color depth can display 16.7 million colors.


  True
• The PNG file format is lossless and can support up to 48-bit color depth.
• What is a common use case for TIFF files?

  Scanned documents
• Vector graphics use mathematical formulas, while raster graphics use pixels.
• Raster graphics are ideal for logos because they remain crisp when scaled.

  False
• Why are vector graphics suitable for illustrations and logos?

  High scalability
• What is a common use case for raster graphics?

  Photographs
• Raster graphics degrade in quality when scaled
• Vector graphics generally have smaller file sizes than raster graphics.

  True
• Raster graphics are composed of pixels
• GIF is commonly used for simple graphics and animations
• Match the image file format with its compression type and common use:

  JPEG ↔️ Lossy, Photographs

  PNG ↔️ Lossless, Graphics with transparency

  GIF ↔️ Lossless, Simple animations
• Why is JPEG best suited for photographs?

  Reduces file size
• GIF is suitable for photographs with gradual color changes.

  False
• The resolution of an image is measured in pixels per inch (PPI) or pixels per centimeter (PPCM).


  True
• The JPEG file format uses lossy compression.
• The TIFF file format can use both lossy and lossless compression.

  True
• The resolution of an image is typically measured in pixels per inch (PPI) or pixels per centimeter (PPCM).
• The PNG file format is suitable for images with sharp edges and transparent backgrounds.


  True
• Which file format is commonly used for high-quality images and scanned documents?

  TIFF
• What does PPCM stand for in image resolution?

  Pixels per centimeter
• What is the smallest addressable element in a digital image?

  Pixel
• The resolution of an image is measured in pixels per inch (PPI) or pixels per centimeter
• Which image file format uses lossy compression and is ideal for photographs?

  JPEG