Digital Imaging

There is a ‘hidden’ image in this grid. It has been encoded using 0s and 1s. What do you call this?

• Bit Pattern
• Bit Map
• Pixel Map
• Pixel Pattern

Why is this called a “bit pattern”?

• Because 0s and 1s are small numbers
• Because it’s hard to see the pattern
• Because 0s and 1s are bits (binary digits)
• Because it’s not much of a pattern

Bitmap images are made up of lots of picture elements Also known as . . .

• picels
• pixels
• picxels
• pictels

What happens when you copy small or low quality image from the Internet and try to enlarge it?

• They become pixelated
• The resolution is increased
• They get sharper
• They become pixel rated

What is the effect of increasing the resolution of an image?

• The image has more white
• The image gets bigger
• The image quality improves
• The image gets smaller

Which image has the highest resolution?

• 8 x 8 pixels
• 16 x 16 pixels
• 32 x 32 pixels
• 64 x 64 pixels

The iPhone 5S has a resolution of  1136 x 640 at 326ppi. What does ppi stand for?

• Pixels Plus Inches
• Pixels Per Inch
• Pixels Per Image
• Pixels Plus Image

On which phone will pictures look better?

• iPhone 5S Resolution = 1136 x 640 at 326ppi
• Galaxy S4 Resolution = 1920 x 1080 at 441ppi
• Lumia 925 Resolution = 1280 x 768 at 334ppi

On average, computer screens have 1,366 x 768 pixels. How many pixels are used when we display images?

• 1366 – 768 = 598 pixels
• 1366 + 768 = 2134 pixels
• 1366 ÷ 768 = 1.778646 pixels
• 1366 x 768 = 1,049,088 pixels

Digital cameras use the term ‘Megapixels‘ (MP). The iPhone 6 has an 8MP camera. What does this mean?

• Photos taken have 8,000 pixels
• Photos taken have 8 huge pixels
• Photos taken have 8 million pixels
• Photo taken have 8 x 8 pixels