Communication: text and graphics

1
Communication text and graphics

• Session 3
• Capturing images fit for purpose

2
Objectives

• To provide the knowledge, skills and
  understanding needed to capture still images,
  using digital cameras and scanners, taking
  account of fitness for purpose
• To consider the classroom management issues
  associated with capturing images
• To review existing practice

3
Exchanging and sharing information (Year 7)

• Refining and presenting information
• Use ICT to draft and refine a presentation,
  including
• capturing still and moving images and sound
  (e.g. using a scanner, digital camera,
  microphone)

4
Manipulating images for a purpose
5
Exchanging and sharing information (Year 8 and
Year 9)

• Communicating
• Year 8 Understand some of the technical issues
  involved in efficient electronic communications
  (e.g. size and type of file)
• Year 9 Apply knowledge of the technical issues
  involved to communicate information efficiently
  (e.g. choose suitable file types to speed up
  transfer)

6
Why reduce file size?

• To fit the image onto a floppy disc
• To email the image
• To save disc space on the network
• To enable a web page containing the image to load
  more quickly
• To enable a computer with limited memory to
  manipulate the image more quickly

7
Appropriate bitmapped file formats
8
bmp 196K
gif 11K
jpg low compression 13K
jpg high compression 5K
9
Selecting file formats for a purpose

• Exchanging and sharing information (Year 7)
• Refining and presenting information
• Use ICT to draft and refine a presentation,
  including
• capturing still and moving images and sound
  (e.g. using a scanner, digital camera,
  microphone)

10
Comparison of vector and bitmapped images
11
Picture element (pixel)
12
Pixels
13
Bitmapped Images

• BMP
• GIF
• JPG

14
Vector images
15
Vector images

• Many formats
• WMF
• DXF

16
Objective

• To provide the knowledge, skills and
  understanding needed to capture still images,
  using digital cameras and scanners, taking
  account of fitness for purpose

17
Exchanging and sharing information (Year 7)

• Refining and presenting information
• Use ICT to draft and refine a presentation,
  including
• capturing still and moving images and sound
  (e.g. using a scanner, digital camera,
  microphone)

18
Exchanging and sharing information (Year 8 and
Year 9)

• Communicating
• Year 8 Understand some of the technical issues
  involved in efficient electronic communications
  (e.g. size and type of file)
• Year 9 Apply knowledge of the technical issues
  involved to communicate information efficiently
  (e.g. choose suitable file types to speed up
  transfer)

19
Planning for teaching the objectives

• Have my pupils used a digital camera before?
• How many of my pupils have used a scanner before?
• How will I arrange for pupils to take photographs
  or scan them in?
• How will I ensure that all pupils have an
  opportunity to use cameras and scanners?
• How much technical information do pupils need to
  know to complete the tasks successfully?
• What will I need to prepare to enable this to run
  smoothly in my classroom?

20
Objectives

• To provide the knowledge, skills and
  understanding needed to use digital cameras and
  scanners to capture still images, taking account
  of fitness for purpose
• To consider the classroom management issues
  associated with capturing images
• To review existing practice