Printing - Human Resource - Lecture Slides, Slides of Human Resource Management

Download Printing - Human Resource - Lecture Slides and more Slides Human Resource Management in PDF only on Docsity!

paper: printing and scanning

print technology

fonts, page description, WYSIWYG

scanning, OCR

Printing

• image made from small dots

• allows any character set or graphic to be

printed,

• critical features:

• resolution
  • size and spacing of the dots
  • measured in dots per inch (dpi)
• speed
  • usually measured in pages per minute
• cost!!

Printing in the workplace

• shop tills
  • dot matrix
  • same print head used for several paper rolls
  • may also print cheques
• thermal printers
  • special heat-sensitive paper
  • paper heated by pins makes a dot
  • poor quality, but simple & low maintenance
  • used in some fax machines

Fonts

• Font – the particular style of text

Courier font Helvetica font Palatino font Times Roman font §´∝≡↵ℜ ⊗↵∼ (special symbol)

• Size of a font measured in points (1 pt about 1/72”) (vaguely) related to its height This is ten point Helvetica This is twelve point This is fourteen point This is eighteen point

and this is twenty-four point

Readability of text

• lowercase

• easy to read shape of words

• UPPERCASE

• better for individual letters and non-words e.g. flight numbers: BA793 vs. ba

• serif fonts

– helps your eye on long lines of printed text

• but sans serif often better on screen

Page Description Languages

• Pages very complex
  • different fonts, bitmaps, lines, digitised photos, etc.
• Can convert it all into a bitmap and send to the printer … but often huge!
• Alternatively Use a page description language
  • sends a description of the page can be sent,
  • instructions for curves, lines, text in different styles, etc.
  • like a programming language for printing!
• PostScript is the most common

Scanners

• Take paper and convert it into a bitmap
• Two sorts of scanner
  • flat-bed: paper placed on a glass plate, whole page converted into bitmap
  • hand-held: scanner passed over paper, digitising strip typically 3-4” wide
• Shines light at paper and note intensity of reflection
  • colour or greyscale
• Typical resolutions from 600–2400 dpi