Digital Images

Kiran Budhrani kiran.enderun@gmail.com

Explore a beautiful media element

Access (capture) Select Use

Text Images Audio Video

Access Images 1. WEB 2. CAMERA 3. SCANNER

For Screen For Print

Use

 What is it ?

  How big ?

  How clear ? How bright / dark ?

 What type of file ?

Selection

CONTENT

RESOLUTION

FILE FORMAT

4 Factors :

QUALITY

PIXELS TALL

PIXELS WIDE

 Photos  Real, Evidence

 Illustrations / Graphics  Representation, Not real

 Illus – typically hand-drawn  Graphics – typically created with the

computer

Photos vs. Illustrations

Graphic

Illustration

2D Graphic 3D Graphic

3D Graphic

Logos

 .JPEG (joint photographic experts group)  Photos

 .PNG (portable network graphic)  High quality web graphics or photos  Supports transparency

 .GIF (graphics interchange format)  Low quality web graphics  Supports transparency  Logos

File Formats

Common Trends

Image Resolution Image Quality File Size

 Photo / Illustration

  Image Size

  Clarity, Brightness

 File Extension

Selection

CONTENT

RESOLUTION

FILE FORMAT

4 Factors :

QUALITY

Selection and Use

FOR SCREEN FOR PRINT

Content Appropriate Appropriate

Resolution Low-High (file size)

Must be High (file size)

Quality Must be Good Must be Good

Format JPG, PNG, GIF JPG, PNG

The more megapixels a camera has, the better the pictures.

12.1 MEGA PIXELS 5 MEGA PIXELS

The more megapixels a camera has, the better the pictures.

12.1 MEGA PIXELS 5 MEGA PIXELS

big fat lie

3  Megapixel  Camera  has  3  Million  %ny  colored  dots  in  a  photo  

2,048 (horizontal) x 1,536 (vertical) pixels 3,145,728 pixels

Understanding Megapixels

 High MP is only useful if you will usually: 1. Crop photos 2. Print photos that are blown-up

 4MP camera – good enough for screen view

 If there are more pixels in an inch.. – higher quality, higher resolution

Compare Cropping Details

10 MP camera 5 MP camera

5”

7” 10 MP

5”

7” 10 MP

5”

7” 10 MP

5”

7” 10 MP

5”

7” 5 MP

5”

7” 5 MP

5”

7” 5 MP