Adobe Photoshop

An Introduction to Digital Photography

Why Go Digital?

 No costs for film, chemicals, paper.

 No need for darkroom space or darkroom technician.

 Immediate access.

 Interface with computer publishing tools.

Is There a Downside?

 High initial expense.

 May be less image quality than film.

 Archiving file format for future use is impossible to anticipate.

 Complexity of equipment.

Types of Digital Cameras

    Fixed-location studio camera (advertising)   $50,000 + High-resolution image files (80-200 MB) Print photojournalism camera   $5,000 + Good resolution (5 -15 MB) New-media capable camera   $700 + Resolution adequate for professional web use, CD-ROMs, or prints to 8 x 10 (around 5 MB).

Amateur camera   $200+ Resolution adequate for web use, or snapshot-size prints.

The Digital Darkroom

 How is “image editing” software used?

 Image file management.

   Retouching to correct deficiencies.

Image processing for production environment.

Image manipulation and transformation.

 Image creation.

Some Examples...

File Management - 1

 Changing from 24-bit to 8-bit (system palette).

24-bit 8-bit

File Management - 2

 Resizing to change file size and/or resolution.

Retouching to Correct Deficiencies -1

 Sharpen Before After

Retouching to Correct Deficiencies - 2

 Correct color balance.

Before After

Image Processing for Production - 1

 Adding text to image.

Image Processing for Production - 2

 Preparing image for photomechanical reproduction.

Image Manipulation and Transformation - 1

 Arbitrary Color.

Image Manipulation and Transformation - 2

 Pointillize

Image Creation - 1

 Paint/Draw on Image.

Image Creation - 2

 Compositing/Montage: for documentary/communications media.

Image Creation - 3

 Compositing/Montage: for illustration and fine art creation.

Image Creation - 4

 Compositing/Montage: for illustration and fine art creation.