Page 66 - DCAP109_GRAPHIC_TOOLS

Unit 3: Introduction to Photoshop

Notes
Figure 3.5: New Image Dialog Box

Source: http://whatis.techtarget.com/WhatIs/images/
To open an existing image, follow these steps:
1. Click File from the Application Bar.
2. Click Open.

3. Navigate to your saved file.
4. Click Open.
To save an image, click File and then click Save.

3.2.1 Hue, Saturation and Brightness

Hue, saturation, and brightness are parts of color in the red, green, and blue (RGB) plan. The
aforementioned terms are most frequently utilized as a part of reference to the color of every
pixel in cathode ray tube (CRT) monitors. All conceivable colors could be specified as hue,
saturation, and brightness (also called brilliance ), all in all as colors could be represented as the
R, G, and B components.

Most sources of visible light contain energy over a band of wavelengths. Hue is the wavelength
within the visible-light spectrum at which the energy output from a source is greatest. This is
shown as the peak of the curves in the accompanying graph of intensity versus wavelength. In
this example, all three colors have the same hue, with a wavelength slightly longer than 500
nanometers, in the yellow-green portion of the spectrum.

LOVELY PROFESSIONAL UNIVERSITY 59