Photoshop CC // Introcomputergraphicsshs.weebly.com/.../0/83708112/photoshop.pdf · 2019-08-09 · Photoshop CC // Intro . Objectives • Be familiar with the Photoshop environment.

Photoshop CC // Intro

Objectives

•  Be familiar with the Photoshop environment.

•  Understand the concept and use of Photoshop.

•  Create graphics and manipulate images using the different tools of Photoshop.

What is Photoshop?

Photoshop is the leading professional image-editing program, released by Adobe. Photoshop is useful for both creating and

editing images to be used in print or online.

Bitmap (raster)

Photoshop is a bitmap based program. Bitmap images are made up of pixels in a grid. Pixels are picture elements; tiny squares of individual color

that make up what you see on your screen.

Bitmap (raster)

Resolution Bitmap images are resolution dependent.

Resolution refers to the number of pixels in an image and is usually stated as dpi (dots

per inch) or ppi (pixels per inch). The higher the resolution, the

clearer the photo.

Vocabulary: Raster: Raster images are made of pixels. A pixel is

a single point or the smallest single element in a display device. If you zoom in to a raster image you

may start to see a lot of little tiny squares.

Vector: Vector images are mathematical calculations from one point to another that form lines and shapes. If you zoom into a vector graphic it will always look the

same.

Bitmap vs. Vector

FILE FORMATS – Quick Look

WHAT DOES IT ALL MEAN?

FILE EXTENSIONS

JPEG/JPG Joint Photographic Experts Group

•  JPEGS are for high-quality Photographs and realistic images. •  Lossy – permanently eliminates certain data when compressed which reduces file size. •  Looks fine from a distance but loss of quality when zoomed in.

Jpeg/jpg are good for saving high-quality photos at a low file size.

PNG Portable Network Graphics

•  PNG – used for creating iconic graphics, line drawings, and text.

•  Lossless – every single bit of data in original remains after file is uncompressed. •  Files saved are much larger and sometimes too large to send.

PNG files are good for saving high-quality graphic art that does not contain too many colors.

JPG vs. PNG

PSD Photoshop File

•  PSD files are original artwork with layers. •  PSD files are meant to be edited. •  PSD files are often large and not easily shareable.

Always save a PSD version of your work so you can edit in the future.

PDF Portable Document File

•  PDF is a file format used to present documents in a manner independent of applications. •  PDF files cannot be edited. •  Word documents are generally converted to PDF to avoid compatibility issues.