Graphic Designer Terminology - Raster VS. Vector, Resolution, DPI, PPI, Halftones & Linked Images

Erin Gipford
Erin Gipford
4.3 هزار بار بازدید - 6 سال پیش - Raster artwork is any digital
Raster artwork is any digital art composed of horizontal and vertical rows of pixels. As a result, when raster images are enlarged, the image quality diminishes significantly. Typical raster file types include .psd, .tif, .jpg, .gif, and .bmp.  #graphicdesign #adobeillustrator #adobephotoshop

Vector art is created using vector illustration software programs, such as Adobe Illustrator or Corel Draw. These programs use mathematic equations and geometric primitives (points, lines, and shapes) to create art that is clean, camera ready, and can be scaled infinitely, without any loss of quality or fidelity.

Resolution refers to the amount of visual detail contained in an image. ... In printing terms, a higher dpi means that the printer will place more dots of ink for every inch of artwork. For most artwork, 300 dpi is preferred. Most printers produce excellent output from images set at 300 ppi.

Though the terms DPI (dots per inch) and PPI (pixels per inch) both describe the resolution (or clarity) of an image, they're not the same thing. PPI describes the number of square pixels that show up in an inch of digital screen (usually between 67-300). DPI, on the other hand, is a printing term referring to the number of physical dots of ink in a printed document.

Halftones are defined as a reproduction of a photograph or other image in which the various tones of gray or color are produced by variously sized dots of ink. Think shades of gray in a photograph or an image printed by a method that creates many small dots such as off set printing.

When you place an image into Illustrator, you can choose to link or embed the image. Below I lay out what each means, list their pros and cons, and show you how to perform each one.

Linked Images
Linked images remain independent of the Illustrator or InDesign file.

Pros
Keeps Illustrator documents relatively small.
Allows you to edit your linked images in another application such as Photoshop and the edits will automatically be applied to the linked image within you Illustrator document.
Can copy and paste an image as many times without increasing file sizes.

Cons
Moving or deleting folders/files, can lead to unlinked images.
Anytime you send an Illustrator file to someone else, you have to make sure to send the linked images as well.


Embedded Images
Embedded images are actually contained within the Illustrator document at full resolution.

Pros
Self sufficient document – You do not have to worry about images unlinking.

Cons
Can result in large Illustrator document sizes.
Have to re-import images after editing them in Photoshop.

More tutorials on my website!
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6 سال پیش در تاریخ 1397/08/22 منتشر شده است.
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