
I. PDF Format 
In
addition to sending photos and artwork as email attachments, you can embed .jpg
or .gif images right into the body of your email. Most
consumer digital cameras already save photos as .jpg files, which makes inserting
photos into emails easy. For screen viewing, even low resolution images (72
dpi)look good. Artwork without subtle shading, such as a simple logo or clipart, is
best saved for screen as a .gif file. 
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). Bitmap images are displayed on your computer screen at screen resolution: 72 or 96 ppi. However, when printing bitmaps, your printer needs much more image data than a monitor. In order to render a bitmap image accurately, the typical desktop printer needs 150-300 ppi.
Scaling
a bitmap image (enlarging it by dragging its corners) does not change the
number of pixels in the image. If you scale to a larger size in
your page layout software, you are going to see a definite jagged appearance.
Even if you don't see it on your screen, it will be very apparent in the printed
image. Scaling a bitmap image to a smaller size effectively
increases the ppi of the image so that it will print clearer.
All scanned images are bitmaps, and all images from digital cameras are bitmaps. Converting between bitmap formats is generally as simple as opening the image to be converted and using your software's Save As... command to save it in any other bitmap format supported by your software.
Common bitmap formats include: BMP, GIF, JPEG or JPG, PNG, PICT (Macintosh), PCX, TIFF, PSD (Adobe Photoshop)
Popular bitmap editing programs are: Adobe Photoshop, Microsoft Paint, Corel Photo-Paint, Jasc Paint Shop Pro, Ulead PhotoImpact
Key Points About
Bitmap Images:
• pixels in a grid
• resolution dependent
• resizing upward reduces quality
• easily convert to other bitmap formats
• restricted to rectangle
• minimal support for transparency
Vector images are made up of many individual, scalable objects. These objects are defined by mathematical equations rather than pixels, so the edges of the text are always crisp and sharp at any scale. This is why vector images are called resolution independent. Objects may consist of lines, curves, and shapes with editable attributes such as color, fill, and outline. Changing the attributes of a vector object does not effect the object itself. You can freely change any number of object attributes without destroying the basic object. An object can be modified not only by changing its attributes, but also by shaping and transforming it using nodes and control handles. Fonts are a type of vector object.
An advantage of vector images is that they're not restricted to a rectangular shape like bitmaps. Vector objects can be placed over other objects, and the object below will show through. When you place a bitmap object over another color, it typically has a rectangular white box around it. Vector graphics tend to have much smaller file sizes than raster-based bitmaps.
Vector images have many advantages, but the primary disadvantage is that they're unsuitable for producing photo-realistic imagery. Vector images are usually made up of solid areas of color or gradients, but they cannot depict the continuous subtle tones of a photograph. That's why most of the vector images you see tend to have a cartoon-like appearance. Even so, vector graphics are continually becoming more advanced.
Vector
images primarily originate from illustration software. You can't scan an image
and save it as a vector file without using special conversion software. On the other hand, vector images can, quite easily, be converted
to bitmaps. This process is called rasterizing. When you convert
a vector image to a bitmap, you can specify the output resolution of the final
bitmap for whatever size you need. It's always important to save a copy of
your original vector artwork in its native format
before converting it to a bitmap; once it has been converted to a bitmap,
the image loses all the wonderful qualities it had in its vector state. Also
keep in mind that opening a vector image in a bitmap editing program usually
destroys the vector qualities of the image and converts it to raster data.
Common vector formats include: AI (Adobe Illustrator), CDR (CorelDRAW), CMX (Corel Exchange), CGM (Computer Graphics Metafile), WMF (Windows Metafile), SWF (Shockwave Flash), and DXF (AutoCAD and other CAD software)
Popular vector drawing programs are: Adobe Illustrator, CorelDRAW, Macromedia Freehand, Xara X
Key Points About Vector Images
• scalable
• resolution independent
• no background
• cartoon-like
• inappropriate for photo-realistic images
• metafiles contain both raster and vector data
Vol. 1 No. 1, January 2004: I. What IS Graphic Design? II. The Good, the Bad and the Ugly III. Your Graphic Identity IV. Why Choose Print?
Vol. 1 No. 2, April, 2004: I. Postcard Promotions II. Type Tips: One Space Betweeen Sentences III. Type Tips: Underlining IV. White Space
Vol. 1 No. 3, July 2004: I. Making Headlines II. Type Talk III. Break Up Text With Graphic Elements IV. The Mission of Kaua`i Design Graphics
Vol. 1 No. 4, October 2004: The COLOR Issue: I. A Color Wheel Refresher Course II. The Impacts of Color III. RGB and CMYK Color
Vol. 2 No. 1, January 2005: I. One- and Two-Color Printing II. Proofreading: Tools of the Trade III. Type Families IV. Calling All Questions!
Vol. 2 No. 2, April 2005: The DIGITAL PHOTO Issue: I. De-mystifying Resolution II. "Photo Quality" Printing III. Adding Type to Photos IV. Photo File Formats
Vol. 2 No. 3, July 2005: I. Hawaiian Punctuation: `okinas and kahakōs II. Identifying & Finding Fonts III. Design Basics: Contrast and Consistency?
Vol. 2 No. 4, October 2005: I. Branding Your Organization II. Stoking the Creative Fires III. Text Alignment: Ragged Right vs. Justified
Vol. 3 No. 1, January 2006: I. Survey Results Are IN II. How Can A Brochure Benefit You? III. 40 Years of Color from Pantone® IV. Virgin vs. Recycled Paper
VII. Do You Want to ReceiveiThe Graphics Grapevine?
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of The Graphics Grapevine will be sent to you by e-mail each
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name to the mailing list, please e-mail linda@kauaidesign.com with "graphics grapevine" in the subject line
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Owner of Kaua`i-based Kaua`i Design Graphics, Linda Pizzitola specializes in ads and print promotions, logos and business identity packages. See samples of her work, a client list and more at www.kauaidesign.com. Linda can be reached by phone at (808) 822-0055 or 635-3703.