Remembering resolution

Chapter 2 presents you with an in-depth look at resolution as it pertains to digital imaging. As a quick refresher, keep these points in mind when thinking about printing your images:

l Images themselves have no resolution. Whether in your camera, on your hard drive, or open in Photoshop, your images consist only of tiny colored squares called pixels. The image looks and acts the same within Photoshop, regardless of resolution. An image 3000 x 2000 pixels at 300 ppi is handled in Photoshop exactly as an image 3000 x 2000 pixels at 72 ppi.

l Resolution is an instruction to a printing device. The resolution value that you assign to an image in your digital camera or in Photoshop's Image Size dialog box is recorded with the image strictly as an instruction to the output device.

l Resolution measures the size of individual pixels. 300 ppi really means that each pixel will print at a size exactly X00 of an inch square. Likewise, 72 ppi equates to each pixel printing at >72 of an inch square. Some folks might find this reasoning uncomfortable (although they can deny neither the mathematics nor the logic). Should you run across such an individual, feel free to ask this question: "What if an image's resolution is 300 pixels per inch, but the image is only 299 pixels wide?" (Then smile and buy the next beverage.)

l Web images use only pixel dimensions. Web browsers aren't capable of reading the resolution information embedded in your simple graphics by Photoshop. Each image is displayed in the Web browser strictly according to the number of pixels in the image.

Controlling color using Print with Preview

In the past few years, reproducing accurate color from monitor to printer has become much easier. Although the process of color management still strikes fear into the hearts of many, the actual need for complex hardware and software to control color is greatly reduced. Why? Simply because computer manufacturers recognized that we, the consumers, wanted better color. (Okay, maybe it was all the video gamers that got the attention.) Monitors ship from the factory calibrated and accurate. Printers use smaller droplets and better inks. Software does a better job of communicating color.

For most Photoshop users, accurate color is important. After spending hours tweaking an image's appearance onscreen, surely you want the print to look exactly like the monitor. Here's how to get that great color:

Digital Cameras For Beginners

Digital Cameras For Beginners

Although we usually tend to think of the digital camera as the best thing since sliced bread, there are both pros and cons with its use. Nothing is available on the market that does not have both a good and a bad side, but the key is to weigh the good against the bad in order to come up with the best of both worlds.

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