JRN 302: Introduction to Graphics & Visual Communication - Resizing and Resampling

1. JRN 302: Introduction to Graphics & Visual Communication- Resizing and Resampling Thursday, 7/10/14 Class website: http://ccfacourses.cmich.edu/jrn/302/kubik

2. Class Objectives • Lecture • Resizing and Resampling • Exam 1 Review • Homework assignment • Study for Exam • Next Tuesday, 7/15, beginning of class • Work on Project • Next Thursday, 7/17 end of class

3. Resolution and raster images (review) • Resolution is a measurement of the output quality of an image, usually in terms of samples, pixels, dots, or lines per inch (varies according to the intended output devices). • Raster images are resolution dependent • Lo resolution for monitors= 72 to 96 ppi • Hi resolution for printed color pieces= 300 ppi • Hi resolution for printed b/w pieces= 600 ppi

4. Photographs and our Project • For our project, you can use photographs that you don’t own/shoot but • Don’t just right-click and steal an image off of any webpage! Lo res file • Do either • Get images from www.sxc.hu or from someone who gives you permission (and before you do, talk to me about it) • Let’s work with sxc.hu (start on next slide)

5. SXC.HU • These directions are also on your project description sheets for the ID designs…. • Log into the sxc.hu site • I use non-CMU email • Find the image you wish to download. You should look for free images… those further down on the webpage. • Click on the image that you wish to download. • Click on the orange “download” button.

6. SXC.HU • These directions are also on your project description sheets for the ID designs…. • On the new web page, • Make sure the image is in focus (no need to get points off for using someone else’s blurry photo) • If it is in focus, right click and save the LARGE JPG to your desktop (or wherever you are storing your files, remember that the desktop should only be considered temporary storage) • Open up the file in Photoshop. • Go to <Image <Image Size

7. SXC.HU • If the Resolution says “300” at MINIMUM, just hit OK and <Save As a TIF file with a name that makes sense. • Now you can safely place this TIF image in your ID file. • If the Resolution says anything under 300, make sure the Resample box is UNchecked. • Type in 300 next to Resolution. (look to see what changed and what did not change) • Hit Ok • and then <Save As a TIF with a name that makes sense…. You’ve just resized your image. • Now you can safely place this TIF image in your ID file.

8. Resizing = box unchecked • Think of resizing as a trade off • What is it: High dimensions (w, h) and lo res <--> Lo dimensions and hi res = same file size (mb) • When to use = You need a hi res Tiff image for the project to place into your InDesign files Did overall file size change with resizing? No

9. Resampling = box checked • Think of resampling as change • What is it: High dimensions and lo res <--> Lo dimensions and lo res = smaller file size • When to use: You need to save a lot of image files but don’t need them all to be so large (e.g. because you are using them for web images) Did overall file size change with resampling? Yes

10. 1 Photoshop Demo: Resizing • If you take your own digital photographs, you will want to resize them (down- never up!) • Otherwise they’ll be very large and may cause your software to crash • Open up your image in Photoshop • <Image <Image Size • 1st, look at your resolution setting • If it is 300 pixels/inch, go to screen 3 • If not… you need to resize… so go on to the next screen (screen 2)

11. 2 Photoshop Demo: Resizing • If your resolution is not 300 pixels/inch… • Make sure the “Resample Image” checkbox is Unchecked • Change your Resolution to be 300 pixels/inch • (Notice your DS width and height will decrease) • If your width and height are still too big… CHECK the “Resample Image” checkbox • Then decrease either your width or your height • Hit OK • Save this file as a new named flattened TIFF file.

12. 3 Photoshop Demo: Resampling • If your resolution is set to 300 pixels/inch already… • Check to see if your Width and Height (under Document Size) can be reduced • Make sure the “Resample Image” checkbox is CHECKED (Now you are actually Resampling) • Decrease your DS width (or height) • Hit OK • Save this file as a new named flattened TIFF file.