Image Editing & Sourcing Workshop Scott Haber, Digital Content Coordinator, A&S Communications October 24 , 2017

Introduction & Agenda Basic definitions Software choices Live Photoshop demo and examples Sourcing/Finding images Booking/Scheduling University Photograpy Q&A

Definitions: Image Size Website images are measured in pixels, not inches – device screen and displays sizes vary, so inches aren’t as helpful. Printed images are measured in inches, since you have an actual physical copy of the image that can be measured.

Definitions: Image Resolution Resolution = pixels per inch. Digital images need to be printed at a specific resolution in order to remain sharp and clear at the desired size, whether it’s for a magazine or a wall-sized poster. Resolution only affects printed images, not images on a computer or phone screen. Changing the resolution has no effect on the appearance of that image on a computer screen or phone screen. High res/low res in terms of web images really means “size” in pixels.

Definitions: Aspect Ratio Aspect ratio = shape (width:height) 16:9 and 4:3 are common web aspect ratios, but the numbers don’t tell you a specific image size, just the shape. A 16:9 image is 1.77 (16/9) times as wider as it is high. A 3:4 (portrait) image is 0.75 (3/4) as wide as it is high We crop an image first, before resizing, to get to the desired aspect ratio (shape). Always try to start with an image that’s the same relative shape of your final image.

Definitions: Resampling After determining the shape of an image (aspect ratio), we change the number of pixels to make it appear larger or smaller on a computer or mobile device. This is resampling. Upsampling: taking a small image and adding pixels to make it larger Downsampling: taking a large image and removing pixels to make it smaller Always try to avoid upsampling so that images don’t appear blurry/grainy: start with the largest image you can find.

Software: Photoshop vs.? All Cornell faculty and staff are eligible for a free license to the Adobe Creative Suite (including Photoshop). If you don’t have Photoshop and want to utilize your free license, contact your department IT support, or me via email. Free programs/cropping websites?