Join Jan Kabili for an in-depth discussion in this video Resizing and image resolution, part of Photoshop CS4 Essential Training.
When you have that one great image, odds are you're going to want to share it…at different sizes.…Maybe you want the original size to put in a frame and some smaller ones to put…on the web or to put in your wallet.…Before you resize images, it's important to understand how Photoshop handles…resizing and the related topic of image resolution.…To resize an image, I'm going to go to the Image menu at the top of the screen…and choose Image Size.…In this dialog box I can see the current size of my image.…Here at the top, I see the size in pixels.…
Every photograph or other rasterized file is made up of small rectangles of…color information called pixels, which stands for picture elements.…Down here, I can see the size of the file as it would be when printed in inches.…Right now, this file is going to print pretty big at over 16 inches wide and 25 inches high.…That's do in part to the fact that this file came in for my digital camera with…72 pixels allocated to every inch.…That actually is too low a resolution when I'm preparing a file for print.…
- Learning and customizing the interface and workspace
- Utilizing various manual and guided selection techniques
- Working with Adobe Camera Raw
- Adding special effects with layer styles and Smart Filters
- Creating Photomerge panoramas
- Optimizing photos for the web and creating web galleries
Skill Level Beginner
Q: How can artwork be transferred from Photoshop CS4 to Illustrator CS4 without the background?
A: Save the image in Photoshop’s native PSD format. The background in Photoshop must be transparent, meaning there should be no background layer. (To remove a background layer, move your artwork to a separate layer by selecting and copying the content, minus the background, to a new layer, and then delete the background layer. A checkboard pattern behind your image indicates transparent pixels.)
Q: How do I retouch an image I have of an old photograph I scanned?
A: There are a few courses that address image restoration. Check out the Photoshop CS4 Portrait Retouching Essential Training course, and for problems dealing specifically with old photographs, watch the Restoration movies in chapter 15 of the Enhancing Digital Photography with Photoshop CS2. Additionally, learn how to research and date photos with our Growing and Sharing Your Family Tree course.
Q: A client has asked for artwork to be delivered as JPEGs or BMP files in 16-bit format. In Photoshop CS4, there does not appear to be an option to save an image as a 16-bit JPEG. Is there a way to save JPEG files as 16-bit in Photoshop?
A: Unfortunately, JPEGs cannot be saved in 16 bit. JPEGs, by nature, are 8-bit. So if you open a high-bit image into Photoshop CS4, you will see no option in any of the save dialog boxes to save the file as a JPEG. You would first have to convert the image to 8 bit (by choosing Image > Mode > 8 bits/channel) and then save it as an 8-bit JPEG. If you open a high-bit image into Photoshop CS5, you will see the option to save it as a JPEG in the Save, Save As, and Save for Web dialog boxes. But the JPEG will not be saved as 16-bit. Instead, Photoshop will downsample it to 8-bit for you before saving it as JPEG.
1. The Interface
6. Photo Manipulation
7. Photo Adjustments
8. Photo Retouching
9. Raw Processing in Adobe Camera Raw
12. Special Effects
13. Combining Images
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