Adobe 65045315 Photoshop Elements Manual - Page 157

Resizing, About image size and resolution

Page 157 highlights

USING PHOTOSHOP ELEMENTS 10 151 Crop an image Cropping, resizing, retouching, and transforming photos Resizing About image size and resolution The image size (or pixel dimensions) of an image is a measure of the number of pixels along an image's width and height. For example, your digital camera may take a photo that is 1500 pixels wide and 1000 pixels high. These two measurements indicate the amount of image data in a photo and determine the file size. Resolution is the amount of image data in a given space. It is measured in pixels per inch (ppi). The more pixels per inch, the greater the resolution. Generally, the higher the resolution of your image, the better the printed image quality. Resolution determines the fineness of detail you can see in an image. Although a digital image contains a specific amount of image data, it doesn't have a specific physical output size or resolution. As you change the resolution of an image, its physical dimensions change, and as you change the width or height of an image, its resolution changes. Two images (A and B) with same image data and file size but different image size and resolution; C shows that a higher resolution means better quality You can see the relationship between image size and resolution in the Image Size dialog box (choose Image > Resize > Image Size). As you change one value, the other two values change accordingly. Last updated 1/2/2012

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151
USING PHOTOSHOP ELEMENTS 10
Crop an image Cropping, resizing, retouching, and transforming photos
Last updated 1/2/2012
Resizing
About image size and resolution
The image size (or pixel dimensions) of an image is a measure of the number of pixels along an image’s width and
height. For example, your digital camera may take a photo that is 1500 pixels wide and 1000 pixels high. These two
measurements indicate the amount of image data in a photo and determine the file size.
Resolution is the amount of image data in a given space. It is measured in pixels per inch (ppi). The more pixels per
inch, the greater the resolution. Generally, the higher the resolution of your image, the better the printed image quality.
Resolution determines the fineness of detail you can see in an image.
Although a digital image contains a specific amount of image data, it doesn’t have a specific physical output size or
resolution. As you change the resolution of an image, its physical dimensions change, and as you change the width or
height of an image, its resolution changes.
Two images (A and B) with same image data and file size but different image size and resolution; C shows that a higher resolution means better
quality
You can see the relationship between image size and resolution in the Image Size dialog box (choose Image
> Resize
>
Image Size). As you change one value, the other two values change accordingly.