Resolution is one of the important properties of digital images that directly affect their display and printing. Resolution is expressed in dots per inch and specifies the relationship between the physical dimensions of the raster and its geometric dimensions when displayed. Sometimes the resolution is mistakenly called the dimension of the image raster. The resolution value is stored in image files. Images captured from digital cameras and other photographic devices are often low resolution, good for viewing on a screen. But in this case, before printing, it makes sense to increase the resolution of the photo.
Necessary
Adobe Photoshop graphics editor
Instructions
Step 1
Open the photo in Adobe Photoshop. To do this, select the "File" item in the main application menu, and then the "Open" item, or press the "Ctrl + O" key combination. In the file selection dialog that appears, go to the directory with the photo, select the photo file in the list and click the "Open" button.
Step 2
Open the dialog for resizing and resizing the image. Press the Alt + Ctrl + I keyboard shortcut, or select "Image" and "Image Size …" from the menu.
Step 3
Change the resolution of the image. Copy the value of the Width field of the Pixel Dimensions control group of the Image Size dialog to the clipboard. Set the "Width" and "Height" fields proportionally if it is not set. To do this, click on the chain image next to the fields. In the drop-down list next to the "Resolution" field, select the "pixels / inch" value. Change the contents of the "Resolution" field. Enter the desired resolution value in it. Paste the value from the clipboard into the Width field of the Pixel Dimensions control group. Click the "OK" button in the dialog.
Step 4
Save a copy of the image. Press the Alt + Ctrl + S keyboard shortcut or select the "File" and "Save As …" menu items. Set the save parameters in the dialog that appears. Click the "Save" button.
