Select one of the three preset sizes shown on the left. Otherwise, click Define Custom Dimensions for a specific size. Another pop-up window appears shown on the right. As you enter a number into one of the boxes, the other box will automatically adjust its number in proportion to the number you just entered.
Step 1: Right-click on the image and select Open. If Preview is not your default image viewer, select Open With followed by Preview instead. Step 4: Enter the width and height information. You may need to switch the size type, like changing from inches to pixels, as shown above. Alternatively, you can select a preset size by clicking the arrows next to Fit Into. Step 1: Right-click on the image and select Open With Gallery on the pop-up menu.
Image editing programs like Adobe Photoshop are ideal when resizing images. Enlargements can be done in Photoshop, however it is recommended to keep enlargements minimal since quality can be easily lost. For example, enlargements would be made for situations such as one needing a document to print with a larger document size or need the image to have a higher resolution while retaining document size.
You may right-click and save the tiger image below to use it as a practice image. The original image was 10" x 6. Lets say we wanted to enlarge this image to a 12" x 8" so that it can easily be printed and framed. We want to keep the resolution, so all we need to do is type in new pixel or document dimensions.
In this example, we increased the document width from 10" to 12" and the height from 6. Before hitting OK, we will want to select our resampling method. What does this mean? Basically, Photoshop will have to create new pixel information in order to enlarge the image.
By selecting bicubic smaller, we are telling Photoshop to interpolate or create new pixel information that will produce the best results when enlarging images. She has been writing since , specializing in made-for-Web content and maintaining her fashion and beauty blog. By Aksana Nikolai. Related Articles. However, this method can produce jagged effects, which become apparent when you distort or scale an image or perform multiple manipulations on a selection.
A method that adds pixels by averaging the color values of surrounding pixels. It produces medium-quality results. A slower but more precise method based on an examination of the values of surrounding pixels. Using more complex calculations, Bicubic produces smoother tonal gradations than Nearest Neighbor or Bilinear. Bicubic Smoother. A good method for enlarging images based on Bicubic interpolation but designed to produce smoother results.
Bicubic Sharper. A good method for reducing the size of an image based on Bicubic interpolation with enhanced sharpening. This method maintains the detail in a resampled image. If Bicubic Sharper oversharpens some areas of an image, try using Bicubic. You can specify a default interpolation method to use whenever Photoshop resamples image data.
For best results when you produce a smaller image, downsample and apply the Unsharp Mask filter. To produce a larger image, rescan the image at a higher resolution. These two measurements, referred to as the document size , determine the total pixel count and therefore the file size of the image; document size also determines the base size at which an image is placed into another application.
You can further manipulate the scale of the printed image using the Print command; however, changes you make using the Print command affect only the printed image, not the document size of the image file. If you turn on resampling for the image, you can change print dimensions and resolution independently and change the total number of pixels in the image.
If you turn off resampling, you can change either the dimensions or the resolution—Photoshop adjusts the other value automatically to preserve the total pixel count. Then resample only as necessary. To change only the print dimensions or only the resolution and adjust the total number of pixels in the image proportionately, select Resample Image and then choose an interpolation method.
To change the print dimensions and resolution without changing the total number of pixels in the image, deselect Resample Image. File size depends on the pixel dimensions of an image and the number of layers it contains. Images with more pixels may produce more detail when printed, but they require more disk space to store and may be slower to edit and print. You should keep track of your file sizes to make sure the files are not becoming too large for your purposes.
If the file is becoming too large, reduce the number of layers in the image or change the image size. Buy Adobe Photoshop or start a Free Trial. Legal Notices Online Privacy Policy. Buy now. Image size and resolution Search. Make it. About pixel dimensions and printed image resolution.
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