This tells Photoshop not to constrain aspect ratio. When you change your image size notice the number at the top of the dialogue box showing file size will change. This is the document size of your image in MB. The image resolution box sets the number of pixels per inch. But online images can only be displayed at the resolution of the computer screen. Most screens are 72 DPI. You can leave this number as it is. Changing the DPI will change the image size.
If your image is and you change only the DPI field to , your image will be half the size. It will also change your document size. The resampling mode decides which algorithm Photoshop will use to add new pixels. You can try both the see the difference. Adobe Photoshop makes it easy to increase or decrease image resolution. Although, it has certain limitations.
It also depends on the purpose of the image. Do you need a high image quality gallery print or a banner to hang against the wall? Always ask the printing studio what minimum resolution they need. Why not try out our Photography for Beginners course to learn how to take high-quality images every time? Share with friends Share. Show Comments 1 Hide Comments. Related Articles.
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Change Image Resolution in Elements. Applying the Unsharp Mask filter to a resampled image can help refocus the image details. You can avoid the need for resampling by scanning or creating the image at a sufficiently high resolution. Photoshop resamples images using an interpolation method to assign color values to any new pixels based on the color values of existing pixels. You can choose which method to use in the Image Size dialog box.
Nearest Neighbor. A fast but less precise method that replicates the pixels in an image. This method is for use with illustrations containing edges that are not anti-aliased, to preserve hard edges and produce a smaller file.
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. Quickly display the current image size. Position the pointer over the file information box, and hold down the mouse button.
File size.
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