This article will show you how to increase the resolution in an image with desktop GIMP 2.0, macOS Preview (10.3 or later), and Image Size (9.0 or later).
Tips to Increase Image Resolution
The number of pixels in an image or digital photograph is a measure of its resolution. The higher resolution of an image, the more pixels are there.
You can increase the size of a picture to improve its resolution. Then, ensure that it has the best pixel density. Although the result will be a larger image it may appear less sharp than the original. Sharpness will vary depending on how large an image is. This makes the image larger and adds pixels to it, but not more detail.
These tips will help you to prevent sharpening.
- Do not increase the size. All images are unique. You’ll notice a decrease in sharpness if you increase the dimensions by more than 30 percent or 40%.
- Sharpen images with the tools that are available. GIMP and Photoshop have sharpening features. These tools are not available in all apps. You might find the final result unnatural. To keep the same look like the original, use your sharpening tools sparingly.
How to make high-resolution images using GIMP
GIMP, a free and open-source image editor, is available for Windows, macOS, Linux, and macOS. This tool is ideal for this type of task because it supports a wide range of image formats.
How to increase image resolution using GIMP
- Open GIMP.
- Select File> . Select the image you wish to open in the Open Image dialog and then select Open.
- Make sure that the image window is active.
- To select the entire image, press Ctrl+ A on Windows or Command+ an on Mac.
- To copy the image, press Ctrl+ or Command+.
- Select File> New to open the Create an Image dialog box.
- Select Advanced Options to ensure that the final image has a resolution of 300 pixels/inch.
- The dialog box expands to reveal the X and the Y resolutions of the image. You may see that the canvas has been set to 300 by these boxes. You can adjust the X & Y values to 300 or OK if they do not.
- Now you have a new window for your image with the same dimensions and dimensions as the original.
- Click on the window to open the new image. Next, select Image > Canvas size.
- The Set Image Canvas Size dialog box appears. Here you can adjust the canvas size.
- Before you adjust the canvas width or height make sure the chain icon to your right of the measurements is locked.
- Next, enter the new width of your image and then click Tab. The image scale automatically adjusts the height. This is an example of how the height can be adjusted to match the image scale.
- Select Resize.
- To paste the image, use the Ctrl+ V and Command+ V in the new window.
- Zoom out to zoom in on the corners of the image window. You can paste the image in the middle of the new window at the original size.
- If the pasted image is not selected, you can go to the layers dialog. Select floating selection (Pasted Layer).
- Navigate to the Toolbox dialog, and then select the scale tool.
- Click on the pasted image. The ScaleDialog box and a scale guide will appear. Make sure the Scaledialog is locked. Next, enter the same width as in step 13.
- A preview of the final resized image will be displayed. If the image looks good, choose Scale.
- The image has been resampled at a larger size.
- Zoom in on the image before you export it. Select View > zoom and then choose a zoom level.
- Once you are satisfied with the result, click the Layers dialog and right-click Floating Selection (Pasted Layer). Next, select Anchor Level to lock it to your background.
- To export your image, select File > Export.
- The Export dialog box opens. Name the file and choose where to save it. Then select Export.
- The Export image as dialog box opens, allowing you to adjust the settings for your saved photo. Move the Compression Layer slider to zero and then choose Export.
macOS Preview: How to Increase Image Resolution
Preview allows you to view photos and PDFs on your Mac. It also includes image editing tools.
- Right-click the image file and choose Open With> Preview.
- Click the Markup Toolbar icon.
- Choose the Adjusticon.
- After adjusting the width to your liking, select OK. This example will resize a picture with a width of 1000 pixels up to 1300 pixels.
- The image will resize. Select Save> to overwrite the original image. Save > To save the file as a new one, or File > Export
How to Increase Resolution by Using Image Size on iPhone
Image Size for iOS allows you to resize images. You can use it for free or you can pay to remove ads. Download the Image Size for iOS App Store
- Install and open Image Size.
- Tap the main white box. To grant the app access to your photos, select OK. Next, click the white box to open the image picker.
- Select the image that you wish to resize.
- Select To open the image, choose
- To lock the Width and Height values, select the Chain icon.
- Select Done, and then set your desired Widthvalue. This example scales down the image to 6000 pixels. As well, the Height value is automatically adjusted.
- The new size photo will resample the image. To check the quality of each pixel, pinch, and zoom.
- To view more options, click the gear icon. Make sure the Output quality slider has been set to 100 percent.
- Smoothen the pixels if you plan to print the image. Select the +icon option to increase the print size correction factor. Next, select the back arrow to return the page to its original state.
- Select the Save Arrow to save the final image.