How to create high resolution images on your computer or smartphone

Content
  1. Upgrade any photo on your PC, Mac or mobile device.
  2. Principles for creating a higher resolution image
  3. Create high-resolution images with Desktop Gimp
  4. How to Increase Image Resolution with MacOS X Preview
  5. How to Increase Image Resolution with iPhone Image Size

Upgrade any photo on your PC, Mac or mobile device.

Making and making a digital image smaller is a relatively easy task, but learning how to increase the resolution of an image is a little more difficult. Fortunately, there are a few things you can do to improve the quality of your exploded photo.

This article provides instructions for the Gimp 2.10 desktop, available for Windows, macOS, and Linux. It also includes instructions for macOS X Preview (macOS 10.3 or later) and Image Save, which require iOS 9.0 or later.

Principles for creating a higher resolution image

It’s important to understand what we mean when we talk about increasing the resolution of an image. Resolution refers to the number of pixels in a digital image. The more pixels, the higher the image resolution.

To improve the resolution of an image, we first increase its size and make sure it has the optimal pixel density. The end result is an enlarged image, but it will look less sharp than the original image. The more you render your image, the more you will see the difference in sharpness. Again, we’re just zooming in and adding pixels, not more detail.

As a general rule, 300 pixels per inch is the generally accepted standard for printed images.

To reduce this, you should:

  • Avoid massive upscaling: Of course, every image is different, but if you decide to enlarge by more than 30 or 40 percent, you’ll most likely notice a loss of sharpness.

  • Use the sharpening tools if they are available: not all applications have them, but Gimp and Photoshop have image sharpening features. The final effect can feel unnatural at times, so it should be used sparingly if you want to maintain a look similar to the original image.

Create high-resolution images with Desktop Gimp

Gimp is a free and open source image editing tool available for Windows, macOS, and Linux. It offers broad support for many graphic formats, making it ideal for this type of task.

  1. walk gimp .

  2. Select File > Open .

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    />

  3. This will launch the file selector. Find your image and select Open .

  4. Select the Image tab.

  5. Click Ctrl+A (Windows) or command + A (Mac) to select the entire image.

  6. Stay on the Pictures tab and click ctrl+c or Command+C to copy the image.

  7. Now we’re going to make a higher resolution copy. Select File > New , nasty open a new image template.

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  8. We need to make sure your final image is 300 ppi. To do this, select Extra options.

    You will see that the pre-filled width and height match your current image. Do not change these values.

  9. A dialog box expands showing the X and Y resolutions for the image. The boxes may already indicate that the canvas is set to 300. If not, set both the X and Y values ​​to 300, then select Okay .

  10. You now have a new image window that has the same dimensions as the original photo.

  11. After you are sure you are working on the new image window, select Image > canvas size .

    Menu Item Canvas Size in Gimp for macOS”
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  12. Another dialog box opens. Here we adjust the size of the canvas.

  13. Make sure the chain icon to the right of both dimensions is locked before adjusting the width or height of the canvas.

  14. Enter the desired width for the new image, then click tab .You will see that the height is automatically adjusted to the scale of the image. In this example, we’ll go from just over 4000 pixels to 6000 pixels.

    Don’t forget to memorize or write down your new measurements. You will need this later.

  15. Select Resize .

  16. Stay in the new window of the new image and click Ctrl+V or Command+V to insert an image.

  17. Drag the corner of the window (and resize it if necessary) to clearly see all corners of the resized canvas. You will notice that the image is inserted at its original size in the center of the new image window.

  18. Now we want the pasted image to completely cover the new canvas size. First go to the Layers panel and select Floating selection (pasted layer) if not already selected.

  19. Go to the toolbar pane on the left and select a tool Scale .

  20. Select the inserted image and you will see a scaling guide and a scaling dialog box. Make sure the chain icon is locked in the zoom window, then enter the same width value you used in step 13.

  21. You will see a preview of what your resized image will look like. If everything looks good, choose Scale .

  22. Your image is now resized to the new size.

  23. Before exporting an image, you can check the quality by zooming in. To do this, select Vision > Scale and then select the desired zoom level.

  24. If you are happy with the final result, go to the Layers window and right click Floating selection (pasted layer) and then select anchor layer to fix it in the background. ,

  25. To export an image, select File > Export .

  26. This opens a new dialog box. Choose where to save the resized image and give it a name. Then select Export .

    When naming your image, you can also set the file type by typing in the extension. For example, if you name your image “new_photo.png” it will be saved as a PNG, or “new_photo.jpg” will save it as JPEG.

  27. A final settings dialog box for the saved photo appears. To get the highest possible final image quality, move the Compression Level slider to zero, then select: Export .

  28. Congratulations! You have increased the resolution of your image.

How to Increase Image Resolution with MacOS X Preview

Preview is a useful tool for viewing photos and PDFs on your Mac, but it also includes some useful image editing tools.

  1. Locate the image file, right click on it and select to open with > Example .

  2. Click on icon Highlight Toolbar .

  3. Click on icon adjust size: .

  4. Adjust the width to the desired value and then click Okay . For this example, we’re going to resize the image from 1000px wide to 1300px wide.

    Make sure the padlock icon is closed and “Resample Image” is checked.

  5. Your image will change. Click File > Save to overwrite the original image, or File > Export to save it as a new file.

    Save & File > Export Menu Items in Preview on macOS”
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  6. Done! Your modified image is now saved.

How to Increase Image Resolution with iPhone Image Size

Image Size for iOS is a photo editing tool that also allows you to resize images. It’s free, but you can choose to pay if you want to remove ads.

  1. Install and run Image Size.

  2. Click on the white main box. Click Okay to allow the app to access your photos, then tap the white box again to open the image picker.

  3. Click on the image you want to resize.

  4. Click Select to open your image.

  5. Click necklace icon to lock the width and height values.

  6. Set the desired width and then click Finished . For this example, we will scale the image to 6000 pixels. Your height value will be adjusted automatically.

  7. Your photo will be resized to the new size; You can pinch and zoom to check the pixel quality.

  8. Click on icon equipment to view more options. Make sure the output quality slider is set to 100 percent.

  9. If you are going to print an image, you may want to smooth out a few pixels. To do this, click on the icon + to increase the print size correction factor, then press arrow back to return to the main page.

  10. To save the final image, click save arrow .

  11. This is it! Your modified image is now saved to your camera roll.

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