The Best Way to Reduce Pixelation When Enlarging an Image
Below is a tip for reducing the visibility of pixelation caused by image enlargement using Photoshop CS4. When printing an image for display purposes such as printing your photo onto canvas or printing an image to display on your wall, it is always best to avoid using low resolution images. Unfortunately when it comes to projects and children’s homework, using low quality web images is sometimes unavoidable. Using this method you can enlarge an image and improve it slightly so that it may be printed. Even using such a method as this, the image will never be sharp with a high level of detail, but the pixelation caused by enlarging the image will be less evident.
1. Open. Open your image with Photoshop.
2. Increase the image size.
Enlarge the image to double its size by clicking on Image/Image size. In the image size menu, change the width and height drop down boxes to “Percent” and change the document size width and height to 200. Make sure that the resort will image option is ticked and that the image processing type is set to “Bicubic”.
3. Soften pixelation.
Clear some of the jagged edges around the image by applying the despeckle Filter/Noise/Despeckle. This helps to make the image a lot softer. Reducing the appearance of the blocky pixels.
4. Prepare for smoothing.
We must now enlarge the image to double its size again. This can be done by repeating step 2. The reason that we enlarge the image to double its size again is because the next filter that we will apply would be extremely noticeable at 100%. By enlarging the image to double its size first before applying the filter, the effects are much less evident when reduced back down to size. Simply giving the illusion that an artist has gone over the image with a paintbrush enhancing the image and removing obvious signs of poor image quality.
5. Diffuse the image.
Apply the diffuse filter by clicking on Filter/Stylize/Diffuse. Ensure that Anisotropic mode is selected. This filter smooths and enhances the edges of the image
6. Reduce the image size back to 100%.
Click Filter/Sharpen/Unsharp mask and enter the following amounts:
Threshold: 2 levels
Each image is different than these amounts may well change. These amounts should be used as a guide only. Feel free to experiment! Remember, if you are sending image away to be printed onto canvas, NEVER perform this action yourself. Always send the image away in its original state. This way, the professionals have a good starting point and there may be more that can be done to improve the image using professional techniques.
What is the best way to reduce pixelation when printing an image?
When printing a digital photograph on canvas or onto photographic paper for display purposes, the best way to reduce pixelation is to select an image that is high in resolution to begin with. With modern day cameras now a minimum of 5 megapixels, obtaining a high-quality photograph to transfer onto canvas is now even easier than ever. If you have a poor quality photograph of something that could be taken again on a better camera, this is by far the most advisable option.
Source by Daniel Stuart