Get a digital camera, a scanner and photo-editing software. Read the user manual to find out the resolution settings for your digital camera. Change the resolution to best fit the quality of pictures you want to produce. Set the resolution at the maximum setting to achieve the highest resolution possible. Empty your memory card because an increase in the resolution increases the size of the photo.
Take photos with your digital camera. Take as many photos as you can to have a variety from which to choose. Take photos of people or of the landscape. Download the photos you have taken to your computer. Create a new folder in which to place the photos. Keep a backup of the photos in your memory card. Select the photos to use and keep a backup of these in a new folder.
Drag the photos you have selected to your photo-editing software. Click on "Quality" or "Resolution" according to the Menu on your computer to find out the resolution of the photos. Choose from the options available, which are high, medium and low resolution. Pick a high number value to change the dots per inch (dpi) or pixels per inch of your photo. Scan your images into the computer and use the same procedure. Make sure the minimum number of pixels for your image is 300 pixels for color and 600 pixels for black and white photos. Limit your pixels to the specified number to produce high-quality images. Use professional graphic software to adjust the number of pixels.
Check your printer to find out if it can produce print quality that matches the resolution you have specified. Adjust the printer settings to the pixels you want it to print. Ensure the resolution is within the 600 or 1200 dpi limit, which is the highest possible quality print. Test the print quality on a different sheet of paper. Print out the final high-resolution photo.