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Resizing my photos3/30/2023 Because the upsizing process involves interpolation, the success of the operation depends on the nature of the original image and the extent of the ‘upsampling’. The same procedures are used for increasing the size of image files. Illustration: downsample for printing.jpg To resample an image so it prints out at a particular size, follow the steps outlined above but set the resolution at 300ppi (or 400ppi for some photolab printers check with your favourite lab for the best resolution setting) and the Document Size dimensions to match the desired print dimensions (in this case 10 x 15cm). Finally, adjust the Pixel Dimensions to the desired output size (Illustration: adjust to output size.jpg).Next, recheck the Resample Image box to ensure the size of the file will be adjusted.Then type 72 into the Resolution box (Illustration: type 72.jpg).First uncheck the Resample Image box (Illustration: uncheck Resample Image.jpg). The digital SLR file requires four steps: Illustration: camera file resized for emailing.jpg Note the change in the file and document sizes. To resize the 72ppi file for screen viewing or emailing, simply type in 640 to replace the 1600 pixels reading in the Width box in the Pixel Dimensions section. Note the differences in the Resolution settings as well as the different pixel dimensions and document sizes. Illustrations: camera file.jpg and DSLR standard file.jpgĬaption: The dialogue boxes above show the default image size parameters for two different digital cameras on the left is a standard 2-megapixel camera, while on the right is a 6-megapixel digital SLR. If you have a 5-8 megapixel camera, the default resolution will probably be higher. However, the actual images may be too large to fit onto a standard computer screen (most of which are 640 x 480 pixels or 1042 x 768 pixels). ‘Downsampling’ is used when you have taken shots with the top resolution and quality settings (which we recommend for images that will be printed) and want to email copies.Most cameras with 2-3 megapixel sensors save files with an output resolution of 72 pixels/inch (ppi), which is ideal for screen viewing. Note: always work on a copy of the image, saving the original as a master you can return to if the resampling is not satisfactory. It can also save you both time and money when you want to have prints made at a lab. It allows you to match the image parameters to the way the image will be viewed, so you can share your photos more effectively. The process is simple, and can be done with virtually any editing application. Regardless of the type of digital camera you own, there will be times when the files it produces have to be resized for either printing or emailing. Changing the sizes of image files is one of the most common software-based tasks in digital photography.
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