9/7/2023 0 Comments Raster images vs vectorVectors are often saved as AI and CDR files and are swapped around a lot in designing programs. They work especially well for printed brochures, website background images, social media posts, or any picture-quality design. Raster images are often saved in GIF, JPG, PNG, and TIF formats ( to name a few). The filetype is ultimately determined by wherever the image will appear (whether print, online, in another design program, etc.). When working in Photoshop (or any other design program, really), you’ll notice an extensive list of export options. It all depends on the place each image will appear and the type of graphic being developed. Some provide easy editing in other programs while others simply look better in a type of media. Think back to the program you were using to design graphics: when you save and export, you’re more than likely presented with a list of options. They work especially well for logos and illustrations, though. It restricts gradients and shading to a degree, so vector images aren’t the best for rich, complex pictures. The only con here is that vector images have to rely on bold lines and solid colors, giving up a flexible design. When you open a vector image in any program, the formulas will replicate the original image for you no matter the size. This allows for easy scaling without any loss of quality. Points, lines, and curves follow a path and aren’t restricted to pixels and bits. These vector formulas are paths that computer programs know to follow no matter the size of the image. Instead of permanent pixels, vectors are a series of commands. While raster images are arranged in pixels, vectors run off mathematical formulas. In order to understand how vectors work, you’ll need to stretch your imagination a little. The human eye can’t detect much more than 300 PPI, so it caps out to a nice, even number. With anything lower than 300 pixels per square inch, the picture becomes blurry. The standard printing resolution, 300 PPI is the printing sweet spot. PPI mostly becomes important when you’re printing and the pixel density needs to be a set amount to look best. You’ll still be able to design with other PPI sizes and choose your own. Screen resolutions are a lot more advanced today, so don’t feel like you’re restricted to this setting. This used to be the standard or default PPI in a design project. Every Photoshop user should understand these two at least: 72 PPI When you’re designing a raster image, there are a couple of standard PPI figures you’ll come across. Standard PPI Dimensions and What They Mean You’ll have to create variations to get larger or smaller images.īrowse stock photo websites like Website Automatic to get a better understanding of the different sizes and resolutions for raster images. Once an image is finalized, it should remain the same dimension in the future to keep true to its pixel density. (Conversationally, you may hear it called dots-per-inch or DPI). This basically tells the computer how many bits or pixels to display within a given square inch. The level of detail in a final raster image depends on its PPI (or its pixels per inch). The image only needs to dump unnecessary filler color and shading to become smaller, no blurriness involved. However, you can scale down a raster image and retain its good quality. This leaves the image blurry and unsatisfying. When they are stretched, their shading and sharp edges become warped to fit the new dimensions. Raster images, once finalized, can never be scaled up without compromising some of the image quality.
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