Finish Image Resolution For Free

It's best to look at the pixel dimension of your images as you're making them. As long as they're at least about 1024 pixels wide (for a horizontal image) they should be fine for teaching. The standard resolution for web images is 72 PPI (often called ?screen resolution?).

The JPEG image files have the same (high) pixel resolution and (low) data compression. If opened in software package such as Photoshop, both JPEG image files would open up to the full 39.7Mb files, with no compression.

At 300 pixels per inch (which roughly translates to 300 DPI, or dots per inch, on a printing press), an image will appear sharp and crisp. These are considered to be high resolution, or high-res, images.

Most businesses consider 600dpi and higher to be a high-resolution image or print.

So the answer is yes, albeit a very small one, but some of the other answers have missed it. You're right that the only difference is in the metadata: if you save the same image as 300dpi and 72dpi the pixels are exactly the same, only the EXIF data embedded in the image file is different.

Low Resolution Images Images used on the internet are typically 72 dpi. This is a suitable resolution for websites since it enables a small file size and does not look visibly pixelated on most computer screens. However, images at 72 dpi will ALWAYS look pixelated and low-resolution when printed.

Pixel density So, if you see 72 dpi it means that the image will have 72 pixels per inch; if you see 300 dpi means 300 pixels per inch, and so on. The final size of your image depends on the resolution that you choose.

Pixel density Now, the resolution is expressed in dpi (or ppi), which is the acronym for dots (or pixels) per inch. So, if you see 72 dpi it means that the image will have 72 pixels per inch; if you see 300 dpi means 300 pixels per inch, and so on.

The difference between 300dpi and 72dpi is found in the amount of pixel information (or dots) for every square inch of the image you are viewing. The more dots/pixels the image contains, the sharper the image will print. When designing graphics for commercial printing purposes, your images should be 300 dpi.

300DPI for example, equals 118.11 PPI. For a good printing 300 DPI is standard, sometimes 150 is acceptable but never lower, you may go higher for some situations.