Resize Formula Resolution For Free

a welcome back arms it if there is any dialog box in Photoshop that can be so easy yet confusing at the same time then it has to be the image size options dialog box and this is absolutely not Photoshop fault but firstly because image resolution doesn't have a fixed definition and is often mistaken for image quality and secondly to add to the confusion we have ancient statements such as 72 DB is the highest resolution to upload to the Internet it reduces file size while giving the best quality sounds familiar right well this video aims to clear up any confusion around image resolution and in the end show you the best way to resize and optimize your image for the internet or high quality prints but first let's see where the mid of 72 dpi comes from so in the early 1980s some Apple computer screens did in fact have resolutions of 72 dpi this was so that they could render fonts correctly on those old 9-inch monitors and also to ensure compatibility with those dot matrix printers printing at 144 dpi and the reason the monitor had to be around half the DPI of the printer was so that what they saw on screen would match the quality and proportion of the print on paper now before we proceed let's get some terms correct dpi is probably the most familiar and most misused measure of resolution in printing dpi stands for dots per inch that is the dots of ink used by a printer to fill up an inch of a paper for computer screens we have PPI which stands for pixels per inch these pixels that we see on screen are later converted by the printers software into printable ink dots so technically when we refer to a monitors resolution we should say pixels per inch or PPI and not dpi because they are not in dots in the monitor right and over the years our display screens and Printers have improved tremendously making the 72 dpi rule or rather 72 PPI become completely irrelevant apples Retina displays have a resolution of around 300 PPI and some smartphones now display up to 500 PPI I'm going to explain this further but first let's try and understand image resolution everyone is quite familiar with the term resolution right you hear it all the time in the form of lens resolution or camera resolution right now when we were talking about the screen resolution in PPI or pixels per inch and print resolution in dpi we were not talking about the image resolution at all and this is very important to understand resolution quantifies how close pixels dots or lines can be to each other within a physical area and still be visibly resolved so the most important part of this sentence to really understand resolution is physical area a paper has a physical area that you can hold and measure in inches your flat-screen monitor has a physical area and so does the camera sensor which captures the image the fact is a digital image itself has no inherent resolution at all as it has no physical size it's just a certain number of pixels as width and certain number of pixels as height...