![]() Normally PNG files are a little smaller than LZW compression in TIF or GIF (all of these use lossless compression, of different types), but PNG is slower to read or write. One additional feature of PNG is transparency for 24-bit RGB images. ![]() PNG was invented more recently than the others, designed to bypass possible LZW compression patent issues with GIF, and since it was more modern, it offers other options too (RGB color modes, 16 bits, etc). It can replace GIF today (web browsers show both), and PNG also offers many options of TIF too (indexed or RGB, 1 to 48-bits, etc). The most common Raster image file formats are the most important for cameras, printing, and scanning. But if you are concerned with maximum quality for archiving your important images, then you do need to know two things: 1) JPG should always choose higher Quality and a larger file, and 2) do NOT keep editing and saving your JPG images repeatedly, because more quality is lost every time you save it as JPG (in the form of added JPG artifacts… pixels become colors they ought not to be – lossy). Perhaps good enough for some uses even if we do overdo it (web pages, etc). But JPG is good enough in many cases, if we don’t overdo the compression. The most common Raster image file formats are the most important for cameras, printing, scanning, and internet use.įrankly, JPG is used when a small file size is more important than the maximum image quality (web pages, email, memory cards, etc). In general today, JPG is rather unique in this regard, using lossy compression allowing very small files of lower quality, whereas almost any other file type uses lossless compression (and is larger). This degree is selectable (with an option setting named JPG Quality), to be lower quality smaller files, or to be higher quality larger files. A smaller file, yes, there is nothing like JPG for small, but this is at the cost of image quality. ![]() However, JPG uses lossy compression to accomplish this feat, which is a strong downside. Digital cameras and web pages normally use JPG files – because JPG heroically compresses the data to be very much smaller in the file. The most common Raster image file formats, the most important for cameras, printing, scanning, and internet use, are JPG, TIF, PNG, and GIF. ![]()
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