file format

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Jpeg is used more often due to its higher compression ratio, and gif is typically used for light weight animation where a flash or something similar is an over kill, or places where transparent background is desired. You should be aware of a few key factors. And having 10 million pixels means it takes 30 million bytes or 30 megabytes to store that photo which is a lot of space!

These files are typically not compressed, resulting in large file. I refer to the Wang and Kofax problems e. First, there are two types of compression: and.

FAQ: Which image format is best?

I have seen many types of image extensions but have never understood the real differences between them. Are there any links out there that clearly explain their differences. Are there standards to consider when choosing a particular type video bokeh full jpg gif png bmp image to use in an application. What do we use for web applications. They are different file formats video bokeh full jpg gif png bmp their file extensions. It is not suited for illustrations, drawings and text, as from compressing the image will standout. Lossy compression, as its name implies, does not encode all the information of the file, so when it is recovered into an image, it will not be an exact representation of the original. However, it is able to compress images very effectively compared to lossless formats, as it discards certain information. As the name implies, lossless compression will encode all the information from the original, so when the image is decompressed, it will be an exact representation of the original. As there is no loss of information in lossless compression, it is not able to achieve as high a compression as lossy compression, in most cases. It can contain both compressed and uncompressed images. When to use a certain image compression format really depends on what is being compressed. Related question: You should be aware of a few key factors. First, there are two types of compression: and. Lossless means that the image is made smaller, but at no detriment to the quality. Lossy means the image is made even smaller, but at a detriment to the quality. If you saved an image in a Lossy format over and over, the image quality would get progressively worse and worse. There are also different colour depths palettes : and. With Indexed it means that the image can only store a limited number of colours usually 256 that are chosen by the image author, with Direct it means that you can store many thousands of colours that have not been chosen by the author. It can have palettes of both Indexed and Direct, but that's a small consolation. The file sizes are so unnecessarily large that nobody ever really uses this format. This means that there can only be a maximum of 256 different colours in the file. That sounds like quite a small amount, and it is. Good for: Logos, line drawings, and other simple images that need to be small. Only really used for websites. As a result it's a Lossy format, and saving the same file over and over will result video bokeh full jpg gif png bmp more data being lost over time. Thirdly, important software like Photoshop have very poor implementation of the format. One method isanother is to save your files with. Of course, this may be a desirable outcome if you're not concerned about filesize, and want to get the best quality image you can. Generally these are either: Lossless compression Lossless compression algorithms reduce file size without losing image quality, though they are not compressed into as small a file as a lossy compression file. When image quality is valued above file size, lossless algorithms are typically chosen. Lossy compression Lossy compression algorithms take advantage of the inherent limitations of the human eye and discard invisible information. Most lossy compression algorithms allow for variable quality levels compression and as these levels are increased, file size is reduced. The images below demonstrate the noticeable artifacting of lossy compression algorithms; select the thumbnail image to view the full size version. The Adam7-interlacing allows an early preview, even when only a small percentage of the image data has been transmitted. It also uses a lossless compression that is more effective when large areas have a single color, and ineffective for detailed images or dithered images. Great for illustrations and photos. It makes huge files and is not really used in applications. It is also not really used in applications. The lossy compression used tends to mar sharp lines. It's in common use on the web now. These image formats may use different compression algorithms, different color representations, different capability in carrying additional data other than the image itself, and so on. For web applications, I'd say jpeg or gif is good enough. Jpeg is used more often due to its higher compression ratio, and gif is typically used for light weight animation where a flash or something similar is an over kill, or places where transparent background is desired. What coobird and Gerald said. The file extension tells you how the image is saved. Some of those formats just save the bits as they are, some compress the image in different ways, including lossless and lossy methods. The Web can tell you, although I know some of the patient responders will outline them here. The web favors gif, jpg, and png, mostly. For the specified difference and usage between the varies of image formats have a good discussion above already. However, I want to add something for the overall process of capturing a picture and storing them. The capturing process Or you can say the construct process as we can draw or make pictures with computers now. Also there are stuff like Pixel Format and Color Space. After you got the basic pixel information, there must be a way for storing them. The basic image file structure For storing the pixels info a file, we need a convention and related algorithms. For saving space, there are compression, but basically problem is encoding the pixels to bytes and decoding the bytes to pixels for display. A typical image file may be consisted by several parts, basically two: meta data or file header and pixel data section. The meta data tells about the image itself, maybe height and width, file format, etc. And the pixel data section is the real section who deals with the real picture. So image files have no priority but also bytes stream actually. For displaying, maybe we should get something to know how monitor works. Hope this helps:- protected by Mar 2 '13 at 6:42 Thank you for your interest in this question. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 on this site the. Would you like to answer one of these instead. Not the answer you're looking for. Browse other questions tagged or.

Only really used for websites. It's worth bearing in mind, however, that it does depend on the complexity of the shapes used. It can contain both compressed and uncompressed images. The meta data tells about the image itself, maybe height and width, file format, etc. Would you like to answer one of these instead? High quality corresponds to low compression, and vice-versa.