What is the format of photos taken by digital cameras?

If you notice, most of the pictures we use in our life and work are in JPG (short for JPEG, usually lowercase) format. The default shooting format of digital cameras is also JPG. But more professional photographers will choose RAW to shoot. There is no doubt that the RAW format is very important for professional photographers and professional photographers. Ordinary digital cameras can also take photos in RAW and JPG formats. Let's talk about the difference between raw and JPG.

Nikon's RAW suffix is in. NEF format, canon's RAW suffix is in. CR format. Different camera brands have different suffixes for photos in RAW format.

Simply put, the RAW format is to save more data, and white balance, color, highlights, dark parts and so on save a lot of information, which means there is a lot of plastic space in the later stage. Jpeg is a compressed format, but the image quality is well preserved, and the later space is not as good as RAW, but the processing speed is faster. Other differences between RAW and JPG:

1, the RAW format is a photo that has not been compressed and has not undergone any camera automation (except focusing and exposure). The adjustability and adjustable space in the later period are very large. JPG is a photo that is automatically processed by the camera and compressed according to a certain proportion. The greater the compression ratio, the greater the photo loss, which is not conducive to adjustment, display and output.

2. The photos in 2.RAW format will keep all the original layers, which leads to a very large memory. One photo takes up10m-30m-30m (depending on the camera and shooting content). JPG is compressed, and the memory is very small. A photo is about 3m-7m. For the same reason.

3.JPG format is small and easy to transmit; Easy to view with commonly used picture viewing software; Convenient network support, almost all networks (Weibo, Space, Blog, official website, etc. ) supports JPG format; It is convenient to transmit and publish, and it is faster to transmit files and publish pictures. RAW format is inconvenient. The RAW photos taken need to be converted by special software (such as CS5, CS6, LR, software provided by camera manufacturers, etc.). ). After conversion, they can be saved in JPG format (or RAW, TIFF format, etc.). ) and then use it. The most exciting and surprising thing about RAW is the conversion process, in which all levels of photos can be adjusted. The original RAW photo looks dull and gloomy, but it will light up immediately after a slight adjustment during conversion. Of course, if there are many photos, the conversion time is also very long, which requires patience. In addition, saving in JPG format after RAW conversion is much better than shooting JPG directly.

4.JPG format photos are relatively small, and the image quality will be lost if they are enlarged to a certain extent; Not conducive to cutting, not conducive to a large number of adjustments, synthesis and so on. , will have different degrees of influence on the image quality. Various imaging quality shortcomings of RAW format photos are bursting JPG. The more professional the photography field, the more you will choose the RAW format to shoot. For example, wedding dresses, photo shooting and children's photography are all in RAW format. Not to mention the documentary competition of landscape architecture, not to mention commercial photography. JPG is suitable for general life records, which is convenient and quick, without output and complicated adjustment.

5.RAW and JPG will affect the camera's continuous shooting speed, photo saving speed and display speed. The former is slow and the latter is fast.

Bottom line: JPG is easy to use and suitable for the public; Students' professional quality is good but troublesome.

SLR cameras generally have some options: JPG fine, JPG standard, JPG universal, and RAW, RAW+JPG (fine, standard, universal) and other formats. Some Canon cameras are subdivided into more formats, such as RAW.

RAW is to take photos in RAW format alone; JPG should take a photo of JPG alone; RAW+JPG is to take a photo, and the camera will automatically save one of these two formats, which is also the slowest but safest way to save. Regardless of Nikon Canon, if you want to choose the best, safest, safest and best shooting method, regardless of time cost, it is recommended to use RAW (maximum) +JPG (fine). Many business photos will be taken in this way. The reason is simple: the RAW format keeps its own storage, refining and output; JPG is used to view and compare selected movies at any time, or to hand them over to customers directly after shooting.

Some cameras also use TIFF format.

Brief introduction of TIFE format

The full name of TIFE is marked image file format, and the extension is TIF. TIFF is a lossless compression format (the compression rate is as high as 2-3 times). This kind of compression is the compression of the file itself, that is, it records some repeated information in the file in a special way, and can completely restore the file, maintaining the original color and hierarchy. Advantages are good image quality and higher compatibility than RAW format, but it takes up a lot of space. For example, the 2-megapixel RAW format images taken by digital SLR cameras occupy almost 6MB of capacity space, so TIFF format is usually used for more professional purposes, such as book publishing and poster printing, and is rarely used on the Internet.