Take a wedding photo in the photo studio. Is the quality recorded by the camera in RAW or JPEG?

Difference between RAW format and JPEG format in camera menu of photographic equipment

1. What is a picture in RAW format?

Almost every digital SLR camera or high-end digital camera can take pictures in RAW format. What does this RAW mean? The original meaning of RAW is "unprocessed", which can be understood as: RAW image is the original data that CMOS image sensor converts the captured light source signal into digital signal.

2.RAW file is a file that records the original information of digital camera sensor, and also records some original data (such as IS0 setting, shutter speed, aperture value, white balance, etc. ) camera shooting production. RAW is an unprocessed and compressed format, which can be conceptualized as "original image encoded data" or more vividly called "digital negative".

3. Advantages of 3.RAW over JPEG format

The advantage of RAW format is that there are many shooting information that JPEG images can't match. Due to the huge amount of information, the exposure compensation and white balance of RAW images can be properly adjusted when they are imaged by computer, and the parameters such as photo style, sharpness and contrast can be changed at will when they are imaged, so those settings that are difficult to judge when shooting can be fine-tuned through the computer screen after shooting. Moreover, these post-processing are lossless, which means that we have processed a RAW file today, and as long as it is still saved in RAW format, we can restore the photos to their original state in the future. This function can't be compared with JPG processing, because the quality of JPG files will decrease every time they are saved.

4. Difference of image quality between 4.RAW and JPEG formats

RAW format files retain more original data than JPEG format files. If you want to get better image quality, you can convert RAW format files into other lossless compressed image file formats. For example, TIFF format, and then use special image processing tools to adjust the images to get high-quality image files. If you don't have special requirements for image quality, or you don't have the ability to post-process photos with photo software, it doesn't make much sense to save files in RAW format. When a camera shoots a JPEG file, it first compresses the file. This compression is harmful to the image quality. The higher the compression ratio, the smaller the file and the worse the image quality.

5. Post-processing of 5.RAW and JPEG formats.

It is inevitable that there will be overexposed (too bright) or underexposed (too dark) photos during our shooting. If you shoot the original document in JPEG format, adjusting the brightness of the picture in post-processing will have a certain impact on the image quality, such as the photos with increased noise, overexposure or underexposure. The document in JPG format is very rescue or correction. In the post-processing, shooting and adjusting the brightness of the picture (overexposed photo) with RAW format file not only has a good effect, but also can correct the original file data and restore more details.

6. Shortcomings of 6.RAW compared with JPEG format

RAW files are much larger than JPEG files, and the same memory card can only hold fewer photos, so the writing time of RAW files is longer. However, with the decline in the price of memory cards, this controversy has become less and less important. Most digital cameras can't shoot RAW files at the same continuous shooting speed as JPEG files. Original files cannot be shared immediately because they need special software to read and convert formats. However, you can select the "RAW+L" file in the camera, so that each photo will save a RAW and JPEG file at the same time.

Knowing the above differences, the above problems can be solved naturally!