What is the difference between raw format and jpg format?

RAW format and JPEG format are two different file formats in digital image processing. Their differences are: 1. RAW format is a lossless or partially lossless format, while JPEG is a lossy format. Compression format; 2. RAW format retains all the original data of the image, while JPEG will lose some details and image data during the compression process; 3. RAW format can have higher color depth, while JPEG format usually uses 8-bit color depth ; 4. RAW format allows more adjustments during post-editing, while JPEG format has a small adjustment range.

# Operating system for this tutorial: Windows 10 system, Dell G3 computer.

RAW (raw) format and JPEG (also known as JPG) format are two different file formats in digital image processing.

1. Compression method: JPEG is a lossy compression format that uses a series of algorithms to reduce the size of image files. This type of compression can significantly reduce file size, but results in a loss of image quality. The RAW format is a lossless or partially lossless format. It retains all the original data in the image without compression, so the file size is relatively large.

2. Image quality: Because JPEG uses lossy compression, some details and image data will be lost during the compression process. This means that JPEG files have relatively low image quality, especially if they are highly compressed. The RAW format retains all the original data of the image, so it can provide higher image quality and allow for more adjustments and editing later.

3. Color depth: JPEG format usually uses 8-bit color depth, that is, each color channel is represented by 8 bits, and a total of about 167 million colors can be represented. The RAW format can have higher color depth, such as 12-bit, 14-bit or even 16-bit, which means that more colors and brightness levels can be captured, providing a wider post-editing space.

4. Post-editing: Because the RAW format retains the original data of the image, it provides greater flexibility and control, allowing more adjustments during post-editing, such as White balance, exposure compensation, color correction, etc. Since the JPEG format has been compressed and processed, the adjustment range and quality during post-editing are relatively small.

It should be noted that since the RAW format saves raw data, it usually requires the use of specific software on a computer for post-processing and conversion to other formats, such as JPEG. The JPEG format is a widely supported image format that can be displayed and used directly on a variety of devices. Therefore, choosing which format to use needs to be weighed based on specific needs and usage scenarios.

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