When shooting, two formats, cr2 and jpg, were saved and shot in black and white style. Why is jpg black and white and cr2 color?

CR2 file is an extension of RAW file format of Canon camera, and RAW file is the original image data that has not been processed, compressed or modified. Because CR2 files contain uncompressed original pixel data, they can provide higher image quality and more adjustment options than JPEG files.

When you convert a CR2 file into a JPEG file, the camera usually applies the default color space and color saturation, which may cause color changes. In addition, JPEG files are also lossy compression, in order to reduce the file size, some image details will be lost.

For black-and-white photography, black-and-white mode is usually used, or color images are converted into black-and-white images in post-processing. If you choose the black-and-white style when shooting, but save two formats, CR2 and JPEG, it is likely that you only use the black-and-white mode when shooting, and use the default color space and saturation in the JPEG file saving settings.

Therefore, to ensure that JPEG files are also black and white, it is necessary to select the black and white mode in the JPEG file saving settings, or convert the color image into black and white mode in post-processing.