What does raw photo mean?

Raw photos refer to unprocessed and uncompressed photo formats; because the original meaning of raw is "unprocessed", it can be understood as "RAW images are captured by CMOS or CCD image sensors. The light source signal is converted into the original data of the digital signal."

The operating environment of this article: Windows 7 system, Dell G3 computer.

RAW’s original meaning is “unprocessed”. It can be understood that a RAW image is the raw data in which a CMOS or CCD image sensor converts the captured light source signal into a digital signal.

RAW file is a kind of raw information that records the digital camera sensor, and also records some metadata generated by the camera shooting (Metadata, such as ISO settings, shutter speed, aperture value, white balance, etc.) document. RAW is an unprocessed and uncompressed format. RAW can be conceptualized as "original image encoding data" or more vividly as "digital negative". The full name of RAW format is RAW Image Format, which is called original in programming.

　1. RAW files are almost information obtained directly from CCD or CMOS without processing. Through post-processing, photographers can maximize their artistic talents.

　2·RAW files do not have white balance settings, but the real data has not been changed, which means that the author can adjust the color temperature and white balance arbitrarily without any loss of image quality.

　2·Color linearization and filter row transformation are processed more quickly on computers with microprocessors, which allows the application of some more complex algorithms that are not allowed on cameras.

　3·Although RAW files are accompanied by saturation, contrast and other mark information, their actual image data has not changed. Users can freely make personalized adjustments to a picture without having to base it on one or two preset modes.

　4·Perhaps the biggest advantage of RAW is that it can be converted into 16-bit images. That means there are 65,536 levels that can be adjusted, which is a big advantage for JPG files. This is very important when editing an image, especially if you need to make important adjustments to the shadows or highlights.

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