I opened a Taobao and wanted to do amateur photography. I bought a SLR and took a sock in the studio. The background color is white cardboard.

The overall color of the photo is not correct, but the white balance is not accurate, so you can adjust it with the color card.

Now all you need to do is take a picture with a gray card-you have to take it again every time the lighting environment changes or the shooting location changes. You can let the model hold the gray card by herself or put it near the subject.

After the photos are uploaded to the computer, first load the photos in the same lighting environment in Camera RAW (a plug-in for Photoshop to process raw files), then find the one with a gray card (usually the first one), select the white balance tool from the top toolbar, and click the gray card in the photo.

Now the software will automatically adjust the white balance and calibrate the photo color. Now all you need to do is synchronize the same settings to all other photos (in the same lighting environment). A very convenient and quick method is also suitable for Lightroom.

When the background color turns black, the landlord's metering mode must be global metering, and the background color is white cardboard. SLR metering will think that the overall light is bright and will automatically reduce the exposure, so the picture will be dark. It is suggested to spot metering or manually operate the exposure compensation "white plus black minus".