Photoshop Color tips: Find the black and white gray field in the photo

In the color correction of digital photos, how to accurately find the black and white gray field in the image is a key step. This article will introduce a fast and convenient technique, as long as the image of black and white gray, we can use this method to help you quickly and accurately find black and white gray field. Note that this method is not omnipotent, because not all images have black and white gray fields. But as long as it has, we can quickly find it.

This is a photo taken by a family entry-level digital camera, and we use the color calibration to see how to find the black, white and gray fields.

Before color correction

After color correction

Find the Black field.

1, open the need to correct the color of the photos. Click the "Create new fill or adjust Layer" button at the bottom of the layers panel to select "Threshold" from the pop-up menu, and in the "Threshold" dialog box, drag the slider to the left, where the image is blank. Slowly drag the slider to the right, and you will see the black pixels coming up. The first black pixel area that appears is the darkest part of the image, the Black field. By clicking on the "OK" button, Photoshop adds an adjustment layer.

Figure 1

Figure 2