Search for black and white points in the photo

From this tutorial you will learn how to quickly find black and white points for image correction with the tool. Curves (Curves) or Levels(Levels).

When correcting the color balance, it is very important to correctly find the points corresponding to the lightest and darkest areas of the image. To do this, you can use the palette Info (Info) by moving the cursor over the image and observing the color values. But this method is laborious and inaccurate.

Now we will learn how to quickly find and mark the areas of black and white, and you will be able to correct your photos very quickly and easily.

Step 1.

Open our photo.

Create an adjustment layer Isogelium (Threshold), for which we click the mouse on the icon  at the bottom of the layers palette and select Isohelium from the drop-down list.

Step 2.

Shift the slider to the extreme left position. As a result, the image becomes completely white.

Step 3.

Now we gradually move the slider to the right, until a small number of pixels appear. So the areas corresponding to black color will appear.

Step 4.

Now put a mark on the black area. To do this, without closing the dialog box, move the cursor, which took the form of a pipette, to this area. Hold down the SHIFT key and click on it. The result will be a checkpoint label. Do not close the dialog box, that is, do not use the command, otherwise for the next operation you will have to open it again. Why waste precious time?

Step 5.

Now we define the areas corresponding to the white color. Move the slider all the way to the right, then slowly move to the left until a small number of pixels appear. These will be areas of white.

Guess what next? Right! Just as with the black search, we mark this point by clicking the mouse while holding down the SHIFT key. Now we have two points: the black point and the white point.

Step 6.

Now you can close the dialog box and remove the adjustment layer, it is no longer needed. To do this, drag it to the trash can icon in the layers palette.

Step 7.

Now create an adjustment layer. Curves (Curves) or Levels (Levels). Select the White Point tool and click on the marked area of ​​the image corresponding to the white color. Then select the black point and perform the same operation. That’s what happened with me.

I will not dwell on the correction process, as the lesson, which describes in detail about the curves, is in the section “Working with Photos”. Here is the link!

I wish you all creative success!

Like this post? Please share to your friends: