The full name of HDR is the high dynamic range, which is called a high-resolution, high dynamic range graph (HDRI) or high dynamic range rendering (HDRR).
The dynamic range refers to the relative ratio of the highest and lowest values of the signal.
The current 16-bit integer format uses color values from "0" (Black) to "1" (white), but does not allow the so-called "over range" value, such as the color value of the high light where the metal surface is whiter than white.
With the help of HDR, we can use color values beyond the normal range to render more realistic scenes. In simple terms, the HDR effect has three main features:
1. The bright place can be very bright;
2. The dark place can be very dark;
3. The details of the bright dark part are very obvious.
The "HDR hue" in the Photoshop CS5 adjustment menu is a similar HDR-high contrast picture palette tool. Now let's take a look at the example operation.
Original artwork and Effect chart:
Photoshop tutorials are as follows: