Rendering:
1. Open the original image, ctrl+J to copy one layer, execute Image-Adjustment-Levels-Automatic Levels, or use the shift+ctrl+L shortcut key to execute Automatic Levels
2. Create an optional color adjustment layer and set the parameters as shown in the figure:
Get the following effect:
3. Create a hue/saturation adjustment layer and use the eyedropper tool to absorb the color of the grass behind the character. You can also directly select the red channel to adjust. Set the parameters as shown in the figure:
