Technique #7

Tinted Grayscale Images

If you desaturate a color image (or open a grayscale image and change the mode to RGB), then each RGB channel has the same contrast information. When you open such an image in Lucis and then select Split Channel mode, you can alter each RGB channel separately. Since the contrast information in each channel is no longer the same, the composite image will have areas of color. This is very fun to play with. Below are some examples showing the Lucis settings. I have chosen to show more extreme examples so the image processing is clear. Of course these effects may be made much more subtle.

If you enhance two channels the same you tend to get more primary colors. The colors will vary more if you enhance all the channels a little differently. You can use the Mix With Original Image slider to decrease the colors.

Click on any image to see a high resolution version.

Lucis Pro Image

1. Original Image. I used Image > Adjust > Desaturate in Photoshop to create this image.

Lucis Pro Image

2. Lucis image with the same settings for each RGB channel.

Enhance Detail slider = 125 for each RGB channel.
Smooth Detail slider = 1 for each RGB channel.


Once you have given each RGB channel the same settings, then click on View Composite and start to vary the sliders.

3. Lucis image (right) with the settings:

Red: Enhance Detail slider = 125, Smooth Detail slider = 1
Green: Enhance Detail slider = 93, Smooth Detail slider = 1
Blue: Enhance Detail slider = 77, Smooth Detail slider = 1

This image had the black in the windows. Lucis will reveal details in those black areas if I really increase the detail. As an experiment I created the image below and to the left, then mixed it with the original image to create the image below and to the right.

Lucis Pro Image

4. Extreme Lucis Image.

Red: Enhance Detail slider = 55, Smooth Detail slider = 1
Green: Enhance Detail slider = 55, Smooth Detail slider = 1
Blue: Enhance Detail slider = 19, Smooth Detail slider = 1

Lucis Pro Image

5. Mixed Image. Combined 60% of the original image with 40% of the extreme Lucis image.

Below are some variations and the Lucis slider settings to give you an idea of some of the possible color shifts.


Lucis Pro Image

6. Lucis image where the Blue Channel is enhanced more than the other two channels.

Red: Enhance Detail slider = 119, Smooth Detail slider = 1
Green: Enhance Detail slider = 119, Smooth Detail slider = 1
Blue: Enhance Detail slider = 63, Smooth Detail slider = 1

Lucis Pro Image

7. Lucis image with the Red Channel smoothed more than the other two channels.

Red: Enhance Detail slider = 199, Smooth Detail slider= 63
Green: Enhance Detail slider = 199, Smooth Detail slider = 1
Blue: Enhance Detail slider = 199, Smooth Detail slider = 1

Lucis Pro Image

8. Lucis image with the Enhance Detail slider different for all three channels.

Red: Enhance Detail slider = 203, Smooth Detail slider = 1
Green: Enhance Detail slider = 139, Smooth Detail slider = 1
Blue: Enhance Detail slider = 119, Smooth Detail slider = 1

Lucis Pro Image

9. Lucis image with the Green Channel enhanced more than the Red and Blue Channels but also all channels enhanced less than 119.

Red: Enhance Detail slider = 203, Smooth Detail slider = 1
Green: Enhance Detail slider = 125, Smooth Detail slider = 1
Blue: Enhance Detail slider = 203, Smooth Detail slider = 1

Lucis Pro Image

10. Original image. The original is by Rowen Chestnut on Unsplash. Lucis image by Gary Gaugler.

Lucis Pro Image

11. Lucis image with the slider settings very varied in the three channels.

Red: Enhance Detail slider = 71, Smooth Detail slider = 19
Green: Enhance Detail slider = 135, Smooth Detail slider = 27
Blue: Enhance Detail slider = 117, Smooth Detail slider = 35

This creates a sculptured look with red and green emphasized. The shadow on the nose was too strong and was diminished. This image is in the Art Gallery.

Lucis Pro Image

12. Original image of some poppies.

Lucis Pro Image

13. Lucis image with the Green Channel enhanced more than the other two and the image was partially color corrected.

Red: Enhance Detail slider = 147, Smooth Detail slider = 1
Green: Enhance Detail slider = 125, Smooth Detail slider = 1
Blue: Enhance Detail slider = 147, Smooth Detail slider = 1

Then I used the Assign Original Image Color slider to assign 60% of the original image's color to the Lucis image. This toned down the image.