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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.

cabin original image   Lucis image
1. Original Image. I used Image > Adjust > Desaturate in Photoshop to create this image.
 
2. Lucis image with the same settings for each RGB channel. Enhance Detail slider = 125 and 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, and Blue: Enhance Detail sldier = 77, Smooth Detail slider= 1

 

  cabin enhnaced with Lucis
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 image   Lucis image

4. Extreme Lucis Image. The Smooth Detail slider was set to 1 for each channel. The Enahnce Detail sldier was 55 for Red, 55 for Green and 19 for Blue.

 

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.
     
Image of a tree where the blue channel is enhanced more.   image of a ttree where the red channel is smoothed more than the other channels
6. Lucis image where the Blue Channel is enhanced more than the other two channels. The Smooth Detail slider = 1 for each channel, the Enhance Detail slider = 119 for both the Red and Green Channels and = 63 for the Blue Channel.   7. Lucis image with the Red Channel smoothed more than the other two channels. The Smooth Detail slider = 63 for the Red Channel and = 1 for both the Green and Blue channels. The Enhance Detail slider = 199 for all three channels.
Image of a tree with the enhnace detail slider different for all three channels.   Lucis enhanced image of a tree wiht the grren channel enhanced more than the red channel.
8. Lucis image with the Enhance Detail slider different for all three channels. The Smooth Detail slider = 1 for all channels. the Enhance Detail slider = 203 for the Red Channel, 139 for the Green Channel and 119 for the Blue Channel.
 
9. Lucis image with the Green Channel enhanced more than the Red and Blue Channels but also all channels enhanced less than 119. The Smooth Detail slider = 1 for all three channels. The Enhance Detail slider = 203 for both the Red and Blue Channels, and = 125 for the Green Channel.
original image of some poppies   Lucis processed image of some poppies.
10. Original image of some poppies.
 
11. Lucis image with the Green Channel enhanced more than the other two and the image was partially color corrected. The Smooth Detail slider = 1 for all three color channels. The Enhance detail slider = 147 for the Red and Blue Channels and = 39 for the Green Channel. 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.
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