Wide's World

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Basic Image Solarization

Last week at Wide's World we looked at a basic manipulation where two image layers, both positive and negative, were essentially blended togther to create an interesting visual effect. This week we will look at the process of solarization, where the partial reversal of an image from positive to negative is achieved to render yet another interesting visual effect. Again, experimentation is key in discovering a variety of possibilities. We will look at the basic manipulation using our image editor.

Tools from the toolbar
You will need the eyedropper tool for a portion of this exercise. By selecting this tool and clicking in your image area, you will notice that it makes the foreground swatch in the toolbar change to the color clicked on by the eyedropper. This is very useful for picking a color from an image's actual range of color.

Solarizing Images
This effect was discovered accidentally when film was briefly exposed to light during development. We will see how we can alter our adult content using this simple manipulation for a varied range of applications.
1. Select File -> Open and locate an image from your local drive, etc. with which to apply the effect.
2. Select Image -> Mode and choose Grayscale from the submenu.
3. Select Image -> Adjust and choose Curves... from the submenu or select CTRL/COMMAND + M to bring up the curves control window.

By clicking the arrows below the curve graph (circled in red above), make sure the bar goes from white to black, reading from left to right. Clicking the arrows in the bar causes it to invert.
4. Select the pencil tool in the curves control window (indicated in red square in figure above) and try drawing a curve yourself. If the preview radio button is selected you will see what happens in your image's document window. To make straight lines just click on a defining point, hold the shift key and click to another point. Another method is to simply click to define points on the default curve and move them around. Below is the curve applied for the example used. In this example we tried a fairly simple curve adjustment. If you experiment with curves you will see how different curves will affect the outcome.

5. Select the eyedropper tool from the toolbar and drag over the image and find a sample of a gray medium tone.
6. Select Image -> Mode and choose RGB from the submenu to convert the image back to RGB color.
7. Select Image -> Adjust and choose "Hue/Saturation..." from the submenu or select CTRL/COMMAND + U to bring up the Hue/Saturation/Lightness control window. Click to turn on the "Colorize" and "Preview" radio buttons and play with the three sliders to achieve the desired effect.

We did it a couple of different ways to illustrate some different results.

8. Save your work and do with it what you will.

Thanks for stopping through Wide's World. We hope you enjoy our adventures in image fun. Remember, if you try different things you will get varied results and your skills will be honed like a pro! Until next time, Happy Webmastering!

Reference/Useful Links

Solarizing with the GIMP - Even the GIMP has curves.

 
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