. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 763 17.9.4 GEGL graph . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 765 17.9.5 Normal “Intelligent Scissors Select tool” lets you select a freehand border and uses edge-recognition algorithms to better fit the border around the object. Use this when the subject is complex but distinct enough Exposure Exposure defines how much the tool effect will be strong, as a more or less exposed photo- graph. Default slider is 50 but can vary from 0 to 100. 14.4 Transform Tools Figure 14.111 An overview

a visual graph, a histogram, of the intensity value of the active layer or selection. You can set the threshold range either using the input boxes or clicking button 1 and dragging on the graph. It allows Converting a two-dimensional selection mask into a one-dimensional path involves some rather tricky algorithms: you can alter the way it is done using the Advanced Options, which are accessed by holding down from 0.0 to 1.0. Plot a graph of the settings By clicking on this large button, you can open a window that displays the graph of hue present settings. Figure 15.255: Function graph of present settings Saturation

the de facto standard scripting language for CGI scripts. There are literally thousands of Perl algorithms and functions that you can use for image manipulation in your scripts. You can even use Gimp as TONAL CORRECTION We have already discussed tonal correction to some extent in the previous para- graph. We mentioned that setting the gamma value to the correct value according to your monitor isn’t always applying Cubism to several layers with dif- ferent modes over the original image. GAG Genetic Algorithms for Gimp, or GAG, is a pattern-generating Render filter like right-click|Filters|Render|Qbist.

– Useful to display a Logarithmic histogram so that values aren’t hidden at the bottom of the graph Colour Levels Display Logarithmic Histogram The middle handle will adjust the midpoint of the