With this effect filter you input a threshold value, above which brightness the color values are reversed (middle picture, threshold value 70%). These phenomenon were used for artistic production of pictures. Similarly, entry of light during the developing process reverses the brightness values. If the location of the photograph is extremely highly lit, you can experience a reversal of color and brightness. Solarization was originally a photochemical effect. This filter tends to make the picture also a little more smooth. The amount of picture information does not increase, but because there are not so many contrast changes our brains can better recognize the resulting graphic. The filter reduces noise, in which every pixel is compared with its neighbors, and the extreme values (those that deviate in color by a large amount from a mean value) are replaced by a pixel with a mean color value. The effect will be strengthened if you apply the filter several times in a row. Sharpen increases the contrast between neighboring pixels, emphasizing the brightness difference.
If you use the filter several times in a row, the effect will be strengthened. Smooth reduces the contrast between neighboring pixels and produces a slight lack of sharpness. The colors of an image will be inverted (reversed) so that it appears as a color negative of the image.
Filters always apply to the entire graphic – it is not possible to use filters to edit only a part of the object. A filter works on the current view of an object and they can be combined. With the Filter tool ( icon) you can open the filter toolbar.
Graphic filter toolbar Graphic filter toolbar Get what is the effect of smooth graphic filters in openoffice writer? from screen.
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