Adobe illustrator 10 Manuale Utente
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Adobe Illustrator Help
Working with Bitmap Images
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of tiles for the width. Choosing Height calculates the appropriate number of tiles to use
for the height of the mosaic, based on the original number of tiles for the height.
for the height of the mosaic, based on the original number of tiles for the height.
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To have the result appear as a color or grayscale image, select Color or Gray.
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To change the size of the image by percentages of width and height, select Resize Using
Percentages and enter new percentages in the Width and Height text boxes.
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To delete the original bitmap image, select Delete Raster.
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To make tiles square, using the number of tiles specified in Number of Tiles, click Use
Ratio.
4 Click OK.
Using the Photo Crosshatch filter
The Photo Crosshatch filter can convert a photographic image, or any rasterized image,
into a hatched ink pen image. The filter converts the photo into a series of overlapping
hatch layers, each hatch layer representing different lightness areas of the original photo.
Since there are many hatch layers overlapping where the image is darkest, and few where
the image is lightest, the result is a simulated crosshatched drawing of the original photo-
graphic image.
into a hatched ink pen image. The filter converts the photo into a series of overlapping
hatch layers, each hatch layer representing different lightness areas of the original photo.
Since there are many hatch layers overlapping where the image is darkest, and few where
the image is lightest, the result is a simulated crosshatched drawing of the original photo-
graphic image.
Note: You can apply various hatch filters to images, to give the image the appearance of a
pen drawing. (See
pen drawing. (See
To convert a rasterized image into a crosshatched drawing:
1 Select a rasterized image.
2 Choose Filter > Pen and Ink > Photo Crosshatch.
3 Enter the number of hatch layers to create in the Hatch Layers text box. The maximum
number of layers is 8. Each hatch layer receives a distribution of the lightness values
between 0 and 255. For example, if you enter a Hatch Layer of 4, the first layer contains
lightness values of 0 to 64, the second values of 0 to 128, the third values of 0 to 192, and
the fourth values of 0 to 255.
number of layers is 8. Each hatch layer receives a distribution of the lightness values
between 0 and 255. For example, if you enter a Hatch Layer of 4, the first layer contains
lightness values of 0 to 64, the second values of 0 to 128, the third values of 0 to 192, and
the fourth values of 0 to 255.
4 Use the slider under the histogram to adjust the weighting of the threshold levels
toward light or dark. The histogram shows how many pixels of the hatched image fall into
each value of lightness between 0 and 255. Use the middle slider to skew the threshold
levels on each level toward light (by moving the slider to the right) or dark (by moving the
slider to the left). Adjust the end sliders to moderate the highest levels of light (the
rightmost slider) and dark (the leftmost slider).
toward light or dark. The histogram shows how many pixels of the hatched image fall into
each value of lightness between 0 and 255. Use the middle slider to skew the threshold
levels on each level toward light (by moving the slider to the right) or dark (by moving the
slider to the left). Adjust the end sliders to moderate the highest levels of light (the
rightmost slider) and dark (the leftmost slider).
5 Use the sliders on the left side of the dialog box to adjust options as follows:
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Density adjusts the number of hatch elements applied to the selection, from .5 pt to
10 pts.
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Dispersion Noise controls the spacing of hatch elements, from 0 to 300%.
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Thickness controls the stroke weight of the hatch elements, from .1 pt to 10 pts.
(This option is dimmed if the selection is unstroked.)
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Max. Line Length sets the length of the hatch elements, from 5 pts to 999 pts.
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Rotation Noise sets the amount of random rotation of objects within the hatch layers,
from –360 degrees to 360 degrees.