Black and White Mode
The Black and White dither pattern is a thresholding pattern that thresholds at 50% black. Each
pixel in a grayscale image that is greater than 50% black will be converted into black and each
pixel that is less than 50% black will be converted into white. This dither pattern will not give good
results for reproducing photographs, but is very useful when printing images that should be black
and white yet may have some unintended grayscale pixels in them. A good example is a scanned
image of a text document that was scanned into a computer using a grayscale scanner setting.
Ideally the scanned image of text should be black text on a white background, but if a grayscale
scanner setting was used there may be very light gray pixels at the edges of the characters of
text. This dither pattern will remove those gray pixels.
Helpful Tip
Laser marking or engraving grayscale or color bitmaps onto materials requires a bit of trial and
error to achieve good results. Results will vary on different materials. As a rule of thumb, use an
Image Density setting of 5 using halftone or diffusion pattern on harder materials where you are
marking the surface. Use an Image Density setting of 3 using the halftone or diffusion pattern for
softer materials where you are engraving into the material.
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Summary of Contents for VLS2.30
Page 1: ...VLS Desktop User Guide VLS2 30 VLS3 50 www ulsinc com Revision 2012 08...
Page 5: ...Chapter 1 Specifications 5...
Page 8: ...Chapter 2 Safety 8...
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Page 15: ......
Page 16: ......
Page 19: ...Chapter 3 Installation 19...
Page 36: ...Chapter 4 Operation 36...
Page 62: ......
Page 68: ...Chapter 5 Accessories 68...
Page 80: ...Example Connection for PNP mode Example Connection for NPN mode 80...
Page 92: ...Chapter 6 Maintenance 92...
Page 99: ...www ulsinc com...
