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Laser Cutter/Instructions/Photo Engraving: Difference between revisions
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Laser Cutter/Instructions/Photo Engraving (view source)
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#You will want to reduce the image to greyscale for processing. [[File:Engraving_greyscale.png|300px]] | #You will want to reduce the image to greyscale for processing. [[File:Engraving_greyscale.png|300px]] | ||
#Any colour correction is best done at this stage while the image is still at it's original resolution. <br>For example, adjusting the contrast so that darker areas are much brighter so that you don't and up with large areas of entirely black wood. [[File:Engraving_curves.png|300px]] | #Any colour correction is best done at this stage while the image is still at it's original resolution. <br>For example, adjusting the contrast so that darker areas are much brighter so that you don't and up with large areas of entirely black wood. [[File:Engraving_curves.png|300px]] | ||
#Before engraving your image, you will want to specify the actual size you wish to engrave it and the resolution in DPI. <br>Changing 'pixels' to millimetres' in the dialog box allows you to do this; it will automatically adjust the number of pixels required. [[File:Engraving_imagescale.png|300px]] | #Before engraving your image, you will want to specify the actual size you wish to engrave it and the resolution in DPI. <br>Changing 'pixels' to 'millimetres' in the dialog box allows you to do this; it will automatically adjust the number of pixels required. [[File:Engraving_imagescale.png|300px]] | ||
#To produce the required dithering effect necessary to engrave colour gradients, you need to go to ''Image -> Mode -> Indexed...'' and use the settings pictured. [[File:Engraving_indexedcolour_dithering.png|300px]] | #To produce the required dithering effect necessary to engrave colour gradients, you need to go to ''Image -> Mode -> Indexed...'' and use the settings pictured. [[File:Engraving_indexedcolour_dithering.png|300px]] | ||
#You should end up with something like the effect shown here (''enlarge for detail on the dithering)'': [[File:Monalisa_600dpi_reducedbleeding.png|500px]] | #You should end up with something like the effect shown here (''enlarge for detail on the dithering)'': [[File:Monalisa_600dpi_reducedbleeding.png|500px]] | ||
#Finally, save the image as a .PNG file, either to a memory stick or the '''''space on colin -> /lasercutter''''' network share - supposedly you can import BMP and JPEG files but I've yet to see it complain about a PNG file. | #Finally, save the image as a .PNG file, either to a memory stick or the '''''space on colin -> /lasercutter''''' network share - supposedly you can import BMP and JPEG files but I've yet to see it complain about a PNG file. | ||
== Setting Up the Laser Cutter == | == Setting Up the Laser Cutter == | ||
