Turning on pass-through is useful if you have an image that is dithered outside of LightBurn, using software like PhotoShop, PaintShop, Photograv or One-Touch photo. This option tells LightBurn not to perform any resizing or resampling of the image, which it does by default. How many times to repeat the entire engraving process. The LightBurn icon is shown below using in both diffusion and ordered dithering. Ordered dithering does not have this issue, so it works better for "solid filled" images, like cartoons or logos. If you have an image with large areas of solid black or white, there's nowhere for this error amount to get absorbed (black and white are always exact), so it keeps pushing it further and further, and you sometimes end up with strange lines or tendrils in your picture. When those neighbors are computed, that error amount is factored in. Diffusion dithering works by remembering how "off" a given pixel was, and smearing (diffusing) that difference around over neighboring pixels. The original image (Madrid truck):ĭithering is attempting to use 2 colors (black and white) to approximate continuous shading, and it has its limits. This also approximates shading with simple dots, but does so without evident patterning, and tends to produce more subtle shading. Dithered: Also called error diffusion dithering, this is the best choice for smoothly shaded images, like photos.This is ok for general use, but works best for images with large areas of solid fill, where diffusion dithering can cause unwanted artifacts (see below). Ordered: Also called ordered dithering, this is a step above threshold for grayscale images, and uses densely packed on/off dots to approximate shading, using an ordered/regular grid pattern.
Don't use this mode for grayscale or color images. This should only be used for images that are two-color black/white to begin with, like an image you dithered outside of LightBurn. Threshold: a simple on / off switch if the image is dark / bright at a given location.Image ModeĬhanging the image mode will change the algorithm used to prepare the image for engraving. DPI (dots per inch) is just 25.4 / interval. See Line Interval under Operations Scan AngleĬontrols the pixel density of the output - this is simply another way of representing line interval that is more intuitive for some. See Overscanning under Operations Line Interval This is useful for engraving slate or glass, where burned areas become lighter. This will invert your image during engraving. See Bi-Directional Scanning under Operations Negative Image Modeĭisabled for raster images Bi-Directional Scanning If your image does not have absolute black or absolute white then it will not ever fire at the min/max settings. Increasing this value beyond your lasers firing threshold will allow the laser to fire for absolute white.Ī note on Min/Max power: This scale affects the entire range from white to black. The minimum power of the laser for pure white. Setting this to a lower value will decrease the power of the laser when engraving absolute black. jpg and jpeg (Joint Photographic Exports Group)ĭouble click on the cut layer in the Cuts tool window to launch the Cut Settings Editor window.LightBurn has the ability to engrave raster images (photo engrave) without additional effort.
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