Gray Iso-Layers fr.alexp.grayisolayers 16 0 true true 1.0 true 800 0.02 0.4 true 0 100 Each setting carries a number: the examples below show, under the same number, what it does for several values. images/depth_en.png The estimate runs on the graphics card when possible and is kept in a cache: only the first run on an image takes a few seconds. 4294967295 0.2 4278190335 255 65535 true images/parameters_en.png Select one or more bitmap images (imported photo, height map, blurred noise), then run the extension. Colors are read as grays and transparency as white. The image is smoothed, then split into the requested number of gray levels with evenly spaced thresholds. Each level becomes one closed path that follows the edge of its flat area, like a contour line on a map. Each gray level goes into its own layer, named Board no. 1, Board no. 2... from the back to the front, added above the image: as many new layers as gray levels. The boards are meant to be cut and stacked: board no. 1 covers the whole image and each following board is smaller and lies in front of the previous one, lightest (or darkest) in front. In each layer, the cut outline of the board is drawn in the cut color (red), and the outline of the next board is carried over in the marking color (black), to show where to glue it. With the board numbers, drawn in the number color (blue), each board carries its own number in a frame and each marked area carries, without a frame, the number of the board to glue there; both sit under the next board, so no number shows on the glued stack, and the top board carries none. With "Its own gray only", a board holds the flat area of its gray alone: the flat areas tile the image without overlapping and carry no marking. Several selected images share the same layers. With the boards side by side, each board is moved into its own cell of a grid to the right of the image, with its marking, so that every board can be seen and cut on its own. For a relief that follows the real volumes of a portrait rather than its light and shadows, raise the depth map share (Depth tab): at 100, the boards follow the volumes, and the fine details setting carves the eyes and the mouth into them. A depth map made elsewhere (8 or 16 bits) can also be imported and selected like any image, with a share of 0. In both cases, if most boards come out empty or the subject only gets a few of them, raise the level distribution. For laser cutting, choose no fill: only the cut and marking strokes remain. For line art only, choose a white single-color fill, or no fill, with a black stroke and no marking. If the outlines are too busy, raise the smoothing or the smallest island; if they look angular, raise the smoothing or the simplification. If a face is no longer recognizable, lower the smoothing and keep "Preserve edges" checked.

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