![]() ![]() In this image, a value of between 1.5 and 2 created the most suitable result. Jump to the next step for some examples of how much sharpening to apply. Start to increase the Amount slider until the details in your image look well defined, crisp, and slightly unnatural. Understanding how this tool works will be useful to you in both laser engraved and printed photography.įrom the menu bar, click Filters > Enhance > Unsharp Mask, and set all the sliders to 0, or the lowest possible value.ĭrag a corner of the dialog box to make it bigger, and use the four-way cursor (found at the bottom right corner of the preview image) to move the preview to an important part of your image or an area of high detail like faces, hair, leaves, or flowers. This will introduce a gentle ‘S’ curve to the graph, pushing the middle grey tones lighter and darker.Īlthough the recommended adjustment to the curves tool is subtle, try experimenting by making more extreme changes to different points on the graph. Open the Curves Tool, and using your cursor, click and drag slightly up and down at the points indicated in the example below. Do this with the Curves Tool in the menu bar under Colors > Curves. Upping the contrast slightly on your image can also help improve engrave results. If your histogram already spans the full width of the window you can skip this step. You may need to clip away more or less, depending on the shape of your histogram. In this example, we’re clipping away the magenta areas. Click and drag the sliders under the histogram toward the center until they frame the main body of the histogram. If the main portion of your histogram doesn’t fill the width of the box, use the light and dark Input Level sliders in the Levels Tool to clip away the lightest and darkest pixels. Open the Histogram and the Levels Tool by clicking Colors > Info > Histogram and Colors > Levels from the menu bar at the top of the screen. To learn more about the Rectangle Selection Tool, visit the Gimp support pages here. In these cases, use the Rectangle Selection Tool to create a histogram of a small area. Images that have been cut from a background may affect the shape of the histogram. Here’s an example of an image and its histogram before and after the adjustment.Open the Levels Tool by clicking Colors > Levels from the menu bar at the top of the screen.Īdjust the Gamma Slider to alter your histogram until the majority of the data (illustrated by the black mountainous shape) is roughly centered within the window. The histogram is unique to each image so don’t worry if yours doesn’t look the same as these examples. The histogram displays the amount and distribution of light and dark areas, which helps us understand how to adjust the brightness for best results. ![]() Open the histogram by clicking Colors > Info > Histogram from the menu bar at the top of the screen. Each image is different and will need a slightly different adjustment to look its best.
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