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| <div class='klayout-generated-doc'><p class="navigator"><b>KLayout Documentation (Qt 5): </b><a href="../index.html">Main Index</a> » <a href="index.html">KLayout User Manual</a> » <a href="basic.html">KLayout Basics</a> » Adding Images</p><h1>Adding Images</h1><a name="k_1"></a><p> |
| For some applications it is necessary to show flat pixel data together with |
| the layout. That can either be a SEM image taken or some output of a |
| simulation tool. KLayout provides a way to add images to the display |
| and show them below the drawn layout. |
| </p><p> |
| Currently, images can be read from any commonly used image format available |
| in Qt (i.e. PNG, JPG, TIF ...). Color and monochrome images are supported. |
| Internally an image is stored as a matrix of float values and it is possible |
| to write custom importers using RBA. |
| </p><p> |
| To add an image, use the "Add Image" function from the "Edit" menu. |
| An image property dialog will appear where the image can be specified. |
| Choose an image using the "Browse" button next to the file name box. |
| </p><p> |
| An image has a variety of properties which mainly affect the way it is |
| displayed: |
| </p><ul><li><b>Pixel size:</b> The size of one pixel in micron units. This affects the total size of the image.</li><li><b>Center:</b> This is the point where the center of the image is placed (in micron units).</li><li><b>Rotation:</b> An arbitrary angle by which the image is rotated.</li><li><b>Shear/Perspective Tilt:</b> shear and perspective tilt angles. Although it is possible to specify these |
| angles explicitly it is far easiert to use the landmark adjustment feature to align an image with a layout.</li><li><b>Mirror flag:</b> If this option is checked, the image is mirrored at the bottom edge before it is rotated.</li><li><b>Pixel value range:</b> The pixel value corresponding to minimum and maximum. For normal 8 bit image formats, |
| these values are 0 and 255. They can be adjusted which allows brighten or darken images. For float images (i.e. |
| simulation data), this value should reflect the bounds of the output values, i.e. 0.0 and 1.0 for normalized data.</li><li><b>Color mapping:</b> For monochrome images, the values are converted to colors with a mapping function. |
| The image properties page contains a tab for specifying an arbitrary mapping of data values to colors. |
| This is achieved by placing color sample points on the data range axis and assigning colors to them. Double click at |
| the axis to set new points, click on them to select them and adjust their color with the color box. Select |
| and press "Del" to delete a sample point.</li><li><b>Brightness, Contrast and Gamma:</b> Three sliders for changing these values are provided on the respective tab.</li><li><b>RGB channel gains:</b> Additionally, each color channel can be weighted with a given factor on the respective tab.</li></ul><p> |
| Once an image is placed, it can be moved and resized using the "Move" function. |
| The images properties can be adjusted using the "Properties" function from the |
| Edit menu or double-clicking at the image. |
| </p><p> |
| With KLayout 0.22, it is possible to define landmarks which can be set at arbitrary positions in the image and |
| aligned with corresponding layout features by dragging them to the desired target location. See <a href="landmarks.html">Using Landmarks To Align Images</a> for |
| details. |
| </p><p> |
| An arbitrary number of images can be placed on the layout view. To store the setup, save the |
| session using the "File/Save Session" function. |
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