Contour Plotting

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This brief describes the contour plotting capabilities of Mira MX x64, Mira Pro x64, Mira Pro Ultimate Edition, and Mira Pro. Contour plots show levels of constant intensity or luminance in an image, much like a topographic map. With Mira, there is no limit to the size of image, or the data type (8 to 64 bits per pixel). Up to 100 levels may be contoured in multi-contour mode or you can "click to contour" at a single curve at a target luminance level. Adjustable contour stiffness selects between showing full detail and excluding noise — essential for analyzing low S/N data. You can adjust the number of contours, change the colors, and choose auto-levels or contours at specific levels of your choice. Contour plotting is available in Mira Pro and Mira MX and the Ultimate Editions of each.

These examples show contours plotted on a grayscale image before and after applying a pseudo-color palette enhancement. Notice how the contour tracks luminance changes revealed so well by the pseudo-color palette. However, they don't show exactly the same thing. Contours trace through luminance values at the sub-pixel level, considering neighboring values, whereas palettes select only the pixel values as literally defined in the image.