![]() ![]() ![]() Choose File > Open., navigate to your Week 2 folder or directory, and open the lake_mead_2004_color.jpg image that you downloaded in the Intro to ImageJ section.On your desktop or by clicking its icon in the dock (Mac) or Launch Bar (Win). Launch ImageJ by double-clicking its icon.In this section, you will learn how to spatially calibrate digital images. Pixel values can represent temperature, elevation, salinity, population density, or virtually any phenomenon you can quantify.īefore you can make meaningful measurements, you need to calibrate the image that is, "tell" the software what a pixel represents in real-world terms of size or distance ( spatial calibration), in terms of what the pixel values mean ( density calibration), or both. These involve the first two dimensions of the image, its width and height.ĭensity measurements Measurements involving the third dimension, the pixel values. Spatial measurements Measurements of distance, area, and volume. The power of image processing is its ability to make measurements in these dimensions: You also learned about the three dimensions of an image width, height, and bit depth. In the Intro to ImageJ section, you learned that a digital image is a string of numbers, displayed in a rectangular array, according to a lookup table. ![]() Top of page Getting to Know Measuring in ImageJ Select What You Want to Measure (Set Measurements) ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |