How do you stretch a histogram in ArcGIS?
Click the Interactive Histogram Stretch button . If you have a 1-band (grayscale) display, then you will view one histogram. If you have a 3-band (RGB) display, then you will view three histograms. Use the sliders (1), or type in the values (2) to adjust the minimum and maximum values for each band.
How to use histogram to create a raster layer?
Right-click the raster layer in the table of contents or Catalog window and click Properties. Choose a stretch type and click the Histogram button. The Histograms window is opened for your raster layer, allowing you to interactively use the tools described above to modify the stretch.
When to use minimum or maximum stretch in raster?
You might use the Minimum–Maximum stretch to spread out tightly grouped values. The Histogram Equalize and Histogram Specification stretches obtain their values from your histogram manipulation. A two-standard deviation stretch is often used to brighten raster datasets that normally appear dark.
How does the stretch function in ArcGIS work?
Stretching improves the appearance of the data by spreading the pixel values along a histogram from the minimum and maximum values defined by their bit depth. For example, an 8-bit raster dataset or mosaic dataset will be stretched from 0 to 255. Different stretches will produce different results in the raster display.
How does the histogram of a raster stretch work?
When the preset contrast stretches do not produce the enhancement you want, histograms can be manually adjusted to change the contrast stretch of the raster. The histogram of the contrast stretch shows you the distribution of the image pixels. The pixel values are along the x-axis, and the pixel counts are shown on the y-axis as a histogram.
Which is the stretch type in ArcGIS help?
The Standard Deviation stretch type applies a linear stretch between the values defined by the standard deviation (n) value. The Percent Clip stretch type applies a linear stretch between the percent clip minimum and percent clip maximum pixel values defined.
How does percent clip stretch work in ArcGIS?
The Percent Clip stretch type applies a linear stretch between the percent clip minimum and percent clip maximum pixel values defined. When you use either of these stretch types, all the values in the histogram falling outside the values defined will be pushed to the ends.