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How can I use a Roi in ENVI?
You can use ROIs for processing in some ENVI tools, such as to extract statistics for classification. To create and manage ROIs, click the Region of Interest (ROI) Tool button on the toolbar. When you define an ROI, you specify the pixels of an image that will be in or out of the ROI.
How are regions of interest used in ENVI?
Regions of Interest (ROIs) are selected samples of a raster, such as areas of water, that are identified for a particular purpose. You can use ROIs for processing in some ENVI tools, such as to extract statistics for classification.
How can I edit the geometry of a Roi?
A hole displays in the ROI. Press Enter a final time to accept and complete the multi-part, or right-click and select Accept Multi Part. To edit geometry ROIs, click the Go To arrow buttons at the bottom of the ROI Tool to navigate the individual records of the selected ROI layer.
How is a pixel included in a Roi?
When you define an ROI, you specify the pixels of an image that will be in or out of the ROI. For more information on the rules that determine when a pixel is included in an ROI, see the ROI Pixel Inclusion Background topic. ENVI performs a real-time orthorectification for ROI layers created on top of an RPC image.
How are Roi layers created on top of RPC images?
ENVI performs a real-time orthorectification for ROI layers created on top of an RPC image. The ROI layers will contain projected coordinates that can display with other projected imagery, and projected ROI layers will display on top of an existing RPC image without reprojecting the RPC image.
How to use the same ROI for multiple Landsat images in ENVI?
Luckily, there is a simple way to solve this: however, it relies on your images being accurately georeferenced. Trying loading the images into separate ENVI displays, and then create a geographic link between the windows (Tools->Link->Geographic Link). You should then be able to move around within the images and check that they line up properly.
How to open a higher level Landsat image with ENVI 5.2?
How to open a Higher Level Landsat image with ENVI 5.2? A mistake every time I try to open the .MTL archive. The error that appears says “File does not appear to be a valid TIFF file”. The archive’s size it’s smaller than it should be. Is there’s any plugin to open correctly the images?
Why are the values in the ENVI band wrong?
It is likely that the bad values are actually artifacts near the edge of the image, where some spectral bands may have information while others do not. That type of error can result in various values outside of the expected range.