The area of the selection can be displayed as the number of pixels or in units of acres, Use the popup menu on the left side of the coordinate view to select the map units. If map coordinate information exists for the image, one can display the coordinates as map Window->Show Coordinate View menu item in the Macintosh version]. View->Coordinate View menu item in the Windows version of MultiSpec [or select the Present the cursor (mouse) location and selected areas in the image. One can also display a “coordinate view” along the top of the image to Redisplay the 3-channel image with channels 3, 2 and 1 as Red, Green and Blue.ġ.7 Coordinate View. One can then verify that the selected area Selected area will be drawn in all of the channels. To do this, select an area in one channel near a field intersection. In other words, the same location in the image is at the same pixel location in allĬhannels. The side-by-side channel display is a good way to verify that the channels are registeredĬorrectly. Note that the vegetation areas in channel 3 are brighter The above image window will be displayed (after zooming out) which shows all threeĬhannels displayed side-by-side. Then selectĭisplay Type “Side-by-Side Channels”, and select OK to display all three channels in the Processor menu, select Display Image… to bring up the display dialog box. Clear selection usingġ.6 Next one can view a side-by-side channel display for data quality inspection. Image, any zooming will be centered on the selected area if possible. Select a rectangle, and then releasing the left mouse button. One can make a selection within the image by left click-hold in the image window, drag to (Note that one uses the ‘Option’ key on the Macintosh version to In other words, the zoom factor will change from 1.0 to 1.1 to 1.2Įtc. Some other options are to hold the ‘Ctrl’ key down while zooming to change the zoom stepįactor to 0.1 instead of 1. The current zoom magnification is displayed along the bottom of the MultiSpecĪpplication window in the box labeled “Zoom=”. This button allows one to go to X1 magnificationĭirectly. Just to the left of the image zooming buttons is another button Zooming buttons allowing one to zoom in (large mountain) or out (small mountain) from Toolbar there are two small boxes with large and small “mountains”. Notice that just above the image window in the sta file or save to a different location.ġ.5 The image of the data will now appear. sta file already exists with the default name, a dialog box will be presentedĪllowing you to overwrite the existing. Saved to a file named “ag020522_DPAC_cd.sta” so that they will not have to be recomputed The default options built into this dialog box are satisfactory, soĪfter the histograms of all of the channels have been computed, the information will be sta file), another dialog box will be presented allowing theĬhoice of regions to be histogrammed, so that the channel data values can be properlyĪssigned to screen colors. If the data histogram has not previously beenĬalculated and stored (in a. Will cause the screen image to be in a 3-color format approximating Color Infrared film.ġ.4 This step may not occur for all situations. The default settings call for the Red screen color to beĭerived from band 3, Green from band 2 and Blue from band 1. Note that by default, the area designated for display is the whole scene and the 3-ChannelĬolor Display Type is selected. Next a dialog box will appear to allow one to choose among This is a segment (709 lines x 1501 columns of pixels) of a 3-channel image of DPACĬollected on May 22, 2002. A dialog box will open to allow one to selectġ.3 Select ag020522_DPAC_cd.lan in the Exercise1 folder and Open, or simply double-click Requirements: MultiSpec application and image titled “ag020522_DPAC_cd.lan”, which you can download here.ġ.1 Start MultiSpec using the icon on the desktop or from MultiSpec in the Startup Menu.ġ.2 From the File menu choose Open Image. In this exercise, you will display an aircraft image of a portion of the Davis Purdue Agriculture Center in Randolf County, Indiana and view the data in several ways using MultiSpec.
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