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Local Registration Tool:
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The Local Registration tool provides a simple method for temporarily adjusting poorly registered imagery in the viewing window. This method simply shifts the selected image from one position to another. To use this tool, identify a known location on both the poorly registered image and on a spatial data set with the desired accuracy. Once this point is identified, select the image to correct in the TOC then press the Local Registration tool (Figure 1, Item 10). After the tool is active, click the identified location or from location on the poorly registered image, turn the selected image's visibility OFF, then click on the same location on the accurate data sets or to location. Once the to location click event occurs, the selected image will shift to that location. To see the results make the selected image visible again. Repeat the from and to location clicks until the desired correction is made. Depending on how poorly registered and the geometry of the subject image this operation may need to be applied several times during the course of classifying the image. It is suggested that the image's registration be evaluated each time the user moves to a new viewing window.
Figure 13: common or from point indicated by arrow
Figure 14: Common or to point indicated by arrow
Figure 15: Applied correction shift results