User Manual - pancroma

The Transfer method processes the fastest of the three. However it is based ona global histogram matching algorithm and usually may not produce as good amatch as the Hayes or TERAS. The TERAS often produces the best match.Gap filling an image is a multi step process requiring first that two sets of exactlymatched images be prepared.IMPORTANT NOTE: Input files must be pre-processed before gap filling so thatthey are co-registered, have the same corner UTM coordinates, and have thesame row and column count. Pleas see Section 59 for an explanation of how toeasily accomplish this in one easy step.IMPORTANT NOTE: Detailed procedures for gap filling are described in theTutorials at the end of this Manual. White Papers and instructional videos ongap filling are also available at www.PANCROMA.com.IMPORTANT NOTE: The 'Compute Common Extents' utility determines theUTM coordinates of the overlap area for two images. Once it does this it copiesthe coordinates to the coordinate text boxes in the Subset Data Entry form. Inorder to subset single images to those coordinates, you need to follow thatoperation by (without exiting the program):1) Selecting 'Close Graphics Coordinates and Reset'. This closes both filesbut retains the coordinate information in the text boxes.2) Then select 'File' | 'Open' and re-open one of your two files.3) Select 'Band Combination' | 'Subset Images' | 'Subset One Band'. Whenthe Subset Data Entry form becomes visible you should see the cornercoordinates already entered. I attached a picture of what the form shouldlook like at this point.4) Select the 'Select by Coordinates' radio button.5) When you select 'Enter' the subset will be computed and displayed.6) Now select 'Close Graphics Window and Reset.Repeat steps (2) through (5) for the second image. The UTM coordinates willpersist in the text boxes for as many images as you wish to subset.128