A GeoTiff Image Map (or “orthomosaic”) is created by “stitching” together all ortho-rectified images created by the OneButton \ OneButton Professional applications.
In some projects, certain artifacts may appear in the final orthomosaic (such as clouds, moving objects).
This document will show the user how to remove these artifacts using the GeoClipboard application.
The user will need to have the following data:
- An ortho-mosaic GeoTiff file
- All of the ortho-images created in the project
- Icaros GeoClipboard application
How to Remove Artifacts in an Ortho-Mosaic
- Open the GeoClipboard application
- In the “File” tab, press the “new” button to create a new project.
- In the “Create new project” window, choose "OrthoPhoto" as the project type (Figure 1).
Figure 1 - Create new project window
- In the “Processing” section, check the “Do the color balancing” check box.
- In the “Paths” section, go to the “Project file” text box click the “…” button.
- Navigate to the desired folder and to enter a name for this project (Figure 1).
- Go to the "Color transformation folder (trn files)" text box and press the “…” button.
- Navigate to your project folder and find the StitchMe\ Workdir\ color_transformation folder and select it.
- Press the "OK" button to create the project.
- Next, add the ortho-mosaic to the project - in the “File” tab, press the “Add Sheets” button. When prompted, navigate to the ortho-mosaic GeoTiff file\s and select it\them.
- Now add the ortho-images to the project – in the “File” tab, press the “Add Images” button .
- In the "Add Images To Project" window, navigate to your project folder and select the “OUT_ORTHO” folder (Figure 2).
Figure 2 - Add Images to Project window
10. In the “sampling” toolbox, press the “Create New Patch” tool and draw a polygon around the feature that needs to be patched (Figure 2). Double click the left mouse button to finish drawing the patch polygon.
Figure 3 - Example of a patch polygon
11. You can also add or remove areas from the polygon you have created – see Appendix for further details.
12. Along the bottom and left side of the GeoClipboard window are sub-panels which list the different ortho-images available for this patch. You can select each row in the image list (arrow #1 in Figure 4) or from the image preview sub-panel (arrow #2 in Figure 4) to find the image that is most suitable.
Figure 4 - Arrow #1 points to the list of images that can be used in the selected patch. Arrow #2 points to the image preview window which shows a preview of what each image will look like once it is in the patch
13. After deciding on the appropriate image, you can create another patch in another area of the mosaic or continue to the next step.
14. In the "Edit" tab and press the “Run” button .
15. After the process finishes, you can review each area by selecting each line in the “Patches” list (see Figure 5). This will zoom to the selected patch and show the updated mosaic:
Figure 5 - Updated orthomosaic after implementing the patch
Appendix – Reshaping a Patch Polygon
- To reshape the patch polygon, select the patch you want to modify in the “Patches” list.
- In the “Sampling” toolbox, press the “Reshape Patch” tool button . This tool allows the user to add or subtract from the patch polygon.
- To add an area to the patch polygon, start from the inside of the polygon and draw a new line around the area that you want to add to the original polygon. Make sure to finish the line inside the polygon (Figure 6).
Figure 6 - Reshape a polygon – line starts inside and ends inside the polygon
4. Double click the left mouse button to complete the line and add the new area to the polygon (Figure 7).
Figure 7 - Patch polygon after it has been reshaped
5. To remove an area from the patch polygon, press the “Reshape Patch” tool
6. Start the line on the outside of the polygon and draw it inside the polygon, ending the line on the outside of the polygon (Figure 8).
Figure 8 - Reshape a polygon – line starts inside and ends inside the polygon
7. Double click the left mouse button to complete the line and remove the area from the polygon patch (Figure 9):