The source images for this dataset were:
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View 0 | View 1 | View 2 | View 3 |
The results of mosaicing them are as shown below:
(click on image to see full sized version)
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| View 0 Mosaic | View 1 Mosaic |
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| View 2 Mosaic | View 3 Mosaic |
Changing Number of Control Points
The following images are the same as above but now with 4 control points only:
The images are seriously distorted when we use only 4 control points as can be seen in the following images.
(click on image to see full sized version)
| View 0 Mosaic | View 1 Mosaic |
| View 2 Mosaic | View 3 Mosaic |
Comparison of Image Blending Techniques - No Blending/Averaging/Feathering(Weighted Averaging)
Blending the seams between images is very important to obtain good quality mosaics with smooth transitions at the edges. The following images illustrate this point by showing the same mosaics using :-
- No Image Blending
- Averaging
- Weighted Averaging (Feathering)
(click on image to see full sized version)
| View 0 without blending | View 0 with averaging | View 0 with Feathering (weighted averaging) |
| View 1 without blending | View 1 with averaging | View 1 with Feathering (weighted averaging) |
| View 2 without blending | View 2 with averaging | View 2 with Feathering (weighted averaging) |
| View 3 without blending | View 3 with averaging | View 3 with Feathering (weighted averaging) |
Illustrating Contrast Adjustment
Contrast adjustment is necessary if the camera exposure is different for the images to be mosaiced. as this will result in significant intensity differences to show up in the mosaic. I have described the contrast adjustment approach in the implementation section of the report. To illustrate contrast adjustment , i intentionally changed the illumination of one of the images and then ran the mosaicing program with contrast adjustment turned on. The source image whose contrast was changed is as shown below:
View 2 with increased brightness
The images in the following table compare mosaicing with contrast adjustment versus no adjustment.
(click on image to see full sized version)
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| View 0 Mosaic without contrast adjustment | View 0 Mosaic with contrast adjustment |
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| View 1 Mosaic without contrast adjustment | View 1 Mosaic with contrast adjustment |
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| View 2 Mosaic without contrast adjustment | View 2 Mosaic with contrast adjustment |
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| View 3 Mosaic without contrast adjustment | View 3 Mosaic with contrast adjustment |
To test the planar mosaicing , i took a single image and cut it into 2 parts using the paint program. Now i manually found correspondences using xv between the two parts and gave them as input to the mosaicing program. The images below show the two parts that were stitched together to create the planar mosaic from the split pieces.
Click to see enlarged version
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| First Image | Second Image |
Stitching these two images gives the following result:-
This is a 180 degree panaromic mosaic i constructed using images of my room. These are the individual images:-
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