Proj5: [Auto]Stitching Photo Mosaics

Part1: Image Warping and Mosaicing

In this part of the project, we will create image mosaic by registering, projective warping, and compositing multiple photographs.

1.1 Recover Homographies

The transformation is a homography: p’=Hp, where H is a 3x3 matrix with 8 degrees of freedom (lower right corner is a scaling factor and can be set to 1) 

1.2 Image Rectification

Here are some examples of recified images.

1.3 Blend the images into a mosaic

Finally, stitch together two blended pictures.

/Users/tinahong/anaconda/lib/python3.5/site-packages/skimage/util/dtype.py:110: UserWarning: Possible precision loss when converting from float64 to uint8
  "%s to %s" % (dtypeobj_in, dtypeobj))

Part2: Feature Matching for Autostitching

The goal of this part of the project is to create a system for automatically stitching images into a mosaic

Step1: Detecting corner features in an image Using Harris Interest Point Detector

Here are the Harris corners overlaid on two images.

Then, we implement Adaptive Non-Maximal Suppression and here are the 100 chosen corners overlaid on each of the previous two images. 

Step2: Extract a Feature Descriptor for each feature point

/Users/tinahong/anaconda/lib/python3.5/site-packages/scipy/misc/pilutil.py:482: FutureWarning: Conversion of the second argument of issubdtype from `int` to `np.signedinteger` is deprecated. In future, it will be treated as `np.int64 == np.dtype(int).type`.
  if issubdtype(ts, int):
/Users/tinahong/anaconda/lib/python3.5/site-packages/scipy/misc/pilutil.py:485: FutureWarning: Conversion of the second argument of issubdtype from `float` to `np.floating` is deprecated. In future, it will be treated as `np.float64 == np.dtype(float).type`.
  elif issubdtype(type(size), float):

Step3: Match these feature descriptors between two images

Step4: Use RANSAC method to compute a homography

Step5: Generate a mosaic

Some more examples...

/Users/tinahong/anaconda/lib/python3.5/site-packages/scipy/misc/pilutil.py:482: FutureWarning: Conversion of the second argument of issubdtype from `int` to `np.signedinteger` is deprecated. In future, it will be treated as `np.int64 == np.dtype(int).type`.
  if issubdtype(ts, int):
/Users/tinahong/anaconda/lib/python3.5/site-packages/scipy/misc/pilutil.py:485: FutureWarning: Conversion of the second argument of issubdtype from `float` to `np.floating` is deprecated. In future, it will be treated as `np.float64 == np.dtype(float).type`.
  elif issubdtype(type(size), float):

/Users/tinahong/anaconda/lib/python3.5/site-packages/scipy/misc/pilutil.py:482: FutureWarning: Conversion of the second argument of issubdtype from `int` to `np.signedinteger` is deprecated. In future, it will be treated as `np.int64 == np.dtype(int).type`.
  if issubdtype(ts, int):
/Users/tinahong/anaconda/lib/python3.5/site-packages/scipy/misc/pilutil.py:485: FutureWarning: Conversion of the second argument of issubdtype from `float` to `np.floating` is deprecated. In future, it will be treated as `np.float64 == np.dtype(float).type`.
  elif issubdtype(type(size), float):

/Users/tinahong/anaconda/lib/python3.5/site-packages/scipy/misc/pilutil.py:482: FutureWarning: Conversion of the second argument of issubdtype from `int` to `np.signedinteger` is deprecated. In future, it will be treated as `np.int64 == np.dtype(int).type`.
  if issubdtype(ts, int):
/Users/tinahong/anaconda/lib/python3.5/site-packages/scipy/misc/pilutil.py:485: FutureWarning: Conversion of the second argument of issubdtype from `float` to `np.floating` is deprecated. In future, it will be treated as `np.float64 == np.dtype(float).type`.
  elif issubdtype(type(size), float):

/Users/tinahong/anaconda/lib/python3.5/site-packages/scipy/misc/pilutil.py:482: FutureWarning: Conversion of the second argument of issubdtype from `int` to `np.signedinteger` is deprecated. In future, it will be treated as `np.int64 == np.dtype(int).type`.
  if issubdtype(ts, int):
/Users/tinahong/anaconda/lib/python3.5/site-packages/scipy/misc/pilutil.py:485: FutureWarning: Conversion of the second argument of issubdtype from `float` to `np.floating` is deprecated. In future, it will be treated as `np.float64 == np.dtype(float).type`.
  elif issubdtype(type(size), float):