how to load list of images to PyStackReg for alignment

Question

I want to align a list of images (already as np arrays) using pystackreg to stack them. I tried this:

imagefiles=glob.glob(r"C:\Users\HP\My Python stuff\openCV\Polarization\*degrees.jpg")
imagefiles.sort()
images=[]
for filename in imagefiles:
  img=cv2.imread(filename)
  img=cv2.cvtColor(img,cv2.COLOR_BGR2RGB)
  img=np.int16(img)
  images.append(img)
sr=StackReg(StackReg.AFFINE)
alimages=sr.register_transform_stack(images, reference='first')

which thows this error message:

~\anaconda3\lib\site-packages\pystackreg\pystackreg.py in register_stack(self, img, reference, n_frames, axis, moving_average, verbose, progress_callback, suppress_axis_warning)
    320             )
    321 
--> 322         if len(img.shape) != 3:
    323             raise Exception("Stack must have three dimensions")
    324 

AttributeError: 'list' object has no attribute 'shape'

I think the entire stack of images needs to be a 3d array. how can i do that? and would it work in RGB images and grayscales alike?

the documentation only covers loading a stack from a multi frame tiff like this:

img0 = io.imread('some_multiframe_image.tif') # 3 dimensions : frames x width x height
sr = StackReg(StackReg.RIGID_BODY)
out_first = sr.register_transform_stack(img0, reference='first')

how to load list of images to PyStackReg for alignment

0 Answers0