  Multiscale transform has become a key ingredient in many data processing
tasks. With technological development, we observe a growing demand for methods
to cope with non-linear data structures such as manifold values. In this paper,
we propose a multiscale approach for analyzing manifold-valued data using
pyramid transform. The transform uses a unique class of downsampling operators
that enables non-interpolatory subdivision schemes as upsampling operators. We
describe this construction in detail and present its analytical properties,
including stability and coefficient decay. Next, we numerically demonstrate the
results and show the application of our method for denoising and abnormalities
detection.
