In this article, we construct two-dimensional continuous/smooth local
sinusoidal bases (also called Malvar wavelets) defined on L-shaped reg
ions. With this construction, one is able to construct local sinusoida
l bases and lapped orthogonal transforms (LOT) on arbitrarily shaped r
egions. This work is motivated from and useful in object-based video c
oding, where a segmented moving object may have arbitrary shape and bl
ock transform coding of this object is needed.