Two-dimensional wavelet analysis in image processing

Continuous action mixing apparatus for bulk materials comprises a hollow horizontal cylindrical housing having an inlet port and outlet port for bulk material at the opposite ends thereof. The housing has mounted therein a horizontal driven shaft with tapering discs for mixing and conveying the bulk material, mounted on the shaft in spaced relationship and having their inner or concave surfaces facing the outlet port. Each disc has a blade formed on the outer or convex surface thereof and an opening provided therethrough in front of this blade in the direction of rotation of the disc. The blades and openings of adjacent discs are shifted relative to one another.