numshears

R2026b

Number of shearlets

Syntax

NS = numshears(sls)

Description

NS = numshears(sls) returns the number of shearlets in the shearlet system sls. The number of shearlets does not include the lowpass filter, which is not sheared. The total filter size of the shearlet system is M-by-N-by-NS+1. M and N are the first and second elements, respectively, of the ImageSize value of sls.

The data type of NS matches the Precision value of the shearlet system.

Examples

Number of Shearlets in Shearlet System

Create a complex-valued shearlet system that can be applied to 256-by-256 images. The system has four scales.

sls = shearletSystem('ImageSize',[256 256],'TransformType','complex',...
    'NumScales',4);

Obtain the number of shearlets in the shearlet system.

num = numshears(sls)

num = 
80

Input Arguments

sls — Shearlet system

shearletSystem object

Shearlet system, specified as a shearletSystem object.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

GPU Code Generation
Generate CUDA® code for NVIDIA® GPUs using GPU Coder™.

Thread-Based Environment

Run code in the background using MATLAB® backgroundPool or accelerate code with Parallel Computing Toolbox™ ThreadPool.

The numshears function fully supports thread-based environments. For more information, see Run MATLAB Functions in Thread-Based Environment.

Version History

Introduced in R2019b

R2026b: Use thread-based environments

You can use numshears in thread-based environments. For more information, see Run MATLAB Functions in Thread-Based Environment.