Media Data Processing V2 (VPC Cropping, Pasting, and Resizing)

Sample Obtaining

Refer to vpc_sample to obtain the sample.

Description

This sample implements image cropping, resizing, padding, color space conversion (CSC), pyramid, lookup table (LUT) remapping, and histogram analysis.

Principles

The following table lists the key functions involved in this sample.

Initialization	aclInit: performs initialization. aclFinalize: performs deinitialization.
Device Management	aclrtSetDevice: sets the compute device. aclrtGetRunMode: obtains the run mode of the software stack. The internal processing varies depending on the run mode. aclrtResetDevice: resets the compute device and cleans up all resources associated with the device.
Memory Management	aclrtMallocHost/aclrtFreeHost: allocates or frees host memory, respectively. hi_mpi_dvpp_malloc/hi_mpi_dvpp_free: allocates or frees device memory respectively for storing input and output data during media data processing.
Data Transfer	aclrtMemcpy: Transfers decode source data from the host to the device. Transfers the inference result from the device to the host. Data transfer is not required if your app runs in the board environment.
Media Data Processing V2	See the APIs provided in Vision Preprocessing Core (VPC).

Directory Structure

The sample directory is organized as follows:

├── common                       //Directory of the sample code files
│   ├── sample_comm.cpp         //Implementation file of common functions
│   ├── sample_comm.h           //Header file that declares common functions
│   ├── sample_comm_vpc_*.cpp   //Implementation file of functions for implementing image cropping and resizing

├── smoke_vpc                    //Directory of the sample code files
│   ├── sample_vpc.cpp          //Implementation file of the main function
                                         
├── CMakeLists.txt               //Build script

App Build and Run

Refer to vpc_sample to obtain the sample. View the README file in the sample.

Parent topic: Samples