VO WBC Dump Demo#

Overview#

This sample demonstrates how to use the WBC (White Balance Calibration) dump flow in the K230 VO (Video Output) module. WBC is used to calibrate display white balance and improve display quality.

Functional Description#

WBC Functions#

This sample demonstrates the following key WBC functions:

white-balance calibration
WBC data dump to file
WBC parameter configuration
calibration-quality evaluation

WBC Characteristics#

automatic calibration support
manual white-balance parameter adjustment
temperature-related compensation
calibration-data export

Application Scenarios#

display quality optimization
white-balance calibration
display-effect testing
production-line calibration

Source Location#

Demo source path: src/rtsmart/examples/mpp/sample_vo_wbc_dump

Usage#

Build Method#

In the K230 RTOS SDK root directory, run make menuconfig, enable the VO WBC dump sample, then rebuild the firmware.

Run Example#

./sample_vo_wbc_dump [options]

Parameter Description#

Parameter	Description	Default
`output_file`	output filename	`wbc_data.bin`
`calibrate`	whether to run calibration	`yes`
`dump_data`	whether to dump data	`yes`

Expected Result#

After running, the sample will:

initialize the VO module
configure WBC
run white-balance calibration
dump WBC data to file
print calibration statistics

Example output:

VO WBC Dump Demo
==================

Initializing VO module...
VO initialized successfully

Configuring WBC...
WBC module configured

Starting WBC calibration...
Calibrating white balance...
Channel R: Gain=1.2, Offset=10
Channel G: Gain=1.1, Offset=5
Channel B: Gain=1.15, Offset=8

Calibration completed!

Dumping WBC data...
Data size: 1024 bytes
Output file: wbc_data.bin

Calibration statistics:
R gain: 1.200
G gain: 1.100
B gain: 1.150
R offset: 10
G offset: 5
B offset: 8
Quality score: 95.5

Dump completed!
Press Ctrl+C to exit.

Tip

WBC calibration can significantly improve display quality. For VO APIs, refer to Display Output API.