VLIB background subtraction problem

osunm

Hi, all

I have been working as a background subtraction in VLIB v2.2.
I am using VLIB_updateEWRMean16 () and VLIB_updateEWRVarianceS16 ().

I tried to change the update rate. However, there is no change in the background.

I would like to update the background a little faster.

What can I do the update should be the background?

My work is as follows.

- Variable Settings
#define MINBLOBAREA 16
#define MAXIMUM_BLOB 16

Int16 thresholdFactor = THRESHOLD_FACTOR_S16 / 2;
Int16 thresholdGlobal = CAMERA_NOISE_S16 / 32;

#pragma DATA_ALIGN (fgMask, 256);
#pragma DATA_ALIGN (foreground, 256);
#pragma DATA_ALIGN (CCMap, 256);
#pragma DATA_ALIGN (currentMeans, 256);
#pragma DATA_ALIGN (currentVars, 256);

Uint32 fgMask [IMAGESIZE / 32];
Uint8 foreground [IMAGESIZE];
Uint8 CCMap [IMAGESIZE * 3];
Int16 currentMeans [IMAGESIZE * 3];
Int16 currentVars [IMAGESIZE * 3];
Int16 * pCurrentMean = & currentMeans [0];
Int16 * pCurrentVars = & currentVars [0];
Uint32 * pFgMask = & fgMask [0];
Uint8 * pForeground = & foreground [0];
Int16 bgAdaptRate = IIR_ALPHA_S16;

- The first initialization tasks:
// Initialize the running mean "image"
VLIB_initMeanWithLumaS16 (pCurrentMean, pImgLuma, frame_size);
// Initialize the running variance "image"
VLIB_initVarWithConstS16 (pCurrentVars, thresholdGlobal, frame_size);

- The second consecutive iterations:
// Call the subtraction background function
VLIB_subtractBackgroundS16 (pFgMask, pCurImgLuma, pCurrentMean, pCurrentVars, thresholdGlobal, thresholdFactor, frame_size);
// Update Background Mean
VLIB_updateEWRMeanS16 (pCurrentMean, pCurImgLuma, pFgMask, bgAdaptRate, frame_size);
// Update Background Variance
VLIB_updateEWRVarianceS16 (pCurrentVars, pCurrentMean, pCurImgLuma, pFgMask, bgAdaptRate, frame_size);
VLIB_unpackMask32 (pFgMask, pForeground, frame_size);
VLIB_createConnectedComponentsList (gHandle, (short) width, (short) height, (int *) pFgMask, MINBLOBAREA, 1);
IMG_thr_gt2max_8 (pForeground, pImgDst, width, height, 0);

Why does not the background update?
How to tell if my fault is different.

Raise the images resulted in here.