高斯滤波使用特定的滤波核对图片进行卷积,是一种线性平滑滤波,广泛应用于图像处理的噪声消除过程。
| 输入图像 | 参数 | 输出图像 |
|---|---|---|
![]() | kernelSize = 3 | ![]() |
3X3高斯滤波核如下:
kernel=161121242121
5X5高斯滤波核如下:
kernel=25611464141624164624362464162416414641
int32_t hbVPGaussianBlur(hbUCPTaskHandle_t *taskHandle,,
hbVPImage *dstImg,
hbVPImage const *srcImg,
hbVPGaussianBlurParam const *gaussianParam);
详细接口信息请查看 hbVPGaussianBlur。
// Include the header
#include "hobot/hb_ucp.h"
#include "hobot/vp/hb_vp.h"
#include "hobot/vp/hb_vp_gaussian_blur.h"
// init Image, allocate memory for image data
hbUCPSysMem src_mem;
hbUCPMallocCached(&src_mem, src_stride * src_height, 0);
hbVPImage src_img{HB_VP_IMAGE_FORMAT_Y,
HB_VP_IMAGE_TYPE_U8C1,
src_width,
src_height,
src_stride,
src_mem.virAddr,
src_mem.phyAddr,
nullptr,
0,
0};
hbUCPSysMem dst_mem;
hbUCPMallocCached(&dst_mem, dst_stride * dst_height, 0);
hbVPImage dst_img{HB_VP_IMAGE_FORMAT_Y,
HB_VP_IMAGE_TYPE_U8C1,
dst_width,
dst_height,
dst_stride,
dst_mem.virAddr,
dst_mem.phyAddr,
nullptr,
0,
0};
// init param
hbVPGaussianBlurParam vp_param;
vp_param.kernelSize = 3;
vp_param.borderType = HB_VP_BORDER_REPLICATE;
// init task handle and schedule param
hbUCPTaskHandle_t task_handle{nullptr};
hbUCPSchedParam sched_param;
HB_UCP_INITIALIZE_SCHED_PARAM(&sched_param);
sched_param.backend = HB_UCP_DSP_CORE_0;
// create task
hbVPGaussianBlur(&task_handle, &dst_img, &src_img, &vp_param);
// submit task
hbUCPSubmitTask(task_handle, &sched_param);
// wait for task done
hbUCPWaitTaskDone(task_handle, 0);
// release task handle
hbUCPReleaseTask(task_handle);
// release memory
hbUCPFree(&src_mem);
hbUCPFree(&dst_mem);

