DeltaCV

An open-source high performance library for image processing. including CPU optimization and GPU optimization. PRs are welcome.

For more details on DeltaCV ,please go to https://dasuda.top/category/#/DeltaCV.

     

•  Author: Haibo Wang
  
•  Email: dasuda2015@163.com
•  Home Page: dasuda.top

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1. Shared Memory

Dependencies

• Boost

Location

cpu/include/deltaCV/cpu/shm.hpp

Include

#include "deltaCV/cpu/shm.hpp"

For more details， see my blog;

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2. SIMD

Dependencies

• OpenCV(This library dose not depend on OpenCV, but the input of the function is often type-cv::Mat)
• SSE
• AVX

Compile options

You need put these compile options in your CMakeLists.txt.

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mavx2")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=haswell")

Samples

All samples are in cpu/examples/.

• inRange
• ycrcbWithSeg
• weightedGrayWithSeg
• grayBRWithSeg
• grayBRWithSegStandard

Performance Table

Image Size: 1024 x 1280（H x W）

Function	OpenCV/ms	DeltaCV/ms	Speed-up
inRange	1.06 - 1.18	0.29 - 0.30	3.5 - 4.0
ycrcbWithSeg	6.68 - 6.75	0.88 - 0.90	7.4 - 7.6
weightedGrayWithSeg	1.56 - 1.69	0.39 - 0.46	3.39 - 4.33
grayBRWithSeg	3.28 - 3.35	0.69 - 0.71	4.6 - 4.8
grayBRWithSegStandard	1.19 - 1.22	0.23 - 0.25	4.76 - 5.30

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3. CUDA

Dependencies

• CUDA
• OpenCV

Samples

All samples are in gpu/examples/.

• binarization
• colorSpace
• edgeDetection
• erode_dilate
• getHist
• equalizeHist
• blur

Performance Table

Image Size: 480 x 640（H x W）

Function	GPU/ms (NVIDIA GTX 1070 8G)	CPU/ms (OpenCV on i5 7500)	Speed-up
RGB2GRAY	0.008 - 0.010	0.340 - 0.360	3.4 - 45
RGB2HSV	0.150 - 0.200	3.900 - 4.400	19.5 - 29.3
thresholdBinarization	0.005 - 0.008	0.035 - 0.045	4.4 - 9.0
ostu	0.16-0.17	1.280-1.432	8.0-8.9
sobel / scharr	0.032 - 0.038	-	-
erode / dilate (3*3 rect)	0.045 - 0.049	-	-
getHist (bin:256)	0.145 - 0.149	-	-
equalizeHist(bin:256)	0.16-0.17	0.31-0.32	1.8-2.0
blur(3*3 guassian kernel)	0.036-0.040	-	-

Function List

Color space transformation

• RGB2GRAY(uchar3* dataIn,unsigned char* dataOut,int imgRows,int imgCols): in gpu/src/colorSpace.cu. Converting RGB images to gray-scale images.

• RGB2HSV(uchar3* dataIn,uchar3* dataOut,int imgRows,int imgCols,uchar3 minVal,uchar3 maxVal): in gpu/src/colorSpace.cu. Converting RGB images to HSV images， and using threshold segmentation to RGB images based on minVal and maxVal.

Binarization

• thresholdBinarization(unsigned char* dataIn,unsigned char* dataOut,short int imgRows,short int imgCols,unsigned char thresholdMin,unsigned char thresholdMax,unsigned char valMin,unsigned char valMax): in gpu/src/binarization.cu. Similar to OpenCV function threshold(), I designed 5 modes: THRESH_BINARY, THRESH_BINARY_INV, THRESH_TRUNC, THRESH_TOZERO, THRESH_TOZERO_INV.

/*
 * Compare 'threshold()' funciton in OpenCV
 * When:
 *      thresholdMin = thresholdMax and valMin = 0  ==> THRESH_BINARY
 *      thresholdMin = thresholdMax and valMax = 0  ==> THRESH_BINARY_INV
 *      thresholdMax = valMax and thresholdMin = 0  ==> THRESH_TRUNC
 *      thresholdMax = 255 and valMin = 0  ==> THRESH_TOZERO
 *      thresholdMin = 0 and valMax = 0  ==> THRESH_TOZERO_INV
 */

• ostu_gpu(unsigned char* dataIn,unsigned char* dataOut,unsigned int* hist,float* sum_Pi,float* sum_i_Pi,float* u_0,float* varance,int* thres,short int imgRows,short int imgCols): in gpu/src/binarization.cu. Binarization using ostu.

Edge Detection

• sobel(unsigned char* dataIn,unsigned char* dataOut,short int imgRows,short int imgCols): in gpu/src/edgeDetection.cu. Edge detection using sobel operator.

• scharr(unsigned char* dataIn,unsigned char* dataOut,short int imgRows,short int imgCols): in gpu/src/edgeDetection.cu. Edge detection using scharr operator.

Erode and Dilate

• erode(unsigned char* dataIn,unsigned char* dataOut,short int imgRows,short int imgCols,short int erodeElementRows,short int erodeElementCols): in gpu/src/erode_dilate.cu.

• dilate(unsigned char* dataIn,unsigned char* dataOut,short int imgRows,short int imgCols,short int dilateElementRows,short int dilateElementCols): in gpu/src/erode_dilate.cu.

Histogram

• getHist(unsigned char* dataIn, unsigned int* hist)： in gpu/src/getHist.cu.
• [wrapper]equalizeHist_gpu(unsigned char* dataIn,unsigned int* hist,unsigned int* sum_ni,unsigned char* dataOut,short int imgRows,short int imgCols,dim3 tPerBlock,dim3 bPerGrid)： in gpu/src/getHist.cu.(Unfinished)

Guassian Blur

• guassianBlur3_gpu(unsigned char* dataIn,unsigned char* dataOut,short int imgRows,short int imgCols,dim3 tPerBlock,dim3 bPerGrid): in gpu/src/blur.cu. Guassian blur with 3*3 kernel