testXfMinMaxLoc.py

#!/usr/bin/python3.6

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print("Running testXfMinMaxLoc.py ...")
print("Loading overlay")
from pynq import Overlay
bs = Overlay("/usr/local/lib/python3.6/dist-packages/pynq_cv/overlays/xv2minMaxLoc.bit")
bs.download()

print("Loading xlnk")
from pynq import Xlnk
Xlnk.set_allocator_library('/usr/local/lib/python3.6/dist-packages/pynq_cv/overlays/xv2minMaxLoc.so')
mem_manager = Xlnk()

import pynq_cv.overlays.xv2minMaxLoc as xv2
import numpy as np
import cv2
import time

import OpenCVUtils as cvu

print("Loading image ../images/bigBunny_1080.png")
img = cv2.imread('../images/bigBunny_1080.png')
imgY = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)

print("Size of imgY is ",imgY.shape);
height, width, channels = img.shape

numberOfIterations=10
print("Number of loop iterations: "+str(numberOfIterations))


xFimgY  = mem_manager.cma_array((height,width),np.uint8) #allocated physically contiguous numpy array 
xFimgY[:] = imgY[:] # copy source data

minLocSW = np.ones((2),np.uint16)
maxLocSW = np.ones((2),np.uint16)
minLocHW = np.ones((2),np.uint16)
maxLocHW = np.ones((2),np.uint16)

print("Start SW loop")
startSW=time.time()
for i in range(numberOfIterations):
    minSW,maxSW,minLocSW,maxLocSW = cv2.minMaxLoc(imgY) #minMaxLoc on ARM
stopSW=time.time()


print("Start HW loop")
startPL=time.time()
for i in range(numberOfIterations):
    minHW,maxHW,minLocHW,maxLocHW = xv2.minMaxLoc(xFimgY) #minMaxLoc offloaded to PL, working on physically continuous numpy arrays
stopPL=time.time()
    
print("SW frames per second: ", ((numberOfIterations) / (stopSW - startSW)))
print("PL frames per second: ", ((numberOfIterations) / (stopPL - startPL)))

print("Checking SW and HW results match")
#numberOfDifferences,errorPerPixel = cvu.imageCompare(xFdst,dstSW,True,False,0.0)
#print("number of differences: "+str(numberOfDifferences)+", average L1 error: "+str(errorPerPixel))
print("SW min="+str(minSW))
print("SW max="+str(maxSW))
print("HW min="+str(float(minHW)))
print("HW max="+str(float(maxHW)))

print("SW minloc="+str(minLocSW))
print("SW maxloc="+str(maxLocSW))
print("HW minloc="+str(minLocHW))
print("HW maxloc="+str(maxLocHW))

print("Done")