detectMulti() x86-64 and detectMulti() ARM64 work differently in QRCodeDetector in some cases (problem with resize)

[AleksandrPanov]

QRCodeDetector.detectMulti() x86-64 and QRCodeDetector.detectMulti() ARM64 work differently in some cases

• OpenCV => 4.6.0 Python
• Operating System / Platform => x86/64 ubuntu 20.04 and jetson nano ARM64

Detailed description

script:

import cv2 as cv
def main():
    print(cv.__version__)
    image = cv.imread("image056.jpg", cv.IMREAD_IGNORE_ORIENTATION)
    detector = cv.QRCodeDetector()
    res = detector.detectAndDecodeMulti(image)
    print(res)

result x86/x64:

4.6.0
(False, (), None, ())

ARM64 detect and decode successfully:

corners: 7.21591736e+02, 2.26398071e+02, 1446., 592., 9.76341980e+02, 1.28422656e+03, 178., 807.
decoded_info: "http://www.bestekmall.com/"

image056.jpg:

image from https://boofcv.org/notwiki/regression/fiducial/qrcodes_v3.zip

also some differently values in "detection/nominal/image001.jpg", "detection/nominal/image047.jpg", ...

Issue submission checklist

• I report the issue, it's not a question
• I checked the problem with documentation, FAQ, open issues,
• I updated to the latest OpenCV version and the issue is still there
• There is reproducer code and related data files: videos, images, onnx, etc

[AleksandrPanov]

There is problem with resize()+INTER_LINEAR image. Resizing with a non-integer scale factor works differently on x86/arm.
cpp sample:
test.cpp..txt

arm (raspberry pi 4, cortex A72, Raspberry Pi OS 64 bit) result:

x86_64 (ryzen 2700x, Ubuntu 20.04) result:

Check images diff with python script:

import cv2 as cv
import numpy as np
img = cv.imread("res_arm.png")
img1 = cv.imread("res_x86_64.png")
print(img[0,0:5])
print()
print(img1[0,0:5])
print()
print(np.max(img-img1))

Result:

[[255 255 255]
 [245 245 245]
 [153 153 153]
 [ 64  64  64]
 [  0   0   0]]

[[255 255 255]
 [246 246 246]
 [155 155 155]
 [ 64  64  64]
 [  0   0   0]]

255

QR problem in this line:
resize(bin_barcode, intermediate, new_size, 0, 0, INTER_LINEAR);