Hi,

I’m having difficulties in running PyBoof concurrently in multiple processes (it’s a Flask application running in GUNICORN). Would it be possible for you to help me? Keep getting the following exception when several worker processes are created (all is well in single process with GEVENT):

Launching Java process Gateway Server Started Exception in thread "main" py4j.Py4JNetworkException at py4j.GatewayServer.startSocket(GatewayServer.java:788) at py4j.GatewayServer.start(GatewayServer.java:763) at py4j.GatewayServer.start(GatewayServer.java:746) at pyboof.PyBoofEntryPoint.main(PyBoofEntryPoint.java:59) Caused by: java.net.BindException: Address already in use (Bind failed) at java.base/java.net.PlainSocketImpl.socketBind(Native Method) at java.base/java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:436) at java.base/java.net.ServerSocket.bind(ServerSocket.java:395) at py4j.GatewayServer.startSocket(GatewayServer.java:786) ... 3 more

I guess it’s trying to open the same port on all processes.

Is this a disabling issue? Should I assign different ports on every process? How would I do it as PyBoof doesn’t seem to have a way to choose a Port?

Thanks in advance for any help you may provide.

Luís Ferreira

Hi, I am using pyboof qr detection and it has been working great.

However, it has come to my attention that if the qr code content contains binary data of a zipfile, converting to base64 from qr.message results in a corrupted/invalid zipfile. However, using other qr reader library in node.js it is able to detect and convert to base64 and open up the zipfile correctly.

Unfortunately I am not able to include the qr content as it contains private information.

for qr in detector.detections:
    message = base64.b64encode(qr.message.encode()).decode()
return message

Hi

I am encountering a case that, not all QRs in the image is detected by PyBoof.

I have also attached sample QR image for testing and wondering if there is anything we can configure with existing PyBoof version? Or it is something BoofCV model need to be improved? Thanks

Linn Htoo

Hi, I installed and tested PyBoof two times, one using pip and then other using the source (SNAPSHOT) to test qr-code and micro-qr-codes detection, but none of them worked. After the installation I ran microqr_detect.py and qrcode_detect.py that returned zero detections using all the images provided in data @ 526f3a9.

I'm using python 3.8.10 and open-jdk 17.0.3.

On running ./setup.py build, I get the following error:

 ./setup.py build 
running build
running build_py

FAILURE: Build failed with an exception.

* What went wrong:
Could not determine java version from '11.0.3'.

Could you please suggest how to install PyBoof and resolve this issue?

I'm getting this error when I'm trying to run the example. I'm also getting this

File "/home/muletezemkedir/.local/share/virtualenvs/pyboof-6ZbX4iA_/lib/python3.7/site-packages/pyboof/init.py", line 48, in check_jvm print(" build dates = {:s} {:s}".format(build_date,java_build_date)) TypeError: unsupported format string passed to NoneType.format

LinkageError occurred while loading main class pyboof.PyBoofEntryPoint java.lang.UnsupportedClassVersionError: pyboof/PyBoofEntryPoint has been compiled by a more recent version of the Java Runtime (class file version 58.0), this version of the Java Runtime only recognizes class file versions up to 55.0

Environment: 1,HW:Raspberry Pi 4 2,OS:Linux 3,Python: 3.7 4,Java:JDK11 5,py4j:0.10.8.1 6:PyBoof:0.36.1

Summery: I have installed pyboof successfully by pip3 on the command line . But when I tried to import pyboof ,a Py4networkError error occured.

import pyboof Launching Java process エラー: メイン・クラスpyboof.PyBoofEntryPointのロード中にLinkageErrorが発生しました java.lang.UnsupportedClassVersionError: pyboof/PyBoofEntryPoint has been compiled by a more recent version of the Java Runtime (class file version 58.0), this version of the Java Runtime only recognizes class file versions up to 55.0 Failed to successfully launch the JVM after 5 seconds. Aborting Traceback (most recent call last): File "/home/pi/.local/lib/python3.7/site-packages/py4j/java_gateway.py", line 958, in _get_connection connection = self.deque.pop() IndexError: pop from an empty deque

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "/home/pi/.local/lib/python3.7/site-packages/py4j/java_gateway.py", line 1096, in start self.socket.connect((self.address, self.port)) ConnectionRefusedError: [Errno 111] Connection refused During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "", line 1, in File "/home/pi/.local/lib/python3.7/site-packages/pyboof/init.py", line 227, in from pyboof.calib import * File "/home/pi/.local/lib/python3.7/site-packages/pyboof/calib.py", line 2, in from pyboof.ip import * File "/home/pi/.local/lib/python3.7/site-packages/pyboof/ip.py", line 25, in class ThresholdType: File "/home/pi/.local/lib/python3.7/site-packages/pyboof/ip.py", line 27, in ThresholdType FIXED = gateway.jvm.boofcv.factory.filter.binary.ThresholdType.FIXED File "/home/pi/.local/lib/python3.7/site-packages/py4j/java_gateway.py", line 1678, in getattr "\n" + proto.END_COMMAND_PART) File "/home/pi/.local/lib/python3.7/site-packages/py4j/java_gateway.py", line 1012, in send_command connection = self._get_connection() File "/home/pi/.local/lib/python3.7/site-packages/py4j/java_gateway.py", line 960, in _get_connection connection = self._create_connection() File "/home/pi/.local/lib/python3.7/site-packages/py4j/java_gateway.py", line 966, in _create_connection connection.start() File "/home/pi/.local/lib/python3.7/site-packages/py4j/java_gateway.py", line 1108, in start raise Py4JNetworkError(msg, e) py4j.protocol.Py4JNetworkError: An error occurred while trying to connect to the Java server (127.0.0.1:25333)

Tried things: It seems like launching the java Gateway failed. So I tried to alert the pyboof/init.py gateway = JavaGateway.launch_gateway() #gateway = JavaGateway()

Then the java gateway is ok,but a new error occured.

import pyboof Traceback (most recent call last): File "", line 1, in File "/home/pi/.local/lib/python3.7/site-packages/pyboof/init.py", line 101, in if not check_jvm(False): File "/home/pi/.local/lib/python3.7/site-packages/pyboof/init.py", line 49, in check_jvm gateway.jvm.pyboof.PyBoofEntryPoint.nothing() TypeError: 'JavaPackage' object is not callable

I have used pyboof successfully on Mac, but the same way didn't work well on Raspberry Pi .Could you help with it.

Line: https://github.com/lessthanoptimal/PyBoof/blob/be6fec7/pyboof/init.py#L80

Reason: I am trying to use this library in a GUI application that I am creating.

Solution: Probably wrap it around a try-catch?

Bumps numpy from 1.18.4 to 1.21.0.

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

image = pb.re(img_path, np.uint8) config_fh = pb.ConfigFastHessian() config_fh.extractRadius = 4 config_fh.maxFeaturesPerScale = 300 # Create the detector and use default for everything else feature_detector = pb.FactoryDetectDescribe(np.uint8).createSurf(config_detect=config_fh) # Detect features in the first image locs, desc = feature_detector.detect(image)

Traceback (most recent call last): File "/Users/frank/Documents/workspace/python/vector_search/object_detection_bow/test.py", line 23, in surf_feature('/Users/frank/Downloads/nike1.jpg') File "/Users/frank/Documents/workspace/python/vector_search/object_detection_bow/test.py", line 13, in surf_feature locs, desc = feature_detector.detect(image) File "/usr/local/lib/python3.7/site-packages/pyboof/feature.py", line 257, in detect locations = pyboof.b2p_list_point2D(java_locations,np.double) File "/usr/local/lib/python3.7/site-packages/pyboof/geo.py", line 326, in b2p_list_point2D raise Exception("Yeah this needs to be implemented. Turn mmap on if possible") Exception: Yeah this needs to be implemented. Turn mmap on if possible

So，what's wrong?

Really, I'm about to use a python deep learning framework (fast.ai wrapper over PyTorch), and I'll have to do QRCode detection, crop and rotate on images before piping those images to pytorch. I already use qrcode detection from BoofCV in java (top of class implementation), so this fits like a glove! Thanks!

Simple import pyboof prints to stdout

Gateway Server Started
Launching Java process: java_port=25333 python_port=2533

And some other things to stderr. Please don't print to stdout. I am making some CLI script and want to use stdout for my output.

Thanks in advance

I upgraded to latest version 0.41 and Im getting this error:

py4j.protocol.Py4JNetworkError: An error occurred while trying to start the callback server (127.0.0.1:25334)

environment: Debian GNU/Linux 11 (bullseye)

Steps to replicate on version 0.40.1:

import pyboof as pb
import numpy as np
pyboof_detector = pb.FactoryFiducial(np.uint8).qrcode()  # Works

pb.init_pyboof()
pyboof_detector = pb.FactoryFiducial(np.uint8).qrcode()  # Throws an error

The error thrown is:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.9/site-packages/pyboof/recognition.py", line 533, in __init__
    self.boof_image_type = dtype_to_Class_SingleBand(dtype)
  File "/usr/local/lib/python3.9/site-packages/pyboof/image.py", line 512, in dtype_to_Class_SingleBand
    return gateway.jvm.java.lang.Class.forName(class_path)
  File "/usr/local/lib/python3.9/site-packages/py4j/java_gateway.py", line 1709, in __getattr__
    answer = self._gateway_client.send_command(
  File "/usr/local/lib/python3.9/site-packages/py4j/java_gateway.py", line 1036, in send_command
    connection = self._get_connection()
  File "/usr/local/lib/python3.9/site-packages/py4j/java_gateway.py", line 980, in _get_connection
    raise Py4JNetworkError("Gateway is not connected.")
py4j.protocol.Py4JNetworkError: Gateway is not connected

In the same interpreter, if I run pb.check_jvm(False) afterwards, it returns True

Versions:

• Python 3.8.13
• pyBoof 0.40.1
• py4j 0.10.9.7
• cat /etc/os-release -> Debian GNU/Linux 11 (bullseye)

Any help would be greatly appreciated. Thanks in advance!

Hello,

I'm trying to run the QR code detection example on a Ubuntu 20.04.3 LTS 64-bit in a VirtualBox in Win10, but it seems PyBoof is not working properly. Running the DetectQrCodeApp from demonstrations.sh works just fine. The Python scripts are ran in a venv.

Running the qrcode_detect.py example as is or with any of the example images with QR codes says that no QR codes were detected without giving any error:

(AIKIT-env) mihail@myVB:~/AIKIT/PyBoof/examples$ python qrcode_detect.py Launching Java process Gateway Server Started Detected a total of 0 QR Codes

Few examples do work, like: gradient.py object_tracking.py (actually tested only under Win10) threshold_image.py

Others don't, like: detect_lines.py (window with images shows, but no line can be seen, again no errors received)

video_mosaic.py, error recieved:

Launching Java process: java_port=25333 python_port=25334 Gateway Server Started Traceback (most recent call last): File "video_mosaic.py", line 15, in config_tracker.klt.toleranceFB = 10.0 File "/home/mihail/AIKIT/AIKIT-env/lib/python3.8/site-packages/pyboof/common.py", line 95, in getattr return object.getattribute(self, item) AttributeError: 'ConfigPointTracker' object has no attribute 'klt'

estimate_camera_motion.py, error received:

Launching Java process: java_port=25333 python_port=25334 Gateway Server Started Detected 3150 features in image 0 3179 image 1 Traceback (most recent call last): File "estimate_camera_motion.py", line 40, in matches = associator.associate() File "/home/mihail/AIKIT/AIKIT-env/lib/python3.8/site-packages/pyboof/feature.py", line 205, in associate output.append((association.src, association.dst, association.fitScore)) File "/home/mihail/AIKIT/AIKIT-env/lib/python3.8/site-packages/pyboof/common.py", line 44, in getattr return object.getattribute(self, item) AttributeError: 'JavaWrapper' object has no attribute 'src'

match_features.py, error received:

Launching Java process: java_port=25333 python_port=25334 Gateway Server Started Traceback (most recent call last): File "match_features.py", line 22, in locs0, desc0 = feature_detector.detect(image0) File "/home/mihail/AIKIT/AIKIT-env/lib/python3.8/site-packages/pyboof/feature.py", line 298, in detect descriptions = b2p_list_descF64(java_descriptions) File "/home/mihail/AIKIT/AIKIT-env/lib/python3.8/site-packages/pyboof/feature.py", line 42, in b2p_list_descF64 mmap_list_TupleF64_to_python(boof_list, pylist) File "/home/mihail/AIKIT/AIKIT-env/lib/python3.8/site-packages/pyboof/feature.py", line 641, in mmap_list_TupleF64_to_python gateway.jvm.pyboof.PyBoofEntryPoint.mmap.write_List_TupleF64(java_list, num_read) File "/home/mihail/AIKIT/AIKIT-env/lib/python3.8/site-packages/py4j/java_gateway.py", line 1321, in call return_value = get_return_value( File "/home/mihail/AIKIT/AIKIT-env/lib/python3.8/site-packages/py4j/protocol.py", line 326, in get_return_value raise Py4JJavaError( py4j.protocol.Py4JJavaError: An error occurred while calling o55.write_List_TupleF64. : java.lang.IndexOutOfBoundsException: Index 5892 out of bounds for length 5892 at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64) at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70) at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:266) at java.base/java.util.Objects.checkIndex(Objects.java:359) at java.base/java.util.ArrayList.get(ArrayList.java:427) at pyboof.BoofMemoryMapped.write_List_TupleF64(BoofMemoryMapped.java:75) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:568) at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244) at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357) at py4j.Gateway.invoke(Gateway.java:282) at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132) at py4j.commands.CallCommand.execute(CallCommand.java:79) at py4j.GatewayConnection.run(GatewayConnection.java:238) at java.base/java.lang.Thread.run(Thread.java:833)

I tried different PyBoof versions as well: 0.39.1.post1, 0.38.0, 0.36.0. Python 3.8.10 JDK installed from zulu17.30.15-ca-jdk17.0.1-linux_amd64.deb

I get similar success running PyBoof directly on Win10 with Python 3.9.9 and Oracle jdk-17_windows-x64. Same examples work and the ones that don't work give same error. Running the DetectQrCodeApp from demonstrations.bat works with the exception that the movie.mp4 example hangs up after just about 1 second, but I could live with this one.

I have no idea where to search for a possible problem/mistake, so any hint would be useful. The only thing I've still didn't tried is, to use Python 3.5, because the requirement is Python >=3, isn't it?

Thanks! Mihail

P.S. Building from source fails on both Ubuntu and Win10. Small part from the output from Ubuntu:

(AIKIT-env) mihail@myVB:~/AIKIT/PyBoof$ ./setup.py build /home/mihail/AIKIT/AIKIT-env/lib/python3.8/site-packages/setuptools/dist.py:473: UserWarning: Normalizing '0.39.1r1' to '0.39.1.post1' warnings.warn( running build running build_py Starting a Gradle Daemon (subsequent builds will be faster)

FAILURE: Build failed with an exception.

• Where: Build file '/home/mihail/AIKIT/PyBoof/build.gradle'

• What went wrong: Could not compile build file '/home/mihail/AIKIT/PyBoof/build.gradle'. startup failed: General error during semantic analysis: Unsupported class file major version 61

  java.lang.IllegalArgumentException: Unsupported class file major version 61 at groovyjarjarasm.asm.ClassReader.(ClassReader.java:196) at groovyjarjarasm.asm.ClassReader.(ClassReader.java:177) at groovyjarjarasm.asm.ClassReader.(ClassReader.java:163) at groovyjarjarasm.asm.ClassReader.(ClassReader.java:284) at org.codehaus.groovy.ast.decompiled.AsmDecompiler.parseClass(AsmDecompiler.java:81) at org.codehaus.groovy.control.ClassNodeResolver.findDecompiled(ClassNodeResolver.java:251) ......

EDIT: I just found out, that the tools I actually need are the fiducial functions. So I tried to run the examples: fiducial_square_aruco.py fiducial_square_binary_3D.py fiducial_square_image_3D.py

and all three are only working without intrinsics, which is of no use to me, as I need the 3D position. Otherwise I get the following error:

Launching Java process: java_port=25333 python_port=25334 Gateway Server Started Configuring detector Traceback (most recent call last): File "fiducial_square_binary_3D.py", line 19, in detector.set_intrinsic(intrinsic) File "/home/mihail/AIKIT/AIKIT-env/lib/python3.8/site-packages/pyboof/recognition.py", line 218, in set_intrinsic distortion = create_narrow_lens_distorter(intrinsic) NameError: name 'create_narrow_lens_distorter' is not defined

So now I have concrete a question: when I download the Python library by entering pip3 install pyboof, do I get a binary or is it compiling it from source in the background, possibly without letting me know that there were errors like when I try to compile it manually?

Hello, I was wondering if the java version's stereo multi-view scene reconstruction examples with uncalibrated cameras exists in python. If it doesn't exist, is it possible to make it in the current version of PyBoof?