Augmented reality: is it possible to detect a QR code inside a 3D object rendered in AR?

My thought here is when a user reaches a GPS location in the game, an AR view will detect the environment and display a rendered 3D game object.

But what I also want is for that virtual 3D game object to include a random QR / pin code, which the app could also detect and read. Activating another navigation.

Something like the beginning.

usb – Linux does not detect USB stick

I have a bootable Windows pendrive that I would like to format, the problem is that Linux does not detect it, when I connect the pendrive and ready the devices with lsblk the device appears to me as

sdb 8:16 1 28.8G 0 disk

or with lsusb

Bus 001 Device 038: ID 0951: 1666 Kingston Technology DataTraveler 100 G3 / G4 / SE9 G2

respectively, but after a few minutes it stops detecting the pendrive.
If I disconnect the pendrive and reconnect it, the same error continues and when trying to enter the console sudo fdisk -l it lists all the devices and it stays "hung" for a few minutes and never lists the flash drive until it stops detecting it and obviously never lists it. I also cannot access it through sudo fdisk /dev/sdb it tells me that the directory or device does not exist.

In windows if the pendrive detects me but I cannot format it.

Detect when "aria-checked" of "recaptcha" is true in Python

I'm trying to make the xpath detect when the value aria-checked it is true to continue with the code but it always gives me this error:

    Traceback (most recent call last):
  File "C:/Users/meganano202/Desktop/MEGA/bot/", line 136, in 
    check_mark = driver.find_element_by_xpath("//*(@id='rc-anchor-container')/div(3)/div(1)/div/div/aria-checked='true'")
  File "C:Python 37", line 394, in find_element_by_xpath
    return self.find_element(by=By.XPATH, value=xpath)
  File "C:Python 37", line 976, in find_element
    return self.execute(Command.FIND_ELEMENT, {
  File "C:Python 37", line 321, in execute
  File "C:Python 37", line 242, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.InvalidSelectorException: Message: invalid selector: Unable to locate an element with the xpath expression //*(@id='rc-anchor-container')/div(3)/div(1)/div/div/aria-checked='true' because of the following error:
TypeError: Failed to execute 'evaluate' on 'Document': The result is not a node set, and therefore cannot be converted to the desired type.
  (Session info: chrome=80.0.3987.149)

Basically I want that when I complete the reCaptcha and the green popcorn comes out I will continue the code

linux – How do I detect a call to Xorg to take screenshots?

X can take screenshots of the entire desktop. I would like to detect these calls as they are made, but through something like ebpf or sysdig, instead of patching the calls at the server level. How can I do this? Is there a program that can also do this?

time series analysis: an algorithm to detect whether noisy univariate data is constant or is the sum of step functions

In an explicit algorithm I'm writing, there is a certain stage where I need to determine whether certain noisy univariate data is constant or not or is the sum of step functions.

For example, define foo as the algorithm I'm looking for (write in python):
assert foo ((0) * 20) == False
assert foo ((0) * 20 + (1) * 20) == True
affirm foo ((0) * 20 + (5) * 30 + (1) * 70) == True

  • The data in the examples is not noisy, but suppose the true one is (just a little bit, one can determine where a step might take place by looking at the plot of the data.

I will be happy to hear any ideas, thanks.

sniffer: is there a way to detect packets from a remote IP address?

One way to capture remote traffic over the Internet, when it is not on the same LAN as the receiver or sender, is by hijacking BGP. Kapela and Pilosov made a great presentation on this topic at Defcon 16:

The attack requires the attacker to have control over an AS. You can send bogus prefix ads with favorable properties to your peers so they choose to route victim traffic through it. These ads will spread and the attacker can capture a large part of the traffic (or even all of it) destined for its victim. In order for the traffic to be delivered to the victim, the attacker must keep one of his "clean" partners so that he can deliver the traffic there.

The attack is complex and depends on many factors. The Internet is not a predictable place in terms of traffic flow. However, Kapela and Pilosov give a successful live demo of capturing traffic from Defcon's place. Another famous example is Pakistan accidentally hijacking YouTube traffic in 2008 ( China has been accused of hijacking large portions of the Internet traffic from the United States (

One way to protect yourself against this is by using end-to-end encryption, such as using SSL or IPSec. There are also some initiatives that try to make BGP more secure (SBGP, SOBGP).

Using nmap to detect the operating system in real time

I would like to understand if nmap can be used to detect OS type in real time (Vxworks, threadx, free RTOS etc.).

Has anyone done similar work before or if you have any idea how to do it please help share

Computer vision: what is the best algorithm to detect the texture of a person's clothes in real time for a mobile robot?

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detect new block, what does it mean?

Help me
what does it mean to detect new block I am a new user

customs and immigration: what chemicals do you use to detect explosives?

I am a doctor in Civil Engineering, with specialization in Environmental Engineering and Water Resources. On December 6, 2019, I traveled from San Juan, Puerto Rico to Tampa, Florida. They performed an explosives detection test on a deodorant that was in my hand pack and did not inform me. The next day, when I apply it, I burn the armpit and then generate pimples as it matures. I already have three months with that condition. I need to know the safety data sheet to know what control should I take or what side effects will it have. I went to an allergist and he tells me that without knowing what the chemical was, there was nothing I could do. I wanted to know if you had taken an allergy to amoxicillin, but it turned out that I am not allergic to amoxicillin. I am a federal employee of DHS, Federal Emergency Management of Hazard Mitigation Cadre. I have the deodorant as evidence. I need your help.