Source: Hacker News
Source: Hacker News
Source: Hack a Day
We’ve all gotten used to seeing movies depict people using night vision gear where everything appears as a shade of green. In reality the infrared image is monochrome, but since the human eye is very sensitive to green, the false-color is used to help the wearer distinguish the faintest glow possible. Now researchers from the University of California, Irvine have adapted night vision with artificial intelligence to produce correctly colored images in the dark. However, there is a catch, as the method might not be as general-purpose as you’d like.
Under normal illumination, white light has many colors mixed together. When light strikes something, it absorbs some colors and reflects others. So a pure red object reflects red and absorbs other colors. While some systems work by amplifying small amounts of light, those don’t work in total darkness. For that you need night vision gear that illuminates the scene with infrared light. Scientists reasoned that different objects might also absorb different kinds of infrared light. Training a system on what colors correspond to what absorption characteristics allows the computer to reconstruct the color of an image.
The only thing we found odd is that the training was on printed pictures of faces using a four-color ink process. So it seems like pointing the same camera in a dark room would give unpredictable results. That is, unless you had a huge database of absorption profiles. There’s a good chance, too, that there is overlap. For example, yellow paint from one company might look similar to blue paint from another company in IR, while the first company’s blue looks like something else. It is hard to imagine how you could compensate for things like that.
Still, it is an interesting idea and maybe it will lead to some other interesting night vision improvements. There could be a few niche applications, too, where you can train the system for the expected environment and the paper mentions a few of these.
Of course, if you have starlight, you can just use a very sensitive camera, but you still probably won’t get color. You can also build your own night vision gear without too much trouble.
Source: OSNews
Up until now, all installs of Raspberry Pi OS have had a default user called “pi”. This isn’t that much of a weakness – just knowing a valid user name doesn’t really help much if someone wants to hack into your system; they would also need to know your password, and you’d need to have enabled some form of remote access in the first place. But nonetheless, it could potentially make a brute-force attack slightly easier, and in response to this, some countries are now introducing legislation to forbid any Internet-connected device from having default login credentials.
So with this latest release, the default “pi” user is being removed, and instead you will create a user the first time you boot a newly-flashed Raspberry Pi OS image. This is in line with the way most operating systems work nowadays, and, while it may cause a few issues where software (and documentation) assumes the existence of the “pi” user, it feels like a sensible change to make at this point.
This is a pretty substantial change that might break some applications that assume the default “pi” user exists.
Source: Hacker News
Source: Hacker News
Source: Saturday Morning Breakfast Cereal
Hovertext:
I would like this VR game, plz
Source: Hacker News
Source: The Verge - All Posts
Starting next week, users of Barnes & Noble’s Android app will no longer be able to buy digital books in the app, and it seems to be due to a Google Play policy deadline that’s been more than a year and a half in the works. And it’s not just Barnes & Noble that’s affected; you aren’t able to buy Amazon’s Audible titles with a debit or credit card in the latest version of its Android app, either.
The changes appear to stem from Google’s insistence that apps use Google Play’s billing systems. Developers have long criticized Apple and Google for requiring the use of their own billing systems, in large part because of the so-called “app store tax” on many transactions.
Google updated its policies in September 2020 to clarify which types of...
Source: Boing Boing
Mihai Parparita's Infinite Mac presents classic Apple operating systems (Mac OS 8, System 7) in the browser: "They boot instantly, are filled with useful programs, allow data import, export and persistence, and try to bring the best of the web to retrocomputing." — Read the rest
