Live data from Hacker News

Show HN: The text disappears when you screenshot it

unscreenshottable.vercel.app

111–120 of 204 posts

Re: Show HN: The text disappears when you screenshot it

#111

You can take TWO screenshots, moments apart, open in GIMP, paste one over the other and choose any one of these laying modes: Lighten, Screen, Addition, Darken, Multiply, Linear burn, Hard Mix, Difference, Exclusion, Subtract, Grain Extract, Grain Merge, or Luminance. https://ibb.co/DDQBJDKR

But then that would be a video, not a screenshot

Re: Show HN: The text disappears when you screenshot it

#112
post #34

Earlier quoted context omitted.

Clearly, I meant using a camera, and I'm guessing you knew that too

Not the parent but that was not at all clear to me. I immediately thought of taking multiple successive instantaneous screenshots and then stacking them. I'm not sure I would have thought of using a camera within a few minutes to an hour, it's not a tool I would ever reach for normally.

Oh, so your screenshot utility has "long exposure" and an "ND" filter and "shutter speed" controls, just like a phone's camera? What kind of screenshot utility simulates optical camera effects? What purpose does that serve? Care to share a link to it?

>Obviously harder to expose a bright screen without some ND since the shutter speed is the phone's main exposure control

https://en.wikipedia.org/wiki/Neutral-density_filter

https://en.wikipedia.org/wiki/Shutter_speed

Re: Show HN: The text disappears when you screenshot it

#113

Others have mentioned Branta Games, but I first saw the effect here: https://youtu.be/TdTMeNXCnTs

This one is actually more sophisticated because it doesn't rely on scrolling pixels like the OP. So the object doesn't just disappear in screenshots, but also when the animation stops moving! So you can't actually display text that stands still, like the "hello" in the OP.

Re: Show HN: The text disappears when you screenshot it

#114
post #8

Firefox on Android seems to just be a static image, I can't see any text.

Probably the result of canvas fingerprinting protection configured in your `about:config`? With a default profile it seems to work fine on Firefox for Android.

I haven't changed any of that on here.

Looks like I consistently get just the static image when I open in a new tab then switch to it, but then if I refresh the page without switching tabs it'll show the animation.

Re: Show HN: The text disappears when you screenshot it

#117
post #87

If anybody implements that to antiscrenshot some sensitive data, somebody else will use another phone, a tablet or a camera to record a video of it. Nice idea though.

Or the same one.

While a screencap image hides the message, a screencap video shows it perfectly well.

Re: Show HN: The text disappears when you screenshot it

#118

You can take TWO screenshots, moments apart, open in GIMP, paste one over the other and choose any one of these laying modes: Lighten, Screen, Addition, Darken, Multiply, Linear burn, Hard Mix, Difference, Exclusion, Subtract, Grain Extract, Grain Merge, or Luminance. https://ibb.co/DDQBJDKR

But then that would be a video, not a screenshot

Layered images do not a video make. Sequential images distributed over time do.

Re: Show HN: The text disappears when you screenshot it

#120

Ultimately people will just take photos of the screen. Seems like you’re just annoying people. I feel like there’s an ethical issue. If something is on my screen I own it. I know the law doesn’t agree but it feels right to me.

The point is that it's noise and you can't "capture" a still image of the text / information (relies on motion to be viewable).
Post reply on HN