Beautiful app, jpap. Well-done! I can't wait to do some side-by-side comparisons between this and video stills, and see what kind of image quality differences there are. My overall impression of the app itself is that it's incredibly solid. Keep building apps!
Scientific Breakthrough Lets SnappyCam App Take 20 Full-Res Photos Per Second
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Re: Scientific Breakthrough Lets SnappyCam App Take 20 Full-Res Photos Per Second
#112This looks similar to what Microsoft Research's BLINK [42] does on Windows Phone. Alas I wasn't able to find any publications on what they are doing (which is strange for MSR). As I don't have my phone currently I can't even look whether they are doing full resolution too or whether they are dropping down to smaller sizes.
[42] http://research.microsoft.com/en-us/um/redmond/projects/blin...
Re: Scientific Breakthrough Lets SnappyCam App Take 20 Full-Res Photos Per Second
#113DCT is already lossy [1], so the statements around 8 megapixels are completely pointless, and worst of all, its 1990 lossy technology. Wavelet transformations completely destroy any DCT. That said, if their emphasis is on producing pictures with minimal time delta at highest resolution, algorithms used for still pictures are out of place. Video compression algorithms still use DCT and wavelets, but they do so only af…
You are right on the loss: it's purposefully introduced as a quantization step after performing the DCT, and before losslessly compressing the resulting coefficients with Huffman and encoding to the final JPEG bitstream. Despite all of that, JPEG has now become computationally tractable. I remember the days where it took tens of seconds to encode a JPEG on a commodity machine. Now, with the help of SIMD, we can encod…
Man, I hope I'll know as much as you do one day... Congrats on the app! I just bought it and I'm really liking it! One suggestion; would outputting to a gif file be too difficult? I could really see people using this to create gifs of their lives that they could share to Tumblr or Facebook.
Re: Scientific Breakthrough Lets SnappyCam App Take 20 Full-Res Photos Per Second
#114At 20fps, could you make a 3d camera app by the user moving their camera in space and then correcting for stabilization with the accelerometers etc telling you point in space and using the multiple view points as individual cameras.
That's a really interesting machine vision problem and a lot more complex than a JPEG codec. :-) I wonder how long before we start to see Kinect-like infrared cameras mounted on phones to make the depth problem easier to solve. That would be cool!
I want to see if you could use all the rapid frames, plus a variant of that cool Adobe image de-blurring tech [1] that was shown a while ago to produce a clearer, sharper image during motion?
[1]: http://prodesigntools.com/photoshop-cs7-image-deblurring.htm...
Re: Scientific Breakthrough Lets SnappyCam App Take 20 Full-Res Photos Per Second
#115It looks great but I have a few questions/comments. 1. What is the difference in quality between using this and the video capture mode? I.e. if what I really want is a high quality video, would this get me a better result than the built in programs? 2. Seeing as how you've done all this work (and how Android apps can be compiled from C) how difficult is it to port this to Android so that the rest of us can get in on…
1. It really depends on what you're after: are you looking for a video sequence that plays back, or an individual still? Video is better for the former, SnappyCam for the latter. 2. It's a lot of work, hinted at in another thread here on HN. The entire "app" build on top of the JPEG codec needs to be built from scratch; new artwork is required, etc. 3. I just tried it from another machine and works for me. My backend…
I have the same issue (3), on Safari and Chrome: mouse clicks in the menus after they're opened are ignored, but the keyboard works to select a video.
Re: Scientific Breakthrough Lets SnappyCam App Take 20 Full-Res Photos Per Second
#116> To put the speed in perspective, SnappyCam is about 4X faster than the normal iPhone 5 Camera app, and more than twice as quick as the Samsung Galaxy S4′s 7.5 shots per second. Does it mean that S4's hardware is faster than iPhone 5 given they're using similar algorithms, and if you'd make the same app for Android it could get even better results?
It's unclear to me, as there's a lot more going on when taking a photo than you might think. :) (I originally thought I could knock together a basic SnappyCam app on top of the JPEG codec within a week or two, it took months.)
If SnappyCam can do it on hardware that is older than the S4, then I can't see why technically Samsung can't lift their game.
And judging by how quickly they've been chasing Apple, and sometimes stepping ahead, I wouldn't be surprised to see a bit of leap-frogging for some time to come.
Let's see what the 5S/C brings in a few months! I'm excited.
Re: Scientific Breakthrough Lets SnappyCam App Take 20 Full-Res Photos Per Second
#117Earlier quoted context omitted.
Given that niche social/mobile networks for short videos are so hot right now (ie. Vine, Instagram Video), it might be more fruitful for you to plan on creating a new one.
The Cinemagram guys started off down that path, an Instagram clone for animated GIF cinemagraphs, then quickly pivoted toward short videos to compete with Vine and Instagram on similar territory. I'm still not convinced. :-)
Speaking of which, any plans for this to make GIFs :D?
Re: Scientific Breakthrough Lets SnappyCam App Take 20 Full-Res Photos Per Second
#118Earlier quoted context omitted.
You are right on the loss: it's purposefully introduced as a quantization step after performing the DCT, and before losslessly compressing the resulting coefficients with Huffman and encoding to the final JPEG bitstream. Despite all of that, JPEG has now become computationally tractable. I remember the days where it took tens of seconds to encode a JPEG on a commodity machine. Now, with the help of SIMD, we can encod…
Man, I hope I'll know as much as you do one day... Congrats on the app! I just bought it and I'm really liking it! One suggestion; would outputting to a gif file be too difficult? I could really see people using this to create gifs of their lives that they could share to Tumblr or Facebook.
Thanks! :-) To be honest, none of my formal training prepared me for what went into SnappyCam---only the "how" to go about learning to do so. I'm sure you could pick up a few tricks in the same way by working on a cool pet project or two.
With so many recent requests for AGIF, I'm absolutely going to add it to the app. (It's been on my list for a while, but lower priority than getting up a solid core product and the social sharing that is in development at the moment.)
Re: Scientific Breakthrough Lets SnappyCam App Take 20 Full-Res Photos Per Second
#119More technical details on SnappyLabs blog:
http://www.snappylabs.com/blog/snappycam/2013/07/31/iphone-k...
Re: Scientific Breakthrough Lets SnappyCam App Take 20 Full-Res Photos Per Second
#120Earlier quoted context omitted.
I've just gotta say: This is one of the main reasons I keep coming back to HN. A story gets posted about some cool new tech, and the creator is in the comments answering questions. Simply awesome.
haha, cool. :-) To be honest, I don't often post here because I'm busy working, but am enjoying the discussion on a baby I've nursed for two years now. :-) Thanks for your post!
Just got this app. I've got to say— wow! So well put together, the whole everything— the app, the website, the web-based social platform. Giving $0.99 for something a person worked on for 2 years feels wrong and great at the same time, but I think enough of us will do so to have made it worth your while.