Hi all, Got a Desire HD and a radio control helicopter (Trex 500).
Would like to be able to look at the heli in flight with the camera (in video mode is ok) and see what speed the rotors are spinning at.
All that's required is a method of adjusting the camera shutter speed while pointing at the heli until the blades look stationary. (Maybe use the volume rocker for adjustment)
Also a little routine to put the revolution figures on screen.
The heli blades should spin at about 2700rpm but for a wider variety of helis, would like to read a range from about 1900 to 3200 rpm.
A shutter harmonic frequency could be used as I dont think the shutter can operate at these speeds.
There are units available that use this method... But the mobile phone with camera already has the hardware needed. Just need a little bit of programming, I'm guessing.
If anyone can help i'm sure there would be a lot of interest from various fields....
Feedback on the idea welcome.....
aero star
PS. Thinking of existing measuring apps available, any reason why shutter speed can't be added to give object speed calculation and result etc etc
PPS. Recording the heli in flight and then applying the Tachometer software would be ok.... might be easier to adjust the shutter speed for the video recording or playback... ???
Related
So, out of boredom i came across this useful App
deciBel
Apk: http://www.appbrain.com/app/decibel/bz.bsb.decibel
great tool to check and measure noise level in the area
however our SGS phone is so sensitive that even at a quiet room it measures 60+ db which is rather extremely high
in a noisy environment it jumps between 76 db to 140+ db
can some body else confirm?
also if you happen to have another Android phone with a less super active mic, can you compare what is the range difference between that phone and of the SGS
thanks
I wanted to calibrate it properly so i can use it to measure server room noise, and desktop fan noise, and other type of noise wherever i happen to be in to replace the noisy parts with quiet parts
Got that app too. Still got to calibrate it...
The best thing to do is to get an profesional Db-meter and try to calibrate it.
I'm in the Sound and Light engineering and the my boss has got a expensive machine for that like €1200 ($1627) because it must be extremely accurate.
So if you go to a concert and see a tent in the middle before the stage, ask if they have a dB meter
Hi,
I am pleased about X8 hardware but the camera.
My previous phone is Nokia 6120 Classic with 2.0 mpx camera, it hasn't auto focus as X8 neither but sky and earth.
In the group of non auto-focus cameras the nokia's solution is #1, 5 star performance. Unfortunately SE-s camera hardware could have only 2 stars. The reason of my opinion: slow response time from ccd, that is why your pics become cloudy and (motion)blurry.
Nokia 6120's cam: *****
SE Xperia X8's cam: **
So... anybody has any kind of software solution to make X8's camera a little bit more usable?
A little tip from me:
Camera Pro: you can use your camera without capturing noice. And it has some possibilities to set brightness, contrast and color after shooting.
But it doesn't solve the built in motion blur effect. :[
I need more tipps.
Moved to General
Ah. I had problems with the camera being super-blurry too. But this is easily remedied, just set the camera from 'Auto' to 'Sports'. This will fix this 'motion blur' issue you are having, but doesn't stop the overall quality being crap.
You should know by now that mobile phones don't make very good cameras anyway.
Thank you.
I haven't tought that a simple option will improve the camera.
I have left one question: wich app will shoot silent photoes in sport mode?
Thx.
Putting your phone into silent mode should do it. If not, download an app called "Volume" by 'CoreCode' and turn the system volume all the way down. Not the most ideal solution, but it works. I'm sure there'd be a better option if you rooted (such as replacing the shutter sound file), but I haven't messed around with any of that yet.
Ok. Thanks.
How about a thread on possible SW enhancements through future FW updates? IDK if it matters, but we could try.
Here's my list, but please add whatever SW issues/bugs you've run into.
1. They should put 'microphone noise suppression' back to call settings. My HK Z3+ doesn't have it, but my Taiwanese Z2 does. I'm using those in the US, but I can ask for it on behalf of HK folks anyway
2. Occasional high 'mobile radio active' numbers on 4G (LTE) mostly from Google apps . My fix was to 'close all apps' once in a while. It's a known lollipop issue (Thanks @addicted1900)
3. Current 8mp auto mode is great for low-light shots. I'd say it's probably the best one in Androidland. Day shots could use a 16mp auto mode, but that will probably ruin current 8mp mode's low noise advantage with excessive noise. So it'd be great if they could adjust the resolution on the fly with some extra settings (like dynamic resolution, always 16mp/20mp, always 8mp,etc). Or at least include a separate high res auto mode (it'd be confusing - I know)
4. Auto mode could use a little lower EV while shooting at bright objects.
5. I used 'trepn' to profile core usage (& assuming trepn itself is not a CPU hog)
Home screen: All 4 little (a53) cores running at max 1.56 GHz most of the times with occasional bursts from 1/2 big (a57) cores. Sounds like an overkill
Settings page: Ditto
Camera (superior auto for photo only): Ditto
Fun fact: Only little cores run the 4K show. Something could be done there too
Point is there is room for improvement & going by Sony's fw update history (their fw updates are quite solid, btw), we could ask for the same thing here
Adaptive light puts screen backlight too low in dark environments.
I wish it could get dimmer at night in fully dark rooms
When Stamina mode is on ( with extended usage enabled), The decreasing of framerate is noticeably. (Never happened to my Z1)
ing005 said:
When Stamina mode is on ( with extended usage enabled), The decreasing of framerate is noticeably. (Never happened to my Z1)
Click to expand...
Click to collapse
Well, you know that's the way "extended usage" is meant to work?
Yeah but as I said , it doesn't happen to my Z1 , which is 3 generations older.
Profile mode for high, medium and low performance.
Given the performance of sd810, I don mind a under clocked sd 810 for better performance. Just like how one plus is doing
When recording video I'd like the option to defeat noise cancellation/DSP and record 'flat'. Or tweak it somehow. Right now my Z2 records generally better audio on video than my Z3+ .... the Z3+ doesn't seem to record with much gain either, when it's supposed to be autogain - can't believe it needs that much headroom.
Plug in the STM10 (or a Smartlav+ ) and thankfully audio is very much improved - but I don't always have those with me.
I'm sure the speakers can go louder for ringtones, again seems quieter than my Z2 by maybe 3dB or 6dB perhaps (haven't measured, but human ear generally sensitive to 3dB differences).
Really pleased on the Z3+ things like Lifelog and Social are uninstallable, even PlayStation and PSN apps come off without root (could not be removed from Z2). I really like the direction of optional bloatware.
I don't know how broad Sony's Backup vault is, but I'd like to be able to backup/restore custom ringtones and SMS/hangout notifications for my contacts. This is one area where iPhone excels - restore to a new iPhone and pretty much everything remains identical. I don't want to have to futz with NFC locally when it could all already be stored in the cloud.
Overall, I am very satisfied with the Z3+ ... but I warn Sony, if they start going all proprietary again (eg all that ATRAC nonsense, can't even play a video from a standard USB stick on my Dad's Bravia TV, etc) -- then I will leave as quickly as I arrived
Another one for my wish list - a quick way to add Reminders by voice input - perhaps add the option to the long-press power button menu. (I know I think there is an option to always have Google Now listening if the screen is on, but I don't want that)
Not sure of the security implications though, I notice on my Z2 and Z3+ for example if I want to change Camera Mode out of Superior Auto after quick-launching it from sleep with the hardware button then I need to unlock with my password.
I have the opportunity to really put the video and audio recording abilities of this phone to the test tonight at a couple of music venues. I've got to admit that the audio settings of the manual video camera and the HD audio recorder confuse me a bit. I understand that this phone has a raised level at which it'll clip (130db) but I don't even really know how to go about making sure I'm not clipping audio. (Video, sure, but not audio.) Any advice, instruction and/or input is appreciated with audio stuff. I want to give this thing a fair shake.
Second question... I know where two of the three mics are, one top and one bottom, but I've not yet seen anyone point out where the third one is, ideas?
CHH2 said:
I have the opportunity to really put the video and audio recording abilities of this phone to the test tonight at a couple of music venues. I've got to admit that the audio settings of the manual video camera and the HD audio recorder confuse me a bit. I understand that this phone has a raised level at which it'll clip (130db) but I don't even really know how to go about making sure I'm not clipping audio. (Video, sure, but not audio.) Any advice, instruction and/or input is appreciated with audio stuff. I want to give this thing a fair shake.
Second question... I know where two of the three mics are, one top and one bottom, but I've not yet seen anyone point out where the third one is, ideas?
Click to expand...
Click to collapse
If I'm not mistaken the 3rd Microphone is internal, I recall seeing this on one of many youtube reviews I watched..
A weird place to keep a mic.
Ok, didn't get any input so I went in flying blind last night. For audio settings, I went into the HD audio recorder and looked at its concert settings and used those. I think I still need to figure out the settings better but I can actually hear more separation to the parts of the band than I could when I was there. (It was loud and just about a wall of noise!) So I have two links attached below. One was recorded just with the main lens. The other one I switched between the two. As you will see, there's a couple of things to point out, all which were obvious and to be expected. 1) My hands are shaky, especially standing there holding a phone up at various points of the set and through entire songs. 2) The wide angle lens obviously doesn't do as well being f2.4 at 8mp vs f1.8 and 16mp for the main but it did allow me to take in the whole band despite standing up front. 3) I'm not sure if the stabilization was active or not. I think it might have been and there's just only so much one should expect from it. Any way, the settings I used for the visual portion were FHD, bit rate high (24), ISO 3200 at 1/60 with video set to 30fps. (Oh! And I need to add a note, the refocusing is my fault for touching the screen during recording.)
https://youtu.be/ZobXudjVghM
https://youtu.be/zb_ncY5lbB0
Is there any way to increase shutter speed more than default available.
Bought the phone hoping that it has manual controls so it would have shutter speed options but really disappointed to see that the shutter speed is limited to just 1/15s.
Might be a hardware limitation. Certain apps like Footej can go to 1/10s when I'm rooted, but that seems to be the maximum. Manual mode is indeed a bit of a disappointment.