Search found 15 matches

by petri
Wed Jan 04, 2017 12:09 pm
Forum: Kickstarter Topics
Topic: OpenMV Cam M7 progress
Replies: 5
Views: 1441

Re: OpenMV Cam M7 progress

I look forward to putting in preorder for two M7 cams. But before I do, I would like to see some information on things like: - what is being/will be done to prevent parts / manufacturing issues such as ones that plagued the kickstarter campaign? - if some such issues nevertheless arise, what is the ...
by petri
Wed Jan 04, 2017 12:05 pm
Forum: Kickstarter Topics
Topic: Future wishlist
Replies: 6
Views: 1569

Future wishlist

The new M7 looks promising. Hopefully there will be M8, too :) Here's my personal wishlist: - alternative hw version without soldered-on pin headers - alternative hw version with the sensor-lens unit connect to main board by a cable (or a version that combines both of the above) - improved support f...
by petri
Thu Nov 24, 2016 2:04 am
Forum: General Topics
Topic: if else statement
Replies: 8
Views: 1195

Re: if else statement

@hvtronix , if you have Python-specific questions, the net is full of Python tutorials and Google is your best friend. Of course, http://www.python.org is a good place to start. Or search StackOverflow. Although In many cases, the quickest way to learn and figure out how things work in Python is sim...
by petri
Fri Aug 26, 2016 9:36 am
Forum: General Topics
Topic: Presence detection
Replies: 13
Views: 3337

Re: Presence detection

Here's an example algorithm for finding the most prominent color of the image. (source: http://pieroxy.net/blog/pages/color-finder/index.html ): I have not yet checked what kind of support the OpenMV has for this kind of algorithm. But here it is. Get all the pixels in the image and store their colo...
by petri
Fri Aug 26, 2016 9:26 am
Forum: Technical Discussion
Topic: Hw reset and/or reboot?
Replies: 12
Views: 2477

Hw reset and/or reboot?

I could not find any explanation of how to do hardware reset of the camera, effectively making it reboot.

Is it as simple as grounding the RST pin?

If so, what is the BOOT pin for, then, what's the difference?

Thanks.
by petri
Fri Aug 26, 2016 7:32 am
Forum: General Topics
Topic: Presence detection
Replies: 13
Views: 3337

Re: Presence detection

I took a look at the docs and it seems like one could use the image.find_template(template, threshold) function. So assuming we have an image , a template , and suitably tuned threshold value parameter, maybe the following code could work for detecting whether the "testitem" is present: checked_item...
by petri
Fri Aug 26, 2016 1:32 am
Forum: General Topics
Topic: Presence detection
Replies: 13
Views: 3337

Re: Presence detection

Ok thanks for the reminder. I'll expand on what I am looking for: It would be even nicer if the system could detect any missing object in such a setup, or handle any orientations of objects, but is that too much to expect from the system? The idea is that the positions of the items are always more o...
by petri
Wed Aug 24, 2016 4:49 pm
Forum: General Topics
Topic: Presence detection
Replies: 13
Views: 3337

Re: Presence detection

Yes. But I thought it'd be better to continue the thread than start a new one with near-identical topic. Should I open a new thread instead then?
by petri
Tue Aug 23, 2016 2:44 am
Forum: General Topics
Topic: Presence detection
Replies: 13
Views: 3337

Re: Presence detection

How about just detecting on/off presence of object then? Ie. detect when it is not being present? No need to classify it. Let's say I have a table with multiple different objects on it and I want to find out if a particular one is present or not? This is based on location of object, ie. we can assum...
by petri
Tue Aug 23, 2016 1:39 am
Forum: Technical Discussion
Topic: Catching the IDE "stop" in uPython
Replies: 2
Views: 611

Catching the IDE "stop" in uPython

How does the IDE stop the running uPython program on the camera? Does it send some sort of signal for which a handler could be registered? Or does it reset the camera in a way that is outside of uPython control or what? It would be useful to be able to catch the stop. UPDATE: I noticed the serial te...
by petri
Tue Aug 23, 2016 1:33 am
Forum: Technical Discussion
Topic: Broken USB conector
Replies: 6
Views: 1000

Re: Broken USB conector

An idea for anyone with a weak USB connector: Perhaps it would be a good idea to reinforce the USB connector by putting in some thick glue, or even some Sugru (https://sugru.com). I've been a happy user of Sugru for various purposes; perhaps it will help keeping the USB from breaking. Sugru does not...
by petri
Mon Aug 22, 2016 4:49 am
Forum: Technical Discussion
Topic: Checking battery status using ADC
Replies: 1
Views: 564

Checking battery status using ADC

When powered by a battery, would it be possible to check the battery power level by reading the voltage through the ADC pin? I read elsewhere in the forums (see the "help on connecting" thread) that unfortunately the ADC pin supposedly only tolerates 3.3V. My battery is 3.7V so I guess some sort of ...
by petri
Sun Aug 21, 2016 1:16 pm
Forum: General Topics
Topic: SD Card Size Recommendation
Replies: 5
Views: 1599

Re: SD Card Size Recommendation

The camera should support FAT32. Try deleting the volume and re-creating another FAT32 volume but limit the size to 2GB. I reformatted the card first as ExtFAT (out of curiosity, did not work) and then as FAT32. A funny thing happened; the card now shows as a regular ~8GB capacity on the OSX Mac, a...
by petri
Sun Aug 21, 2016 12:29 pm
Forum: General Topics
Topic: SD Card Size Recommendation
Replies: 5
Views: 1599

Re: SD Card Size Recommendation

I'm using a 2GBs uSD, and tested 8GBs (higher capacity should work) On OSX, I have tried two different 8GB uSD cards that are formatted as FAT32 and neither work with the camera. Both result in two green blinks and one bright white blink upon booting (via USB). After that, the cards show up normall...
by petri
Tue Jul 05, 2016 12:08 pm
Forum: Technical Discussion
Topic: Run IDE from source install (OSX)
Replies: 1
Views: 567

Run IDE from source install (OSX)

How does one do that? I checked the "getting started" docs & tried searching this forum but could not find any details. I took a look at the openmv-ide git repository and it looks like a forked QT Creator is used, why is this? When trying to clone the openmv-ide master, I got "fatal: reference is no...

Go to advanced search