Search found 130 matches
- Wed May 27, 2020 10:34 pm
- Forum: Technical Discussion
- Topic: RGB RAW values
- Replies: 11
- Views: 902
Re: RGB RAW values
When you say the red and blue value is always the same, do you mean for every pixel in the image (which would imply a bug that should be fixed), or for some particular pixel or set of pixels? Sounds like you're looking at the green pixels of the Bayer matrix. When you say you want the RAW value of a...
- Sun May 24, 2020 10:39 pm
- Forum: General Topics
- Topic: Power requirements confirmation
- Replies: 4
- Views: 537
Re: Power requirements confirmation
I fully understand the challenge of writing, much less maintaining, documentation. That's why I'm offering to contribute.
- Sun May 24, 2020 10:19 pm
- Forum: General Topics
- Topic: Power requirements confirmation
- Replies: 4
- Views: 537
Re: Power requirements confirmation
I write thorough questions to avoid responses of the "go read the docs" variety. If the docs are confusing, or even potentially inconsistent, I ask clarifying questions. I suppose that since I'm still ramping up on building the firmware (I think may have succeeded actually, I need to run some tests)...
- Sun May 24, 2020 4:16 am
- Forum: General Topics
- Topic: Power requirements confirmation
- Replies: 4
- Views: 537
Power requirements confirmation
It looks like the H7 is speced to draw a little less power than the M7: (idle-no-card/idle-w-card/active-no-card/active-w-card) 110/110/190/200 for the M7 and 110/110/160/170 for the H7. Is that correct? The LCD shield is speced to draw (idle-light-off/idle-light-on/active-light-off/active-light-on)...
- Sat May 23, 2020 3:04 pm
- Forum: Project Discussion
- Topic: Flat Field Correction
- Replies: 4
- Views: 2088
Re: Flat Field Correction
I have a global shutter module. I have got to put that thing on my H7 and fire it up. I haven't even used it once yet.
- Sat May 23, 2020 1:30 pm
- Forum: Project Discussion
- Topic: Flat Field Correction
- Replies: 4
- Views: 2088
Re: Flat Field Correction
I know this is an old discussion, but I was just going through forums looking at past threads and found this one. Flat field correction is not performed with image differencing, although dark current correction is. To correct a flat field, you need division. But, I took a glance at the docs and see ...
- Sat May 23, 2020 2:44 am
- Forum: General Topics
- Topic: BAYER: two questions
- Replies: 4
- Views: 489
Re: BAYER: two questions
Whoa, so I actually did understand you correctly. I just couldn't believe it. All right. Thanks a bunch!
- Sat May 23, 2020 2:05 am
- Forum: General Topics
- Topic: BAYER: two questions
- Replies: 4
- Views: 489
Re: BAYER: two questions
Okay, that explains why the IDE shows a deBayered preview. Thanks. I'm not going to say I really understood the rest of the reply quite yet, but I don't want to be a burden about it. I'm not sure what "processed bayer" is. The only processing I can imagine one would do to Bayer data is demosaicing t...
- Fri May 22, 2020 8:30 pm
- Forum: General Topics
- Topic: BAYER: two questions
- Replies: 4
- Views: 489
BAYER: two questions
I have two questions about the BAYER format. First, assuming I set the frame size to full res so there is no downsampling, VGA in my case (this is on an H7), it seems to me that the IDE's preview should be a grayscale image showing a quincunx of illumination pixels for green and two quarter patterns...
- Fri May 22, 2020 3:56 pm
- Forum: General Topics
- Topic: SD card name reverts to NO NAME
- Replies: 3
- Views: 424
Re: SD card name reverts to NO NAME
Interesting. It isn't an important issue, but this isn't about reformatting the card. Something is reverting the name after I rename it. Could be OpenMV, could be the desktop. It's okay. Thanks.
- Fri May 22, 2020 3:54 pm
- Forum: General Topics
- Topic: SD card not recognized
- Replies: 7
- Views: 733
Re: SD card not recognized
Sorry. I didn't mean to be challenging. It was just trying to nail down the things that weren't clear to me yet. Thanks to both of you for all the information. I'll try some other cards and see how it goes.
- Fri May 22, 2020 12:02 pm
- Forum: General Topics
- Topic: SD card not recognized
- Replies: 7
- Views: 733
Re: SD card not recognized
I tried reformatting it as exFAT and it still didn't work in either camera (M7/H7). I'll buy another card, but At 32GB, they aren't so cheap that I want to buy hoards of them in a random search for something that works. I don't mind that they might or might not work. I just wish it was clear what *s...
- Fri May 22, 2020 11:16 am
- Forum: Technical Discussion
- Topic: H7 image "blown out" by IR LEDs
- Replies: 5
- Views: 553
Re: H7 image "blown out" by IR LEDs
Okay, so long as I don't have a defective unit. That was one concern of mine. If it's systemic to the design and you're already aware of it, then don't worry about it. Thank you for the various suggestions. I'll mix them all into an eventual solution.
Cheers!
Cheers!
- Fri May 22, 2020 2:23 am
- Forum: General Topics
- Topic: SD card name reverts to NO NAME
- Replies: 3
- Views: 424
SD card name reverts to NO NAME
Any idea why the SD card reverts its name to NO NAME after you change it on the desktop? Just curious. It's easier to keep track of multiple cameras attached at once if their volumes have distinct names.
- Fri May 22, 2020 2:20 am
- Forum: General Topics
- Topic: SD card not recognized
- Replies: 7
- Views: 733
Re: SD card not recognized
I'm on Mac, not Windows, but if you're asking if I can mount the drive on my Mac, yes, it comes up just fine. What about the class 10 status of the card? Do you know that class 10 cards work or do you recommend a different class perhaps? What class 32GB cards do you have at your disposal for testing...
- Fri May 22, 2020 2:12 am
- Forum: Technical Discussion
- Topic: H7 image "blown out" by IR LEDs
- Replies: 5
- Views: 553
Re: H7 image "blown out" by IR LEDs
I appreciate you theorizing as the problem, but are you saying I have discovered this issue a year after the H7's release and there is next to no discussion about it on the boards? I can't be the first person to run up against this. How do you deal with this exact same issue on your own H7s, of whic...
- Fri May 22, 2020 2:09 am
- Forum: Technical Discussion
- Topic: WIFI shield vs ESP8266
- Replies: 4
- Views: 415
Re: WIFI shield vs ESP8266
Ah. No worries. I'll probably end up buying the shield anyway, just to support the project. It's just that I have all these little 8266s lying around anyway, so I'm looking for ways to leverage them.
Thanks again.
Thanks again.
- Fri May 22, 2020 12:13 am
- Forum: Technical Discussion
- Topic: WIFI shield vs ESP8266
- Replies: 4
- Views: 415
Re: WIFI shield vs ESP8266
Are you saying without your upcoming library it is impossible for me to do it on my own? I figured I could send data from the M7/H7 to the ESP board (whatever one I use) over a serial connection.
- Thu May 21, 2020 11:54 pm
- Forum: Technical Discussion
- Topic: H7 image "blown out" by IR LEDs
- Replies: 5
- Views: 553
H7 image "blown out" by IR LEDs
If I turn on the IR LEDs on my H7 (default sensor and lens), the live preview image in the IDE loses practically all contrast. It's a wash of gray showing just the barest ghost of an image of the scene (if I point at literal lights or the computer screen, the image comes through, although washed out...
- Thu May 21, 2020 10:41 pm
- Forum: General Topics
- Topic: SD card not recognized
- Replies: 7
- Views: 733
SD card not recognized
I have a 32GB SD card that isn't "bad" or dead. I can mount it on my desktop. I formatted it as MS-DOS (FAT32) because that was the format of an 8GB card I have that works fine in two different OpenMV cameras. But the 32GB card never mounts on either camera. Any ideas what the problem might be? I do...
- Thu May 21, 2020 10:12 pm
- Forum: General Topics
- Topic: 940nm IR sensitivity?
- Replies: 2
- Views: 315
Re: 940nm IR sensitivity?
I assumed the filters were built over the sensors, not inside the lenses. I'll look into that. Thanks.
- Thu May 21, 2020 3:35 pm
- Forum: Technical Discussion
- Topic: WIFI shield vs ESP8266
- Replies: 4
- Views: 415
WIFI shield vs ESP8266
I don't mind buying the WIFI shield, but I do happen to have a smattering of WIFI devices lying around the house already, namely multiple ESP8266 based boards and one ESP32 based board, and it would be nice to make use of stuff I already have. I'm tempted to attached one of the ESP8266 boards to an ...
- Thu May 21, 2020 11:58 am
- Forum: General Topics
- Topic: 940nm IR sensitivity?
- Replies: 2
- Views: 315
940nm IR sensitivity?
I realize the built-in IR LEDs are 840nm, which is why we can see them, and I'm fine with the fact that the default included sensor is likely less sensitive to 940nm, but for discreteness, say in a security camera illuminating your porch, you don't necessarily want a visible light on all night long,...
- Thu Jul 18, 2019 11:42 pm
- Forum: General Topics
- Topic: Will OpenMV run Tensorflow 2 models?
- Replies: 3
- Views: 2454
Re: Will OpenMV run Tensorflow 2 models?
Thank you.
- Mon Jul 15, 2019 6:06 pm
- Forum: General Topics
- Topic: Will OpenMV run Tensorflow 2 models?
- Replies: 3
- Views: 2454
Will OpenMV run Tensorflow 2 models?
There's a pretty significant evolution in Tensorflow going on right about now, pertaining to the release of Tensorflow 2. I'm curious if I will be able to run a model trained on TF 2 on OpenMV or if the OpenMV TF development is currently targeting TF in a way that is exclusive to models generated wi...
- Wed Jun 19, 2019 1:47 pm
- Forum: Technical Discussion
- Topic: Anyone launched two copies of IDE on Mac?
- Replies: 3
- Views: 5930
Re: Anyone launched two copies of IDE on Mac?
So, this is all experimental for me. I only just started working with two OpenMVs at the same time this week. The intent is to create a hybrid two-cam system, perhaps connected through SPI for central coordination, in which the cams would do slightly different things. For example, one might object-t...
- Wed Jun 19, 2019 2:42 am
- Forum: Technical Discussion
- Topic: Anyone launched two copies of IDE on Mac?
- Replies: 3
- Views: 5930
Re: Anyone launched two copies of IDE on Mac?
Thanks. I'll look into those features.
- Tue Jun 18, 2019 1:42 am
- Forum: Technical Discussion
- Topic: Anyone launched two copies of IDE on Mac?
- Replies: 3
- Views: 5930
Anyone launched two copies of IDE on Mac?
I would like to run my M7 and H7 simultaneously, presumably from completely independent instances of the IDE, but if I try to run a second copy, it just refocuses on the first running copy. I've never had this problem before. Usually it's pretty easy to run an application multiple times, or run comp...
- Tue Jun 11, 2019 4:09 pm
- Forum: Project Discussion
- Topic: Detect moving object
- Replies: 9
- Views: 6829
Re: Detect moving object
I like optical flow for applications like this. Unlike frame differencing, OF will actually give you the direction and speed of the moving objects in addition to their mere detection. OF is built into the OpenMV APIs I believe. Just dig through the examples some.
- Mon May 27, 2019 10:52 pm
- Forum: Project Discussion
- Topic: maestro polulu
- Replies: 8
- Views: 12423
Re: maestro polulu
Excellent. Thanks for clarifying that.
- Mon May 27, 2019 10:47 pm
- Forum: General Topics
- Topic: Problems with H7 on a Mac
- Replies: 5
- Views: 5692
Re: Problems with H7 on a Mac
I haven't had any trouble with my M7 or H7 on my Mac. Just to confirm, I plugged it in a second ago, and sure enough, the drive popped up on my desktop, mounted and ready to go. I can also interact with it through the IDE. Lastly, I can see it listed under /dev and I can initiate a REPL session via ...
- Mon May 27, 2019 10:48 am
- Forum: Project Discussion
- Topic: maestro polulu
- Replies: 8
- Views: 12423
Re: maestro polulu
I worked with the Pololu SV203 for years. I have about eight of them lying around my house now and have always thought about incorporating them into more recent projects, but like you, I have had to consider how I would interface them. As indicated above, it'll depend on getting a serial connection ...
- Mon May 27, 2019 10:35 am
- Forum: Project Discussion
- Topic: People & Face tracking Robot
- Replies: 5
- Views: 7538
Re: People & Face tracking Robot
There are tensorflow projects for human detection and estimation. Isn't there talk of running TF models on OpenMV? Is it true that we should be able to run essentially any model trained offline on an H7 (module storage constraints of course)?
https://github.com/eldar/pose-tensorflow
https://github.com/eldar/pose-tensorflow
- Fri May 17, 2019 9:45 am
- Forum: General Topics
- Topic: Global Shutter
- Replies: 38
- Views: 43259
Re: Global Shutter
On the whole color debate above, one very application-specific approach would be to record Bayer filter data (i.e., raw sensor data) straight onto the SD card, such that it could be deBayered and processed at a later time. In such a way, one could use a global shutter to record high framerate color ...
- Wed May 15, 2019 9:32 pm
- Forum: General Topics
- Topic: IDE v4.0 vs 2.2.0?
- Replies: 5
- Views: 5801
Re: IDE v4.0 vs 2.2.0?
Ah, I see. It's some cross-platform wrapper around QT. I'm not familiar with that approach to application design. I should really try to jump in here at some point to see if I can help out some.
- Wed May 15, 2019 9:29 pm
- Forum: General Topics
- Topic: IDE v4.0 vs 2.2.0?
- Replies: 5
- Views: 5801
Re: IDE v4.0 vs 2.2.0?
Well, it's built into the app. The Finder pulls that information from a Mac application's package assets. I haven't dived into the source for either the camera or the IDE yet, but I can take a look at it when I get a chance. How is the IDE written? I presume it is a native Cocoa application, right? ...
- Wed May 15, 2019 2:56 am
- Forum: General Topics
- Topic: IDE v4.0 vs 2.2.0?
- Replies: 5
- Views: 5801
Re: IDE v4.0 vs 2.2.0?
If you Get Info on the application, it says v4.0. I just noticed that if I go ahead and run it anyway, the app says it's v2.2.0 in the About box. So, it's just the Info box from the Finder that shows 4.
- Wed May 15, 2019 1:34 am
- Forum: General Topics
- Topic: IDE v4.0 vs 2.2.0?
- Replies: 5
- Views: 5801
IDE v4.0 vs 2.2.0?
The IDE on my Mac from Dec. 2018 is v4.0, but the version available for download is v2.2.0, although surely far more recent. This isn't very important, but may I ask the rationale behind the version numbering for the IDE?
- Wed May 15, 2019 1:17 am
- Forum: General Topics
- Topic: H7 male vs female headers
- Replies: 2
- Views: 4222
Re: H7 male vs female headers
Ha. Okay, I understand. I'm happy to do it the right way. I just wanted to check before I started soldering. It makes particular sense for me to do it that way since I intend to mount the M7 and H7 next to one another, so it will be easier if they are configured the same way.
Cheers!
Cheers!
- Wed May 15, 2019 12:18 am
- Forum: General Topics
- Topic: H7 male vs female headers
- Replies: 2
- Views: 4222
H7 male vs female headers
My H7 and global shutter have arrived. Woo hoo! I see the H7 doesn't come with the headers presoldered, and in fact comes with both a set of one-sided-male and two-sided-male-female headers. The M7 I already have came with the two-sided headers only, and presoldered at that with female pointing out ...
- Sun May 05, 2019 2:01 am
- Forum: General Topics
- Topic: Global Shutter
- Replies: 38
- Views: 43259
Re: Global Shutter
I'm familiar with the exposure trade off and gamma corrective measures. I was experimenting with a 3500 fps camera recently. Thanks.
- Sun May 05, 2019 12:11 am
- Forum: General Topics
- Topic: Global Shutter
- Replies: 38
- Views: 43259
Re: Global Shutter
I'm looking forward to the imminent arrival of my H7 and global shutter. Color is not at all important to me (well, that's overstating it -- given unlimited resources, I would happily *accept* color, haha). My question is about the theoretical 200fps framerate. Do the higher framerates require downs...
- Thu Mar 28, 2019 3:21 pm
- Forum: Technical Discussion
- Topic: Servo controllers: shield vs. PCA9685
- Replies: 2
- Views: 4941
Re: Servo controllers: shield vs. PCA9685
Thanks. That's what I expected.
- Thu Mar 28, 2019 11:51 am
- Forum: Technical Discussion
- Topic: LCD shield compatibility with servo and P&T shields
- Replies: 4
- Views: 5384
Re: LCD shield compatibility with servo and P&T shields
Ah, okay. Thanks.
- Wed Mar 27, 2019 11:28 pm
- Forum: Technical Discussion
- Topic: Servo controllers: shield vs. PCA9685
- Replies: 2
- Views: 4941
Servo controllers: shield vs. PCA9685
I'm curious if there are any technical differences between the servo shield and the PCA9685, found many places online, such as (chosen for no particular reason) https://www.amazon.com/HiLetgo-PCA9685-Channel-12-Bit-Arduino/dp/B01D1D0CX2 . The shield fits nicely onto the OpenMV board profile, and tha...
- Wed Mar 27, 2019 8:47 pm
- Forum: Technical Discussion
- Topic: 5V TTL?
- Replies: 2
- Views: 3757
Re: 5V TTL?
Yes, I noticed the comment about the ADC/DAC line, but serial comms would be over the UART lines. I take your point though. Thanks.
- Wed Mar 27, 2019 6:06 pm
- Forum: Technical Discussion
- Topic: 5V TTL?
- Replies: 2
- Views: 3757
5V TTL?
I see that OpenMV is described as 5V tolerant but 3.3V nominal. Since TTL detects high voltage as anything above 2V, does this imply that OpenMV should communicate over serial just fine in both directions with a 5V device? Assuming the messages would actually get through in both directions (I'm mild...
- Wed Mar 27, 2019 5:13 pm
- Forum: Technical Discussion
- Topic: LCD shield compatibility with servo and P&T shields
- Replies: 4
- Views: 5384
LCD shield compatibility with servo and P&T shields
If I'm understanding the pinouts correctly, the LCD shield should work with the servo shield, which relies exclusively on the I2C pins P4 and P5, but not the pan & tilt shield, which utilizes the servo pins P7, P8, and P9, which would double up on the LCD's use of P7 and P8, right? As a follow-up, w...
- Thu Feb 14, 2019 1:12 pm
- Forum: General Topics
- Topic: exposure and gain control
- Replies: 11
- Views: 6317
Re: exposure and gain control
Are we able to achieve a relatively flat gamma curve? Flat gamma, while often not pleasing to the eye, is very helpful in analysis.
- Tue Feb 12, 2019 7:50 pm
- Forum: General Topics
- Topic: exposure and gain control
- Replies: 11
- Views: 6317
Re: exposure and gain control
I already inquired about adding a global shutter module to my H7 preorder. I hope it all goes smoothly.
My initial project with the M7 has gone well, but I need more juice.
