Search found 117 matches

by chrisPyres66
Wed Oct 16, 2019 4:54 am
Forum: General Topics
Topic: DFU programmation with openmvide
Replies: 4
Views: 294

Re: DFU programmation with openmvide

It works now with the last stm32cubeprogrammer V2.2 at 115200bauds.
by chrisPyres66
Fri Sep 20, 2019 5:04 am
Forum: General Topics
Topic: external smps regulator for STM32H7
Replies: 2
Views: 168

Re: external smps regulator for STM32H7

Yes, or you can just add a fet transistor to switch off and re-on the camera as you need ! I am looking at the moment to have a low consumption for H7, and it is more complicated than F7 : - In standby mode, if you switch off camera, switch on RTC, BACKRAM, SWD GPIO, you can have less than 5µA. - In...
by chrisPyres66
Wed Sep 18, 2019 4:55 am
Forum: General Topics
Topic: external smps regulator for STM32H7
Replies: 2
Views: 168

external smps regulator for STM32H7

Dear all, I was working on web (lol), and i red this st forum post : https://community.st.com/s/question/0D50X0000BI1mZCSQZ/stm32h743-failure-behavior-with-external-core-smps about using external smps regulator in place of internal ldo regulator to save energy for STM32H743. That is right in new stm...
by chrisPyres66
Wed Sep 11, 2019 11:31 am
Forum: General Topics
Topic: OpenIoE
Replies: 3
Views: 370

Re: OpenIoE

What do you mean by DRAM ?
Is a cam connnecting something like here :
https://github.com/scorelab/OpenIoE
?
by chrisPyres66
Tue Sep 10, 2019 11:30 am
Forum: General Topics
Topic: OpenIoE
Replies: 3
Views: 370

OpenIoE

Dear all, I was working on web, lol, and i found this : https://fr.aliexpress.com/item/32882809584.html?srcSns=sns_More&tid=white_backgroup_101&mb=loajGOeM62DJzeK&tt=ae.MailActivity&aff_platform=default&cpt=1568128867367&sk=2Hs2kgGC&aff_trace_key=22b4ff1e021a45148d218e17208b42d3-1568128867367-09391-...
by chrisPyres66
Thu Sep 05, 2019 2:45 am
Forum: General Topics
Topic: DFU programmation with openmvide
Replies: 4
Views: 294

Re: DFU programmation with openmvide

The programmation window appears and does nothing more than 5min. I just installed the last stm32cubeprogrammer V2.1.0 in place of V1.1.0, i dont know if the driver has changed ? I tried with UART3 boot mode and stm32cubeprogrammer but without success. Have you already done it with uart boot mode ? ...
by chrisPyres66
Wed Sep 04, 2019 8:08 am
Forum: General Topics
Topic: DFU programmation with openmvide
Replies: 4
Views: 294

DFU programmation with openmvide

Dear All,

I tried to program the cam H7 in dfu mode with openmvide V2.2 without success, and I could do it with stm32cubeprogrammer V2.1.0 in dfu mode.
Do you know why it does not work anymore with openmvide ?

I join you an image with stm32cubeprogrammer.

Thanks,
by chrisPyres66
Wed Aug 28, 2019 10:38 am
Forum: Technical Discussion
Topic: backup memory during low power mode
Replies: 5
Views: 665

Re: backup memory during low power mode

Dear both, Thanks for your precious help. I could not test it with STM32H7 because deep_sleep.py example does work with it : https://github.com/openmv/openmv/issues/573 But with STM32F7, here is the code which seems to works : import pyb, time, machine, stm rtc = pyb.RTC() rtc.datetime((2019, 4, 29,...
by chrisPyres66
Tue Aug 27, 2019 11:34 am
Forum: Technical Discussion
Topic: backup memory during low power mode
Replies: 5
Views: 665

backup memory during low power mode

Dear all,

I know on STM32F7 and STM32H7, there is a backup sram to use for keeping the configuration during low power mode like deepsleep.
But i dont know how to use it in python code, is it possible ?

Thanks,
by chrisPyres66
Fri Aug 02, 2019 6:07 am
Forum: General Topics
Topic: Size of usb key mounted as openmv
Replies: 7
Views: 2642

Re: Size of usb key mounted as openmv

Yes i know, but the time to transfert image through UART is too long, and my idea was to stock these images temporarely to this flash. I thought the vfs driver manage this page writing but you are right, there are some unstabilities. eg, sometimes all files i had on this flash disappeared, probably ...
by chrisPyres66
Thu Aug 01, 2019 5:46 am
Forum: General Topics
Topic: What is the simplest way to create my own python function ?
Replies: 7
Views: 2921

Re: What is the simplest way to create my own python function ?

Sorry i was not very explicit, because i proposed a solution and dit not with the idea. The idea is to have a template python function included in the github for newbie to understand how it works and test it. I think to do it by myseld, i should - create and add in py directory the files : py_file.c...
by chrisPyres66
Thu Aug 01, 2019 5:21 am
Forum: General Topics
Topic: Size of usb key mounted as openmv
Replies: 7
Views: 2642

Re: Size of usb key mounted as openmv

Well i dont understand what means "filesystem is cached in memory" because : F7 has : - sector (0) for boot of 32k - sector (1, 2, 3) for Fat of 32k each (32k x 3 = 96k) - sector 4 of 128k and sector (5 to 11) of 256k each for firmware each (128k + 7 x 256k = 1920K) H7 has : - sector (0) for boot of...
by chrisPyres66
Thu Jul 25, 2019 2:43 am
Forum: General Topics
Topic: What is the simplest way to create my own python function ?
Replies: 7
Views: 2921

Re: What is the simplest way to create my own python function ?

Is it possible to have a template lib for newbie like there are in imlib_config.h ?
by chrisPyres66
Thu Jul 18, 2019 2:52 am
Forum: General Topics
Topic: OpenMV and robotic arms
Replies: 3
Views: 1519

Re: OpenMV and robotic arms

It is not a function, it is the lens wich is fixed focus or auto focus !
If you use default lens of openmv, it is all fixed focus
by chrisPyres66
Wed Jul 17, 2019 5:06 am
Forum: General Topics
Topic: What is the simplest way to create my own python function ?
Replies: 7
Views: 2921

Re: What is the simplest way to create my own python function ?

Well thanks, but i dont know if i am sure to do a good and generic code well integrated enough to github it...
I tried to do a manual exposition and gain control (MEC and MGC) in function of a ROI luminance in a gray image.
by chrisPyres66
Wed Jul 17, 2019 4:51 am
Forum: General Topics
Topic: OpenMV and robotic arms
Replies: 3
Views: 1519

Re: OpenMV and robotic arms

What i know, you have algorythms to detect circle and rectangle which are the top and the side of a cylinder lol For image recognition, the pre-requesite is to have a sharpen image, and you can have this with - a fixed focus - global shutter - quick exposition - and sharpen algorythm Avoiding to to ...
by chrisPyres66
Tue Jul 16, 2019 11:44 am
Forum: General Topics
Topic: What is the simplest way to create my own python function ?
Replies: 7
Views: 2921

What is the simplest way to create my own python function ?

Dear all, I have some problem of memory size with F7 cam if my python code is too big, not yet with H7, lol To improve this, and my knowledge, i would like to do and integrate my own python function with openmv github source. I have so two questions : - What is the simplest way to create my own pyth...
by chrisPyres66
Fri Jul 12, 2019 6:06 am
Forum: General Topics
Topic: Size of usb key mounted as openmv
Replies: 7
Views: 2642

Size of usb key mounted as openmv

Dear all, When i connect a cam (H7/F7), there is a usb key mounted of 80Ko for F7 and 110Ko for H7 (without an SDCARD of course). I would like to know if it is possible to increase this size of this usb key because the overall size of flash is 2Mo (F7/H7) and the full firmware + bootloader is around...
by chrisPyres66
Fri Jul 05, 2019 5:45 am
Forum: Technical Discussion
Topic: upper quartile
Replies: 4
Views: 5964

Re: upper quartile

Up for memory :)
by chrisPyres66
Thu Jul 04, 2019 8:44 am
Forum: General Topics
Topic: H7 compilation
Replies: 6
Views: 2086

Re: H7 compilation

I installed this : https://github.com/ntfreak/openocd
and
- it works for debugging bootloader (i did an frimware programmation with openmv IDE)
- but i have reset for firmware at led_init( hardfault ), and mp_init during mp_lookuptable(...) if i comment led...
by chrisPyres66
Thu Jul 04, 2019 2:50 am
Forum: General Topics
Topic: H7 compilation
Replies: 6
Views: 2086

Re: H7 compilation

Thanks, I will try this. What is your toolchain to debug H7 or F7 cam ? I would prefer to use the st toolchain, via stm32cubeMxProgrammer configurator and the Atollic True Studio IDE specially now where there is an AI cube package for cnn dedicated for CMSIS-NN. Unfortunately, i dont know how to joi...
by chrisPyres66
Wed Jul 03, 2019 11:55 am
Forum: General Topics
Topic: H7 compilation
Replies: 6
Views: 2086

H7 compilation

Dear All, I try to do my own compilation with H7 cam, and it works, ouhou ! I did it with a virtuallbox i had with ubuntu and qtcreator than i use for F7 cam. For debugging with openocd (0.10.0), gdb-server and baremetal, i downloaded a stm32h7x.cfg here : https://github.com/ntfreak/openocd/blob/mas...
by chrisPyres66
Wed Jul 03, 2019 6:23 am
Forum: General Topics
Topic: cpufreq Pb with OpenMv H7 (V3.4.2)
Replies: 3
Views: 2004

cpufreq Pb with OpenMv H7 (V3.4.2)

Dear All, I dont manage to get worked the cpufreq, here is the code : import sensor, image, time, cpufreq print(cpufreq.get_supported_frequencies()) cpufreq.set_frequency(200) #100 and 200 does not work print( cpufreq.get_current_frequencies() ) sensor.reset() sensor.set_pixformat(sensor.RGB565) sen...
by chrisPyres66
Mon Jul 01, 2019 3:57 am
Forum: Technical Discussion
Topic: Questions on modularity
Replies: 7
Views: 5495

Re: Questions on modularity

Do you think is it possible to do a external ram shield ?
by chrisPyres66
Wed Jun 26, 2019 10:27 am
Forum: Technical Discussion
Topic: Questions on modularity
Replies: 7
Views: 5495

Re: Questions on modularity

Have you have already think about how to add SDRAM for increasing heap, and size of main.py or cnn ?
by chrisPyres66
Wed Jun 26, 2019 4:22 am
Forum: Technical Discussion
Topic: Size of compressed image
Replies: 1
Views: 2327

Size of compressed image

Dear All, I want to take compressed snapshot (VGA/RGB565) with M7 every 3s to send it on UART at 115200bauds. To be sure to have best quality / size ratio, i triy to detect the best Q factor / file size ratio. Here is a code : import sensor, image, pyb, time, gc red_led=pyb.LED(1) red_led.off() sens...
by chrisPyres66
Thu Jun 13, 2019 10:42 am
Forum: Technical Discussion
Topic: upper quartile
Replies: 4
Views: 5964

upper quartile

Dear all, I try to analyse area of image, and i get different values of upper quartile for the same area. Here is the test code : import sensor, image, time sensor.reset() sensor.set_pixformat(sensor.GRAYSCALE) sensor.set_framesize(sensor.QVGA) sensor.skip_frames(time=1000) while(True): img = sensor...
by chrisPyres66
Thu Jun 06, 2019 12:12 pm
Forum: Technical Discussion
Topic: image areas analyse
Replies: 2
Views: 3514

image areas analyse

Dear all, I try to analysesome areas of the image but i am not sure if i do it well because my results are not what i expected. For exemple, i created a bmp image, as i did it for masking, with the background at value 0x00 and an area in the middle with 0xFF value. I tried to do an AND boolean opera...
by chrisPyres66
Thu Jun 06, 2019 11:45 am
Forum: Technical Discussion
Topic: Precision of RGB Gain
Replies: 4
Views: 4764

Re: Precision of RGB Gain

Thanks, I tried to modify the gain register at address 0x00 and read the db gain with sensor.get_gain_db(). Here is the code, and it is not linear between register and the db gain. import sensor, image, time sensor.reset() sensor.set_pixformat(sensor.GRAYSCALE) sensor.set_framesize(sensor.VGA) senso...
by chrisPyres66
Tue Jun 04, 2019 10:53 am
Forum: Technical Discussion
Topic: set gain ceiling
Replies: 4
Views: 5311

Re: set gain ceiling

well, i see
- set_gainceiling : 2, 4, 8, 16 or 32 for x2, x4, x8, x16 or x32
- set_auto_gain : 2 to 32db

But i dont still understand teh relationship between gain and register ?
Thanks,
by chrisPyres66
Tue Jun 04, 2019 9:18 am
Forum: Technical Discussion
Topic: Precision of RGB Gain
Replies: 4
Views: 4764

Precision of RGB Gain

Dear all, I try to understand how works the gain in OV7725 camera and i am lost without speaking about analog gain. Firstly, there is the main gain at register address 0x00 which can be used with these both python functions where the gain is in db : - sensor.set_auto_gain( False, gain_db=(1 to 32db)...
by chrisPyres66
Tue Jun 04, 2019 8:08 am
Forum: Technical Discussion
Topic: set gain ceiling
Replies: 4
Views: 5311

set gain ceiling

Dear all, I try to understand how works the gain in the OV7725 camera, and i stopped on the gain ceiling. To set the gain ceiling there is 2 ways in python : - sensor.set_gainceiling(4) - sensor.set_auto_gain(True, gain_db_ceiling=4) which both write at the COM9 register but the c language codes do ...
by chrisPyres66
Tue Jun 04, 2019 2:42 am
Forum: General Topics
Topic: Do i have to skipframe if i change format or frame size without ressetting ?
Replies: 3
Views: 5195

Re: Do i have to skipframe if i change format or frame size without ressetting ?

Thanks, i effectively met this case.

How can i be sure of the lmean level before taking the first snapshot in RGB565 and VGA configuration ?
by chrisPyres66
Mon Jun 03, 2019 5:48 am
Forum: General Topics
Topic: Do i have to skipframe if i change format or frame size without ressetting ?
Replies: 3
Views: 5195

Do i have to skipframe if i change format or frame size without ressetting ?

Dear all, I have different light conditions and i want to test the lmean before taking the first snapshot. Unfortunately, i cant do sensor.snapshot().histogram().get_statistics() in RGB565 and VGA configuration. Therefore i do it in smaller configuration i change after like this : import sensor, ima...
by chrisPyres66
Mon May 13, 2019 5:04 am
Forum: Technical Discussion
Topic: LBP
Replies: 10
Views: 5966

Re: LBP

well, the uniform matrix is to reduce the number of lbp (256 possibility) to 59 most common.
So it is not usefull to change for specific use.
Thanks,
by chrisPyres66
Fri May 10, 2019 6:16 am
Forum: Technical Discussion
Topic: LBP
Replies: 10
Views: 5966

Re: LBP

Well i understand than lbp_weights has a high value around eyes, medium value for mouth and ear, then low level for cheeks.
If i want to have a neutral use, i can set 1 for all the 7x7 matrix.

I dont understand what is for the uniform_tbl matrix ?
by chrisPyres66
Thu May 09, 2019 10:44 am
Forum: Technical Discussion
Topic: LBP
Replies: 10
Views: 5966

Re: LBP

Thanks,
I red lbp.c and i discovered the weight are optimized for face recognition.
I would like to use for another use, what is the default values, and how can i define it to my own case ?
by chrisPyres66
Thu May 09, 2019 9:01 am
Forum: Technical Discussion
Topic: LBP
Replies: 10
Views: 5966

Re: LBP

Wowwwww, i tested a 6x6 lbp on M7, and it works fine.
Which file from github i have to update to get this ?
Thanks,
by chrisPyres66
Tue May 07, 2019 8:27 am
Forum: Technical Discussion
Topic: LBP
Replies: 10
Views: 5966

Re: LBP

Below is the simplified code, where you can define the number of line and column which define the number of areas where the lbp is defined and checked. I tested the M7 and H7 camera, and both get problem if i increase the number of line and column. With openmv 2.2.0 : For M7 (rev 3.4.1), in VGA : - ...
by chrisPyres66
Mon May 06, 2019 10:49 am
Forum: Technical Discussion
Topic: LBP
Replies: 10
Views: 5966

LBP

Dear All, I use lbp descriptor to recognize a pattern and, to filter local noise, i divide the image in several part with each a lbp descriptor. My problem is if i use more than 4 lbp pattern, whatever the resolution, i have frequently deconnexion and it does not seem stable. Do you have any knowled...
by chrisPyres66
Thu Apr 04, 2019 6:11 am
Forum: General Topics
Topic: Nvidia digits to train cnn with caffe
Replies: 3
Views: 8936

Re: Nvidia digits to train cnn with caffe

Nice, do you have some advice because i dont manage to quantize to openmv camera with : python2 ~/openmv/ml/cmsisnn/nn_quantizer.py --gpu --model ./quantizer.prototxt --weights ./snapshot_iter_240.caffemodel --save ./V22_Lenet.pkl I used a lenet network with my own image set. As nvidia digits is use...
by chrisPyres66
Wed Apr 03, 2019 4:47 am
Forum: General Topics
Topic: Nvidia digits to train cnn with caffe
Replies: 3
Views: 8936

Nvidia digits to train cnn with caffe

Dear all,

Do you know if it is possible to use Nvidia digits software to train CNN and then convert it to openmv ?

Thanks,
by chrisPyres66
Mon Mar 18, 2019 10:04 am
Forum: General Topics
Topic: M7 camera memory solutions
Replies: 1
Views: 3224

M7 camera memory solutions

Dear all, As everybody waiting the new H7 camera, I have M7 camera memory problem with cnn and heap size or heap variable allocation along time. If I would like to improve this, i am not sure to well understand how it works. Flash is divided like this - Bootloader : 32 Ko - Embedded Flash Drive : 96...
by chrisPyres66
Mon Mar 11, 2019 4:47 am
Forum: General Topics
Topic: white and cold image colors for M7 (OV7725) => blur image
Replies: 6
Views: 4230

Re: white and cold image colors for M7 (OV7725) => blur image

Ok i tested this and it seems ok sensor.__write_reg(0x24, 0x40) # New: 0x40 \ default: 0x75 / OPENMV: 0x58 sensor.__write_reg(0x25, 0x30) # New: 0x30 \ default: 0x63 / OPENMV: 0x48 sensor.__write_reg(0x26, 0xa1) # New: 0xa1 \ default: 0xD4 / OPENMV: 0xC3 sensor.__write_reg(0x0d, 0x71) # New: 0x71 \ ...
by chrisPyres66
Fri Mar 08, 2019 6:01 am
Forum: General Topics
Topic: white and cold image colors for M7 (OV7725) => blur image
Replies: 6
Views: 4230

Re: white and cold image colors for M7 (OV7725) => blur image

Dear, In place of turning auto gain and auto white balance off after 200ms, i changed the camera registers AEW and AEB in helloworld.py like this : import sensor, image, time sensor.reset() sensor.set_pixformat(sensor.RGB565) sensor.set_framesize(sensor.VGA) sensor.__write_reg(0x24, 0x40) #New: 0x40...
by chrisPyres66
Wed Feb 27, 2019 6:23 am
Forum: General Topics
Topic: white and cold image colors for M7 (OV7725) => blur image
Replies: 6
Views: 4230

white and cold image colors for M7 (OV7725) => blur image

Dear all, I have got another camera with OV7725 and the image colors are more hot and more red compare to the M7 which the colors are more white and cold. This whiteness seems to blur the images like big aperture reduce depth of field. This other camera uses the OV529 ftom omnivision too, i dont kno...
by chrisPyres66
Thu Feb 14, 2019 4:47 am
Forum: General Topics
Topic: exposure and gain control
Replies: 11
Views: 4750

Re: exposure and gain control

lol, ok you mean the last current firmware.

I am not sure which function does this gamma correction.
Is it the function for histogram ?

Thanks,
by chrisPyres66
Wed Feb 13, 2019 7:57 am
Forum: General Topics
Topic: exposure and gain control
Replies: 11
Views: 4750

Re: exposure and gain control

Hi, the camera doesn't support gain/exposure for a small part of the image. As for the min and maxes, the gain has a max of 32 or so. The exposure isn't really limited by anything. But, if you set it very high the FPS will go to near 0. The exposure is based on the pixel readout line times which we...
by chrisPyres66
Tue Feb 12, 2019 11:39 am
Forum: General Topics
Topic: exposure and gain control
Replies: 11
Views: 4750

exposure and gain control

Dear all, As i use a small part of the image, i try to control the exposure and gain to have the highest contrast with different ambiant lights. Is there a possibility to have the automatic gain and exposure control on a small part of the image ? sensor.set_windowing((128,128)) only cut the image (w...

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