id stringlengths 16 145 | text stringlengths 1 179k | title stringclasses 1
value |
|---|---|---|
picamera_basic_advanced_recipes/imshowpythonmacosnot_33_0.txt | [ edit ](/questions/207755/edit/) [ retag ](/s/questions/207755/retag/) flag
offensive [ close ](/questions/207755/close/) merge delete | |
picamera_basic_advanced_recipes/18461_94_0.txt | ### | |
picamera_basic_advanced_recipes/18461_280_0.txt | **[ scipioni ](/scipioni) ** commented Jul 7, 2022 | |
picamera_basic_advanced_recipes/18461_305_0.txt | [
](/shaojunjie0912) | |
picamera_basic_advanced_recipes/18461_281_0.txt | this mapping **-v /tmp/.X11-unix:/tmp/.X11-unix** solved for me | |
picamera_basic_advanced_recipes/picamera_basic_recipes_7_0.txt | ## 3.7. Capturing in low light ¶
Using similar tricks to those in Capturing consistent images , the Pi’s
camera can capture images in low light conditions. The primary objective is to
set a high gain, and a long exposure time to allow the camera to gather as
much light as possible. However, the [ ` shutter_speed ... | |
picamera_basic_advanced_recipes/picamera_basic_recipes_5_0.txt | ## 3.5. Capturing consistent images ¶
You may wish to capture a sequence of images all of which look the same in
terms of brightness, color, and contrast (this can be useful in timelapse
photography, for example). Various attributes need to be used in order to
ensure consistency across multiple shots. Specifically, ... | |
picamera_basic_advanced_recipes/18461_142_0.txt | Copy link | |
picamera_basic_advanced_recipes/18461_303_0.txt | [ "Can't initialize GTK backend in function 'cvInitSystem'" Xilinx/Vitis-
AI#1107 ](/Xilinx/Vitis-AI/issues/1107) | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_72_0.txt | [ __ GitHub ](https://github.com/opencv) | |
picamera_basic_advanced_recipes/picamera_advanced_recipes_4_0.txt | ## 4.4. Unencoded image capture (RGB format) ¶
The RGB format is rather larger than the [ YUV
](https://en.wikipedia.org/wiki/YUV) format discussed in the section above,
but is more useful for most analyses. To have the camera produce output in [
RGB ](https://en.wikipedia.org/wiki/RGB) format, you simply need to sp... | |
picamera_basic_advanced_recipes/243406_33_0.txt | [ Houber ](https://forums.developer.nvidia.com/u/Houber) February 20, 2023,
6:13am 14 | |
picamera_basic_advanced_recipes/18461_11_0.txt | * [ Enterprise ](https://github.com/enterprise)
* [ Teams ](https://github.com/team)
* [ Startups ](https://github.com/enterprise/startups)
* [ Education ](https://education.github.com) | |
picamera_basic_advanced_recipes/18461_258_0.txt | ### | |
picamera_basic_advanced_recipes/18461_109_0.txt | Copy link | |
picamera_basic_advanced_recipes/18461_148_0.txt | Sorry, something went wrong. | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_74_0.txt | [ __ Documentation ](https://docs.opencv.org) | |
picamera_basic_advanced_recipes/18461_276_0.txt | Sorry, something went wrong. | |
picamera_basic_advanced_recipes/18461_263_0.txt | 2- at docker run command add the following:
` docker run --"all your other tags" -e DISPLAY=$DISPLAY -v /tmp/.X11-unix:
/tmp/.X11-unix "image id" ` | |
picamera_basic_advanced_recipes/18461_26_0.txt | [ Search syntax tips ](https://docs.github.com/search-github/github-code-
search/understanding-github-code-search-syntax) | |
picamera_basic_advanced_recipes/18461_117_0.txt | Copy link | |
picamera_basic_advanced_recipes/18461_362_0.txt | You succeed to slove this problem to WSL? | |
picamera_basic_advanced_recipes/243406_21_0.txt | [ 
2023-02-16 17-12-33屏幕截图 733×457 86.6 KB ](https://global.discourse-
cdn.com/nvidia/original/3X/a/2/a265f084e2da6f78d8da344dfab218d923b0575a.png
"2023-02-16 17-12-33屏幕截图") | |
picamera_basic_advanced_recipes/picamera_basic_recipes_8_1.txt | connection.close()
client_socket.close()
The server script should be run first to ensure there’s a listening socket
ready to accept a connection from the client script.
| |
picamera_basic_advanced_recipes/18461_330_0.txt | Sorry, something went wrong. | |
picamera_basic_advanced_recipes/18461_65_0.txt | ##### System information (version) | |
picamera_basic_advanced_recipes/18461_341_0.txt | [ 
](/anvinder) | |
picamera_basic_advanced_recipes/243406_4_0.txt | [ Houber ](https://forums.developer.nvidia.com/u/Houber) February 20, 2023,
1:44am 1 | |
picamera_basic_advanced_recipes/sshx11forwardingprob_15_0.txt | Information: | |
picamera_basic_advanced_recipes/18461_274_0.txt | --- | |
picamera_basic_advanced_recipes/picamera_basic_recipes_11_0.txt | ## 3.11. Recording over multiple files ¶
If you wish split your recording over multiple files, you can use the [ `
split_recording() ` ](api_camera.html#picamera.PiCamera.split_recording
"picamera.PiCamera.split_recording") method to accomplish this:
import picamera
camera = picamera.PiCamer... | |
picamera_basic_advanced_recipes/18461_69_0.txt | ExternalProject_Add(opencv
GIT_REPOSITORY https://github.com/opencv/opencv
GIT_TAG "3.4"
SOURCE_DIR opencv
BINARY_DIR opencv-build
CMAKE_ARGS
-DCMAKE_BUILD_TYPE=RELEASE
-DFORCE_VTK=ON
-DWITH_TBB=ON
-DWITH_V4L=ON
-DWITH_QT=OFF
-DWITH_GTK_2_x=ON
-DWITH_OPENGL=ON
-DCMAKE_INSTALL_PREFIX=${CMAKE_BINARY_DIR}/opencv_install
)... | |
picamera_basic_advanced_recipes/18461_350_0.txt | Copy link | |
picamera_basic_advanced_recipes/18461_124_0.txt | We don't help with remote investigation of problems which we are not able to
reproduce on our side (because it is very time consuming and usually
configuration problem without any following fix into OpenCV), but we can take
a look on **the clear reason of the problem** and suggest some fix/workaround. | |
picamera_basic_advanced_recipes/18461_309_0.txt | > it works！ | |
picamera_basic_advanced_recipes/picamera_basic_recipes_3_0.txt | ## 3.3. Capturing to a PIL Image ¶
This is a variation on Capturing to a stream . First we’ll capture an image
to a [ ` BytesIO ` ](https://docs.python.org/3.4/library/io.html#io.BytesIO
"\(in Python v3.4\)") stream (Python’s in-memory stream class), then we’ll
rewind the position of the stream to the start, and ... | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_100_0.txt | *[
2019-01-23 17:22:41 -0600
]: 2019-01-23 17:22:41 -0600
*[
2019-01-24 07:21:53 -0600
]: 2019-01-24 07:21:53 -0600
*[
2019-01-24 01:55:37 -0600
]: 2019-01-24 01:55:37 -0600
*[
2019-01-24 06:23:34 -0600
]: 2019-01-24 06:23:34 -0600
*[
2019-01-24 06:50:40 -0600
]: 2019-01-24 06:50:40 -0600
*[
2019-01-24 06:56:32 -0600
]... | |
picamera_basic_advanced_recipes/18461_306_0.txt | Copy link | |
picamera_basic_advanced_recipes/18461_308_0.txt | **[ shaojunjie0912 ](/shaojunjie0912) ** commented Feb 8, 2023 | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_25_0.txt | Any ideas what I might be doing wrong? | |
picamera_basic_advanced_recipes/243406_0_0.txt | [ NVIDIA Developer Forums ](/) | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_81_0.txt | Seen: **13,560 times** | |
picamera_basic_advanced_recipes/243406_12_0.txt | i really need some help urgently, please! | |
picamera_basic_advanced_recipes/sshx11forwardingprob_25_0.txt | Original Poster
Rep: Reputation: Disabled
Problem is not related with DISPLAY variable.
The problem is related with compositor. In our system, wayland based compositor is used by default.
I get opencv with apt-get install. This opencv libraries don't support wayland based compositor.
This is our problem.
Thanks for you... | |
picamera_basic_advanced_recipes/18461_301_0.txt | Sorry, something went wrong. | |
picamera_basic_advanced_recipes/18461_176_0.txt | this method is effective | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_11_0.txt | * [ python3 ](/questions/scope:all/sort:activity-desc/tags:python3/page:1/) | |
picamera_basic_advanced_recipes/18461_345_0.txt | I still have the problem. I am not doing ssh or using vnc. It's a rpi4 and the
cv2.imshow function works fine if i run the script myself but when i do it via
crontab or rc.local during boot then i see the error "can't initialize gtk
backend in function 'cvinitsystem'" | |
picamera_basic_advanced_recipes/18461_349_0.txt | [
](/Nandu3219) | |
picamera_basic_advanced_recipes/picamera_basic_recipes_14_0.txt | ## 3.14. Overlaying images on the preview ¶
The camera preview system can operate multiple layered renderers
simultaneously. While the picamera library only permits a single renderer to
be connected to the camera’s preview port, it does permit additional renderers
to be created which display a static image. These ov... | |
picamera_basic_advanced_recipes/18461_88_0.txt | --- | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_46_0.txt | there is a close issue [ here ](https://github.com/opencv/opencv/issues/8885)
. is it same problem | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_15_0.txt | [ AnnaMP ](/users/414443/annamp/)
36 ● 1 ● 4 | |
picamera_basic_advanced_recipes/18461_202_0.txt | Sorry, something went wrong. | |
picamera_basic_advanced_recipes/18461_154_0.txt | --- | |
picamera_basic_advanced_recipes/243406_9_0.txt | i put it on the tx2 forum originally, but | |
picamera_basic_advanced_recipes/picamera_basic_recipes_1_0.txt | ## 3.1. Capturing to a file ¶
Capturing an image to a file is as simple as specifying the name of the file
as the output of whatever [ ` capture() `
](api_camera.html#picamera.PiCamera.capture "picamera.PiCamera.capture")
method you require:
from time import sleep
from picamera import PiCamera
... | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_80_0.txt | Asked: ** 2019-01-23 17:22:41 -0600 ** | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_21_0.txt | cv2.imshow('Butterfly', img)
cv2.waitKey(0)
cv2.destroyAllWindows() | |
picamera_basic_advanced_recipes/18461_255_0.txt | Sorry, something went wrong. | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_95_0.txt | [ about ](/about/) | [ faq ](/faq/) | [ help ](/help/ "help") | [ privacy
policy ](/privacy/) | [ terms of service ](/terms/) | |
picamera_basic_advanced_recipes/18461_292_0.txt | All reactions | |
picamera_basic_advanced_recipes/sshx11forwardingprob_9_0.txt | Exclusive for LQ members, get up to 45% off per month. Click here for more info. | |
picamera_basic_advanced_recipes/18461_42_0.txt | * * [ Notifications ](/login?return_to=%2Fopencv%2Fopencv)
* [ Fork 55.6k ](/login?return_to=%2Fopencv%2Fopencv)
* [ Star 75.7k ](/login?return_to=%2Fopencv%2Fopencv) | |
picamera_basic_advanced_recipes/18461_47_0.txt | **Have a question about this project?** Sign up for a free GitHub account to
open an issue and contact its maintainers and the community. | |
picamera_basic_advanced_recipes/18461_217_0.txt | **[ erdemozc ](/erdemozc) ** commented Jun 25, 2021 | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_62_0.txt | Sort by » [ oldest ](/question/207755/imshow-pythonmacos-not-showing-the-
image/?sort=oldest#sort-top) [ newest ](/question/207755/imshow-pythonmacos-
not-showing-the-image/?sort=latest#sort-top) [ most voted
](/question/207755/imshow-pythonmacos-not-showing-the-image/?sort=votes#sort-
top) | |
picamera_basic_advanced_recipes/picamera_advanced_recipes_10_1.txt | h picamera.PiCamera(resolution='640x480', framerate=24) as camera:
output = StreamingOutput()
camera.start_recording(output, format='mjpeg')
try:
address = ('', 8000)
server = StreamingServer(address, StreamingHandler)
server.serve_forever()
finally:
... | |
picamera_basic_advanced_recipes/18461_376_0.txt | No branches or pull requests | |
picamera_basic_advanced_recipes/18461_46_0.txt | New issue | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_96_0.txt | [ Powered by Askbot version 0.10.2 ](http://askbot.com) | |
picamera_basic_advanced_recipes/18461_243_0.txt | All reactions | |
picamera_basic_advanced_recipes/18461_335_0.txt | If you use SSH to connect you divice or your progress is a server ,and nowhere
to display any image.So please remove the code related windows or display.for
example imshow() | |
picamera_basic_advanced_recipes/18461_102_0.txt | ### | |
picamera_basic_advanced_recipes/picamera_advanced_recipes_17_2.txt | [ Builds ](//readthedocs.org/builds/picamera/?fromdocs=picamera)
* * *
Free document hosting provided by [ Read the Docs
](http://www.readthedocs.org) .
| |
picamera_basic_advanced_recipes/18461_223_0.txt | [ what are the minimum dependancies for zed image capture?[Question]
stereolabs/zed-sdk#424 ](/stereolabs/zed-sdk/issues/424) | |
picamera_basic_advanced_recipes/18461_190_0.txt | All reactions | |
picamera_basic_advanced_recipes/243406_28_0.txt | diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5c588b9..fa233db 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -37,5 +37,5 @@ target_link_libraries(${PROJECT_NAME} vpi opencv_core opencv_imgproc)
if(OpenCV_VERSION VERSION_LESS 3)
target_link_libraries(${PROJECT_NAME} opencv_highgui)
else()
- target_link_lib... | |
picamera_basic_advanced_recipes/picamera_advanced_recipes_15_1.txt | .parent.i_frames = 0
self.parent.p_frames = 0
super(MyEncoder, self).start(output, motion_output)
def _callback_write(self, buf):
# Only count when buffer indicates it's the end of a frame, and
# it's not an SPS/PPS header (..._CONFIG)
if (
... | |
picamera_basic_advanced_recipes/18461_298_0.txt | thank u, your answer solved my problem | |
picamera_basic_advanced_recipes/sshx11forwardingprob_30_0.txt | import cv2
from PIL import Image UPSers.com | |
picamera_basic_advanced_recipes/18461_130_0.txt | Closed | |
picamera_basic_advanced_recipes/18461_108_0.txt | [
](/IstiakFahim28) | |
picamera_basic_advanced_recipes/18461_319_0.txt | I had to comment imshow() and also corresponding namedWindow() created for
imshow(). Then my issue is resolved.
I faced same problem with OpenCV 4.7 | |
picamera_basic_advanced_recipes/18461_357_0.txt | [
](/arielkantorovich) | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_18_0.txt | I know that the image is loaded correctly, because I'm printing out the arrays
and image data looks right. Also I can see that the window always has the
correct _measurements_ for whichever image file I'm picking. | |
picamera_basic_advanced_recipes/18461_364_0.txt | All reactions | |
picamera_basic_advanced_recipes/18461_89_0.txt | All reactions | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_52_0.txt | can you use opencv-python 3.3 | |
picamera_basic_advanced_recipes/18461_314_0.txt | Copy link | |
picamera_basic_advanced_recipes/18461_36_0.txt | Cancel Create saved search | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_88_0.txt | [ jpg does not show ](/question/11057/jpg-does-not-show/) | |
picamera_basic_advanced_recipes/sshx11forwardingprob_22_0.txt | Rep: Reputation: 856Reputation: 856Reputation: 856Reputation: 856Reputation: 856Reputation: 856Reputation: 856
I think you need to set the DISPLAY variable to your host ip not localhost which will be the ip of the board | |
picamera_basic_advanced_recipes/18461_272_0.txt | > To help others, I found that my .bashrc needed to contain the following: `
> export DISPLAY=:0.0 ` previously, it said ` export DISPLAY=localhost:0.0 ` | |
picamera_basic_advanced_recipes/imshowpythonmacosnot_10_0.txt | * [ OSX ](/questions/scope:all/sort:activity-desc/tags:OSX/page:1/) | |
picamera_basic_advanced_recipes/18461_318_0.txt | > I managed to solve it by making sure when I ssh into aarch64 that I use ssh
> -Y user@host. This gives authorization to allow cv2.imshow() to display the
> window. [ gtk_init_check error solved
> ](https://unix.stackexchange.com/questions/94497/org-eclipse-swt-swterror-
> no-more-handles-gtk-init-check-failed-while-r... | |
picamera_basic_advanced_recipes/picamera_advanced_recipes_0_0.txt | [ Picamera ](index.html)
release-1.13
* [ 1\. Installation ](install.html)
* [ 2\. Getting Started ](quickstart.html)
* [ 3\. Basic Recipes ](recipes1.html)
* 4\. Advanced Recipes
* 4.1. Capturing to a numpy array
* 4.2. Capturing to an OpenCV object
* 4.3. Unencoded image capture (YUV format) ... | |
picamera_basic_advanced_recipes/18461_56_0.txt | # error: (-2:Unspecified error) Can't initialize GTK backend in function
'cvInitSystem' #18461 | |
picamera_basic_advanced_recipes/18461_283_0.txt | All reactions | |
picamera_basic_advanced_recipes/18461_122_0.txt | * * * |
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