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Questions tagged [image-geometry]

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How to scale gazebo garden camera_info with resolution

for background, I'm detecting the pose of objects based on detected pixels using image_geometry. I've tested this code IRL with an oak-d and found it accurate against a ground truth, so it's working ...
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vision_opencv install/build error

I have been trying to install the ROS package called vision_opencv, in order to run some OpenCV 3.2 code with ROS Kinetic on a Parrot 1.0 AR Drone. I tried the ...
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linking problem with vision_opencv

Hi my question is of two folds. First, I am confused as why there are opencv3 and OpenCV-3.1.0-dev packages is in /opt/ros/indigo/share as i have read that opencv 2.4.8 is the default version of ROS ...
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3 answers
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PinholeCameraModel::project3dToPixel is correct?

I'm a beginner about camera geometry. I would like to understand PinholeCameraModel::project3dToPixel function. PinholeCameraModel::project3dToPixel I derived ...
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1 answer
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image_geometry projectPixelTo3dRay World Coordinates

Good evening, i have a problem and i need help as fast as possible. For a tracking program i try to subscribe from two image_rect_color + their ...
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transformed coordinates negated and in wrong order

I'm trying to get the example code here: http://wiki.ros.org/image_geometry/Tutorials/ProjectTfFrameToImage ... to project object positions from gazebo into an image frame. To get it to work correctly,...
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1 answer
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Project point cloud to image coordinates using camerainfo

Hi, I'm new to ROS (and PCL as well) so sorry if the question is too trivial...but I've been searching for quite a long time and couldn't find an answer.. I have the pointcloud and I need to project ...
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image_geometry::PinholeCameraModel - operator= missing

Hi, is it possible, that the operator=() is missing in the image_geometry::PinholeCameraModel? The following assertion is not true as expected. ...
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1 answer
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ROS Answers SE migration: Tree frames tf

Hi, This is my scenario: image description http://subir.cc/images/img201ryr.jpg In a node I publish the webcam image and retrieve the coordinates x,y when the user clicks on the screen. After I ...
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1 answer
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question about projectpixelto3dray

Hi I have a question about the function projectPixelTo3dRay, according to the API the return value is a 3d ray passing through (u,v). But what does that mean? Why Z is 1? How I can calculate the point ...
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Intersect ray with plane ground

Hi I have a webcam, and after calibrating with camera_calibration I created a program that when you click a part of the image will return pixel coordinates. Assuming that the camera is on the ground, ...
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1 answer
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image_geometry Rectification -> remove black Pixels

Hi I decided to do all Camera Stuff ith die image_geometry class provided by the opencv package. Prior I rectified my camera image with: getOptimalNewCameraMatrix initUndistortRectifyMap remap This ...
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callback needs access to multiple topics - how?

I'm trying to do some processing on images published by a kinect but this is a general camera-related question. I would like to use the image_geometry functions contained in the PinholeCameraModel for ...
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Stereovslam error :: Assertion `left_.tfFrame() == right_.tfFrame()'

After i publish my two left and right videos from stereo camera and run stereo_synchronizer node and stereo_image_proc node everything seems to go file but i get this error from stereo_vslam_node and ...
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1 answer
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Camera_model segfault. Does it require a "real" camera_info not to crash?

Hello, I am working on a node that colors point clouds with a camera image. My strategy is to project each point on the camera image plane, and find the corresponding pixel color. In order to do so, I ...
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1 answer
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problems with the ray in projectPixelTo3dRay

According to the API, the return value is "the unit vector in the camera coordinate frame in the direction of rectified pixel" (from 1.4 is not unit, but with unit z component). I expected ...
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1 answer
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image_geometry project3d to pixel

I'm getting multiple projections of 3d points to the same pixel which don't coincide with the 3D ray but parallel with the image plane. This can be seen here: I'm unable to find an error in my code ...
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sync problem in stereo image

modified stereo_camera_model.cpp in image_geometry, now I can receive /stereo/disparity message, but still there is problem in image sync when I want to view by: rosrun image_view stereo_view stereo:=...
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