Hello, Im writing an own Camera class in C++. In this function: `cv::Mat Mono_camera::get_data(dai::Device& device) {` ` std::shared_ptr mono_queue = device.getOutputQueue("mono_right_out", 4, false);` `auto inMono = mono_queue->get();` `if(inMono){` `cv::Mat frame = inMono->getCvFrame();` ` }` `return frame;` `}` Im getting the following error message: error: conversion from ‘void’ to non-scalar type ‘cv::Mat’ requested 11 | cv::Mat frame = inMono->getCvFrame();

@"jhund"#p24310 The method should return a cv::Mat... Maybe try with `getFrame()`. [upl-image-preview url=https://discuss.luxonis.com/assets/files/2024-07-17/1721228942-87566-image.png] Thanks, Jaka

@"jhund"#p24643 hello,I met a similar question in /usr/local/include/depthai/pipeline/datatype/PointCloudData.hpp error: conversion from ‘void’ to non-scalar type ‘pcl:: PointCloud:: Ptr’ {aka ‘boost::shared_ptr’} requested 78 | pcl:: PointCloud[pcl:: PointXYZ](pcl::PointXYZ)::Ptr cloud = pclMsg->getPclData(); do you know what I should link to solve this quetion I have tried depthai::pcl ,but it is not true

@"yyh0702"#p27851 How did you build the depthai library? To enable PCL support, follow the [readme](https://github.com/luxonis/depthai-core?tab=readme-ov-file#dependencies). Thanks, Jaka

Converting dai::ImgFrame to cv::Mat

jhund

Hello,

Im writing an own Camera class in C++.

In this function:

cv::Mat Mono_camera::get_data(dai::Device& device) {

std::shared_ptr<dai::DataOutputQueue> mono_queue = device.getOutputQueue("mono_right_out", 4, false);

auto inMono = mono_queue->get<dai::ImgFrame>();

if(inMono){

cv::Mat frame = inMono->getCvFrame();

}

return frame;

}

Im getting the following error message:
error: conversion from ‘void’ to non-scalar type ‘cv::Mat’ requested

11 | cv::Mat frame = inMono->getCvFrame();

jakaskerl

jhund
The method should return a cv::Mat...
Maybe try with getFrame().

Thanks,
Jaka

jhund

Linking to depthai::opencv instead of depthai::core solved the problem

yyh0702

jhund hello,I met a similar question in
/usr/local/include/depthai/pipeline/datatype/PointCloudData.hpp

error: conversion from ‘void’ to non-scalar type ‘pcl:: PointCloud<[pcl:: PointXYZ](pcl:😛ointXYZ)>:: Ptr’ {aka ‘boost::shared_ptr<pcl:: PointCloud[pcl:: PointXYZ](pcl:😛ointXYZ) >’} requested

78 | pcl:: PointCloud[pcl:: PointXYZ](pcl:😛ointXYZ):😛tr cloud = pclMsg->getPclData();

do you know what I should link to solve this quetion
I have tried depthai::pcl ,but it is not true

jakaskerl

yyh0702
How did you build the depthai library?
To enable PCL support, follow the readme.

Thanks,
Jaka