It is a 400*400 ov426 sensor which sends 10 bit raw RGB images, bayer bggr. The camera datasheet not public, so I have minimal informations (already write multiple email for the vendor about the datashett, but no response yet), for example I do not know what should the camera see. But based on my experiences with a different cemara module i think this test pattern looks strange, also checking the picture when the pattern turned off the colors look odd.
#include <vector>
#include <iostream>
#include <fstream>
#include <stdio.h>
#include <opencv2/opencv.hpp>
#include <opencv2/highgui/highgui.hpp>
int main()
{
cv::VideoCapture cap(0);
cap.set(cv::CAP_PROP_CONVERT_RGB, false);
cap.set(cv::CAP_PROP_FORMAT, -1);
if (!cap.isOpened()) {
std::cout << "Error opening video stream or file" << std::endl;
return -1;
}
std::ofstream pixel;
pixel.open("bayer.csv");
cv::Mat image; /* Video frame placeholder */
cap >> image;
std::cout<<"RGB: "<<cap.get(cv::CAP_PROP_CONVERT_RGB)<<" format: "<<cap.get(cv::CAP_PROP_FORMAT)<<" frame: "<<cap.get(cv::CAP_PROP_FRAME_WIDTH)<<std::endl;
int frame_size = image.dataend - image.datastart;
std::cout<<"frame size: "<<frame_size<<" shape: "<<image.dims<<std::endl;
std::cout<<"frame o dim: "<<image.dims<<" type: "<<image.type()<<" byte elements: "<<image.elemSize()<<" elements: "<<image.total()<<" rows: "<<image.rows<<" cols: "<<image.cols<<std::endl;
while (1)
{
cap >> image;
/* 1. Capture image as RGB555 -> [X R R R R R G G G G G B B B B B] */
std::vector<unsigned short int> data; /* Placeholder for all image pixels */
std::vector<unsigned short int> sdata;
for (int i = 0; i < frame_size; i += 3) {
data.push_back(0xFFC0 & ((image.data[i + 2]) << 10 | ((image.data[i + 1]) << 5) | (image.data[i])));
}
cv::Mat img_bayer = cv::Mat(image.rows, image.cols, CV_16U);
cv::Mat img_bayer2 = cv::Mat(image.rows, image.cols, CV_16U);
cv::Mat img_bayer8 = cv::Mat(image.rows, image.cols, CV_8U);
cv::Mat rgb_bayer = cv::Mat(image.rows, image.cols, CV_16U);
cv::Mat img_rgb = cv::Mat(image.rows, image.cols, CV_16UC3);
cv::Mat img_converted;
cv::imshow("bggr",bggr);
memmove(img_bayer.data, data.data(), data.size() * 2);
memmove(img_bayer2.data, data.data(), data.size() * 2);
memmove(img_bayer8.data, data.data(), data.size());
memmove(img_rgb.data, data.data(), sdata.size() * 2);
cv::imshow("img_bayer",img_bayer);
cv::imshow("img_bayergb",img_bayer8);
cv::Mat bayered(400,400,CV_8UC3,cv::Scalar(255));
cv::Mat rgb(400,400,CV_8UC3,cv::Scalar(0));
for(int i=0;i<400;i++)
{
//cv::Vec3b* rpixels = bggr.ptr<cv::Vec3b>(i);
if(i%2==0)
{
for(int j=0;j<400;j++)
{
if(j%2==0)
{
bayered.at<cv::Vec3b>(i,j)[0] = img_bayer.at<uchar>(i,j);//b
bayered.at<cv::Vec3b>(i,j)[1] = 0;//g
bayered.at<cv::Vec3b>(i,j)[2] = 0;//r
}
else
{
bayered.at<cv::Vec3b>(i,j)[0] = 0;//b
bayered.at<cv::Vec3b>(i,j)[1] = img_bayer.at<uchar>(i,j);//g
bayered.at<cv::Vec3b>(i,j)[2] = 0;//r
}
}
}
else
{
for(int j=0;j<400;j++)
{
if(j%2==0)
{
bayered.at<cv::Vec3b>(i,j)[0] = 0;//b
bayered.at<cv::Vec3b>(i,j)[1] = img_bayer.at<uchar>(i,j);//g
bayered.at<cv::Vec3b>(i,j)[2] = 0;//r
}
else
{
bayered.at<cv::Vec3b>(i,j)[0] = 0;//b
bayered.at<cv::Vec3b>(i,j)[1] = 0;//g
bayered.at<cv::Vec3b>(i,j)[2] = img_bayer.at<uchar>(i,j);//r
}
}
}
}
cv::imshow("ori", img_bayer2);
cv::imshow("bayered", bayered);
cv::cvtColor(img_bayer2, rgb, cv::COLOR_BayerRG2BGR);
cv::imshow("Display rgb", rgb);
cv::cvtColor(img_bayer, rgb, cv::COLOR_BayerRG2RGB);
cv::imshow("Display rgb2", rgb);
if ((char)cv::waitKey(5) >= 0)
break;
}
return 0;
}
