Ribs's profile - activity

thanks, thdrksdfthmn. I'll try that.

Hey guys, I'm trying to crop an image in its contours.

No, I don't want to use boundingRect(). I want only the exact contours. How can I do that?

Here is what I have:

threshold(image, threshImg, 0, 255, CV_THRESH_BINARY );
cvtColor(threshImg, threshImg, CV_RGB2GRAY, 1);
findContours( threshImg, contours, CV_RETR_EXTERNAL, CV_CHAIN_APPROX_SIMPLE );

How can I crop the image with these contours? I drew the contours. They are exactly what I want.

Hey guys, I'm trying to crop an image in its contours.

No, I don't want to use boundingRect(). I want only the exact contours. How can I do that?

Here is what I have:

threshold(image, threshImg, 0, 255, CV_THRESH_BINARY );
cvtColor(threshImg, threshImg, CV_RGB2GRAY, 1);
findContours( threshImg, contours, CV_RETR_EXTERNAL, CV_CHAIN_APPROX_SIMPLE );

How can I crop the image with these contours? I drew the contours. They are exactly what I want.

thanks man

ok, and I found this code:

if (i == 1) {
        Rect newSize(0, 0, tmp.cols * 2 / 5, tmp.rows);
        roi1.push_back(newSize);
        rois.push_back(roi1);
        roi1.clear();
    } else if (i == argc - 2) {
        Rect newSize(tmp.cols * 3 / 5, 0, tmp.cols * 2 / 5, tmp.rows);
        roi2.push_back(newSize);
        rois.push_back(roi2);
        roi2.clear();
    } else {
        Rect newSize(0, 0, tmp.cols * 2 / 5, tmp.rows);
        roi1.push_back(newSize);
        newSize = cvRect(tmp.cols * 3 / 5, 0, tmp.cols * 2 / 5, tmp.rows);
        roi1.push_back(newSize);
        rois.push_back(roi1);
        roi1.clear();
    }

and it worked. But I didn't understand the values 2/5 and 3/5.

error:

OpenCV Error: Assertion failed (0 <= roi.x && 0 <= roi.width && roi.x + roi.width <= m.cols && 0 <= roi.y && 0 <= roi.height && roi.y + roi.height <= m.rows) in Mat, file /opt/local/var/macports/build/_opt_mports_dports_graphics_opencv/opencv/work/opencv-2.4.10/modules/core/src/matrix.cpp, line 323
libc++abi.dylib: terminating with uncaught exception of type cv::Exception: /opt/local/var/macports/build/_opt_mports_dports_graphics_opencv/opencv/work/opencv-2.4.10/modules/core/src/matrix.cpp:323: error: (-215) 0 <= roi.x && 0 <= roi.width && roi.x + roi.width <= m.cols && 0 <= roi.y && 0 <= roi.height && roi.y + roi.height <= m.rows in function Mat

Abort trap: 6

it partially works!

for (int i = initial_num; i<= num_img ; i++) {

    vector< Rect> roi;
    Rect left = cvRect(0, 0, imgs[i].cols*0.2, imgs[i].rows);
    Rect right = cvRect(imgs[i].cols*0.5, 0, imgs[i].cols*0.5, imgs[i].rows);
    //cout << imgs[i].cols*0.8<<"cols\n";
    roi.push_back(left);
    roi.push_back(right);

    roisFinal.push_back(roi);
}

this code works. But when I change 0.5 to 0.8 ( to get the last 20% of the image) or any other number, it gives an error:

sorry, it was a different question, I thought it was better to create another question. I'll try this pseudocode and give the feedback. thanks =)

Hey guys,

can you help me create a ROI of the type "vector < vector < rect> > & rois" for the function stitch? Its a vector of vector of the image's ROIs (rectangles) ?

thank you.

ok thanks, but the issue is only to create a ROI of the type "vector<vector <rect=""> >& rois".

how do I specify this ROI? I'm struggling at it.

    Rect left = cvRect(0, 0, imgs[i].cols*0.2, imgs[i].rows);
    vector<Rect> vLeft;
    vLeft.push_back(left);
    roiStitch.push_back(vLeft);
    //right rect
    Rect right = cvRect(imgs[i].cols*0.2, 0, imgs[i].cols*0.2, imgs[i].rows);
    vector<Rect> vRight;
    vRight.push_back(right);
    roiStitch.push_back(vRight);

I'm creating rectangles of the size I want. Cool. But, how does the stitch function knows that the rectangle of that size goes on the right and left sides of the image?

yea, I thought about that, because resolution is very important to my application. Do you think it works by using this function below and use the R.O.I. for the 10% of the image?

C++: Status Stitcher::stitch(InputArray images, const std::vector<std::vector<Rect>>& rois, OutputArray pano)
Parameters: 
images – Input images.
rois – Region of interest rectangles.
pano – Final pano.

This tutorial didn't even stitch my images =( I'll try to change some parameters

Person with a difficult name: I used the simple stitch example and added this loop.
Potato: Thank you, I'll try that!

Hi, I've tried to do this: Loop: stitched + frame2 = stitched.

It keeps stitching the images from the left to right, creating a panorama. But the left side of the image is getting blurred. Any ideas why? I'm just using the Stitch function.

Is there any better algorithm to stitch those sequential images?

Thank you!

Hi, I've tried to do this: Loop: stitched + frame2 = stitched

It keeps stitching the images from the left to right, creating a panorama. But the left side of the image is getting blurred. Any ideas why? I'm just using the Stitch function.

Is there any algorithm to stitch sequential images?

Thank you