zelianwen / image-registration Goto Github PK

Hi ,
I am new to SAR technology. I am working on coregistration(Terrasarx images) using SIFT/AKAZE feature extraction techniques. I extracted matched key points from master and slave images and also calculated homography/RANSAC.
How to calculate phase values? I also want to do measure the error (pixel level) and compared to Geofloki results?
can anyone help me in this regard?

如下的一个LMS函数代码中,如果当match1_xy.rows等于match2_xy.rows 等于0 的时候，会在solve(A, B, values, DECOMP_QR);函数求解逆矩阵的时候报错，需在下面增加一个排除条件
if (match1_xy.rows ==0 || match2_xy.rows==0)
CV_Error(Error::StsBadArg, "LMS模块输入特征点为0！");

也可以在LMS(consensus_arr1, consensus_arr2, model, rmse);进来前判定arr1和arr2的rows是否为空，如果为空则给出提示信息并直接return。

static Mat LMS(const Mat&match1_xy, const Mat &match2_xy, string model, float &rmse)
{
if (match1_xy.rows != match2_xy.rows)
CV_Error(Error::StsBadArg, "LMS模块输入特征点对个数不一致！");

.
.
.

}

您好，
我最近也在做图像配准的工作，非常感谢您分享自己的工作。但是我在跑您的代码的时候，发现sift-opencv249和sift_static.exe的结果并不一致，所以想问您，sift_static.exe又增加了什么优化工作，或者您是否愿意上传对应的新的sift-opencv249代码，非常感谢！
小池

I note if I change all CV_32FC1 in your code into CV_16SC1, then the programe can save a lot memory consumption. But the sift_1.detect will fail to get that keypoints_1 in following. How to change the other code for the change?

Thanks for sharing the repository!

When I read the code,I found that there is only the main angle used in the function “calc_sift_descriptor.m”.
Do you have any plan in the future how to use the second highest orientation?
Although only about 15% of points are assigned multiple orientations, but these contribute significantly to the stability of matching.

Thanks again!

感谢作者大大提供的代码，让我这个初学菜鸡能够看到运行结果，去知网拜读了一下您的论文，写的非常好！！再次感谢

The code written is very good.It is very helpful for the beginners.Thank you so much for your sharing.