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JiawangBian / FM-Bench

An Evaluation of Feature Matchers for Fundamental Matrix Estimation (BMVC 2019)
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Confusing about the ComputeNormlizedSGD #3

Open yyangzh opened 4 years ago

yyangzh commented 4 years ago

Hi, sorry for the bothering,

I'm confused about the function ComputeNormlizedSGD( F1, F2, size1, size2). In this function, symmetric computation is applied. However, when you reverse the direction from I1->I2 to I2->I1, should the fundamental F1, F2 be changed to their transposed one F1^T, F2^T? In your function, d2 = one_iteration(F2, F1, h2, w2, h1, w1) and I can't understand why there is no such transformation.

I'm looking forward to your kindly reply :).

JiawangBian commented 4 years ago

Thanks for your attention on this work. So sorry that as I haven't read this code for a long time, it is hard for me to answer your questions quickly. However, I am confident that it is correct, as I paid much time on checking them at that moment. I hope that you try to read it more several days. If you are still confused after that, I will try to back again to this project and reply to you.

yyangzh commented 4 years ago

Thanks for your reply, I will try my best to figure it out.

jingedawang commented 4 years ago

According to this paper, we should "reverse the roles of F1 and F2" instead of reversing the roles of I1 and I2. In this circumstance, this line should be

    d2 = one_iteration(F2, F1, h1, w1, h2, w2);

Please have a look at this problem.

yyangzh commented 4 years ago

According to this paper, we should "reverse the roles of F1 and F2" instead of reversing the roles of I1 and I2. In this circumstance, this line should be

    d2 = one_iteration(F2, F1, h1, w1, h2, w2);

Please have a look at this problem.

Yes. This way makes sense.