Databases
StackOverflow2013
Postsdbo
PODerive a rotational/transformational matrix given an image and a rotated image in Java?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PODerive a rotational/transformational matrix given an image and a rotated image in Java?
    primarykey
    data
    text
    <p>Need some advise and point me in the right direction.</p> <p>My object detection system reads in this image(see below) and returns coordinates for bounding boxes for some detection results(in this case, a hammer)</p> <p><a href="http://i1116.photobucket.com/albums/k572/Ruihong_Zhou/z3IJx-1.png" rel="nofollow">http://i1116.photobucket.com/albums/k572/Ruihong_Zhou/z3IJx-1.png</a></p> <p>However I wish to examine the accuracy of the detection results for the same image by feeding the system, rotated images of the original images and allow it to detect and return coordinates for detection results if any.</p> <p>For example:</p> <p><a href="http://i1116.photobucket.com/albums/k572/Ruihong_Zhou/myJQA-1.jpg" rel="nofollow">http://i1116.photobucket.com/albums/k572/Ruihong_Zhou/myJQA-1.jpg</a></p> <p>Let's say the coordinates of the yellow point(in the image above) is found but it is with respect to the rotated frame of reference. How do i actually transform/rotate these coordinates and find out where do they actually lie in the original image with respect to the original frame of reference.</p> <p>Someone has pointed out to me that I should use affine transformation but I'm not sure how to go about it as honestly this is the 1st time i have heard of affine transformation and i'm still trying to brute force my learning of it now.</p> <p>Further research indicates that I need both the original set of coordinates in the original image and the same set of coordinates in the rotated image to come up with a transformation matrice but I only have the detected set of coordinates in the rotated image.</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USuser1968818
    1. USuser1968818
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PODerive a rotational/transformational matrix given an image and a rotated image in Java?
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload