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2017-02-15 06:33:26 -0500 commented answer Image Alignment

How can i convert the images into a "feature image" ? Sorry, i dont know what is a feature image..

2017-02-15 05:12:17 -0500 received badge  Enthusiast
2017-02-13 05:59:14 -0500 commented answer Image Alignment

Thanks for the answers!! I will take a look about Multi Scale Optical! If someone wanna see the images,here is a link to download:

2017-02-10 04:41:26 -0500 commented answer Image Alignment

In fact it is a NIR, near-infrared..

2017-02-09 07:46:09 -0500 asked a question Image Alignment

I have two aerial photos, a RGB and a InfraRed, this photos are without lens distortion, and are the same size and with the same field of view (99%). I need to make a 4 band image, so i detect some features using ORB, find a homography and use warpperspective to align the photos, but its not good enough, i found some offsets. The photos are big, the size is 11608 x 8708, so when i use SIFT or SURF, my desktop freeze or i have problems with memory. I tried to use FlannMatcher, use BFMatcher, use a mask with photos and used SIFT/SURF, and still not good enough. I know that with this images i can take a perfectly 4 band images because i used another app and it was great, but i need to know how to do this with Opencv. What i can do ?

2017-02-03 07:54:52 -0500 commented question Distortion Coefficients Units

i already used a mask without sucess... The another company sent to me a 4 band image without any disparity!! 100% ok! the field of view its the same (99,5 %) and i already resized the IR to RGB size or vice-versa.

2017-02-03 04:58:28 -0500 commented question Distortion Coefficients Units

The real problem is this: I have two cameras on a plane, side by side, one RGB with 80Mp and another InfraRed with 60Mp. The photos are taked at the same time. I need to generate a 4 band image, but the IR have don´t fit perfectly with the RGB photo. The two cameras are calibrated. What i´m doing, i remove the lens distortion from the photos, so i use ORB to detect some points, find a homography and use warpperspective to fit the IR on RGB. But i still finded small offsets. In the center of photos it´s 100% fitted. I can´t use SIFT or SURF because the photos are too big and i have problems with memory. I believe that the problem is in the undistortion process. I converted the k coefficients to pixel, dividing by pixelsize without sucess..

Sorry for my english.

2017-02-02 15:50:31 -0500 commented question Distortion Coefficients Units

Sorry ... it's an aerial photo taken by a PhaseOne camera, IXA180. The camera was calibrated by another company that sent me the parameters. They also sent me a photo without the distortion and I'm trying to do the same with OpenCV but I do not have the same result. I'm sure the photo sent by them is correct, but they will not tell me how they did it.

2017-02-02 10:49:55 -0500 commented question Distortion Coefficients Units

Yes, thats it...

2017-02-02 10:42:47 -0500 answered a question Can you limit the number of Keypoints using sift feature detector?

You can limit the Keypoints if you use ORB detector.

2017-02-02 07:29:29 -0500 asked a question Distortion Coefficients Units

I already checked other questions here in the forum about this but I did not find a good answer. I have to remove the lens distortion of a picture, my distortion coefficients are in k1mm-2, k2mm-4, and k3mm-6. But I do not get satisfactory results, I'm sure my data is correct, my question is whether I use my parameters the way they are (mm-2, mm-4, mm-6) or I have to do some transformation before?

Focal, cx and cy are correct are Ok.


2016-07-29 08:59:03 -0500 received badge  Editor (source)
2016-07-29 08:46:30 -0500 asked a question Measuring from 3D photos

i have two photos taken by a car like google street view car, this photos has 80% overlap, i have the photo coordinates in UTM system, omega phi kappa, calibration values like p1,p2,k1,k2, sensor size, focal,etc. Is possible to visualize this photos in a 3d split view and take measures from this photos ? sorry for my english, but how can i do that?! rectifying my question, i want that user see the left and the right photo, adjusted, and click two points on the photo to get measure.

2016-04-12 00:22:16 -0500 asked a question Adjusting an image over another ?

I have 2 cameras , an RGB and IR, side by side. The photos are taken at the same time , but each has its lens distortion and different size frame. I can correct the distortions, but how do I adjust or rectify the IR band on the RGB . I need to merge the bands.

Sorry for my English!!