template-matching

I am struggling with template matching in the Fourier domain in Matlab. Here are my images (the artist is RamalamaCreatures on DeviantArt): My aim is to place a bounding box around the ear of the possum, like this example (where I performed template matching using normxcorr2): Here is the Matlab code I am using: clear all; close all; template = rgb2gray(imread('possum_ear.jpg')); background = rgb2gray(imread('possum.jpg')); %% calculate padding bx = size(background, 2); by = size(background, 1); tx = size(template, 2); % used for bbox placement ty = size(template, 1); %% fft c = real(ifft2

I'm using the method of match template with CV_TM_CCORR_NORMED to compare two images ... I want to make to make this rotation and scale invariant .. any ideas? I tried to use the same method on the fourier transform of the image and the template , but still the result after rotation is different Template matching with matchTemplate is not good when your object is rotated or scaled in scene. You should try openCV function from Features2D Framework. For example SIFT or SURF descriptors, and FLANN matcher. Also, you will need findHomography method. Here is a good example of finding rotated object

What's the way OpenCV handles transparency in image during template matching? The problem is that the template image needs to have transparent parts, because in the original image there could be anything at those places. I tried all of the methods, and none of them yielded positive results (e.g. position of template in original image wasn't detected correctly). mpenkov It doesn't seem like OpenCV handles alpha the way you want it to. You have two options: Write your own cross-correlation method that will use the alpha channel Transform your images so your alpha channel becomes irrelevant Since

I'm a beginner to OpenCV. I'm trying to do a sample android application to match a template image in a given image using OpenCV Template matching. I searched in the internet and I couldn't find a proper android or java code which satisfy my requirement. But I have C++ code. I dont know how to translate it. http://docs.opencv.org/doc/tutorials/imgproc/histograms/template_matching/template_matching.html Can you please help me to find a proper java or android code. Or else please help me with translate this C++ code into java, which I can use inside android application. Thank you in advance. C++