I try to make an application to recognize real building. Type of my target image is single image and this image got 5-star rating in target manager (see attachment target_image.jpg). Afterwards, I printed out used target image. Recognition of building from this paper was working very well. But when i tried to recognize the building from other images (see attachment image1.jpg and image2.jpg) it was not working. And whats more, when i tried to recognize the real building itself, it was not working too (I stood in a position from the image was taken). Probably there is a problem with light conditions and angle. Any suggestions how to improve the recognition?. Should the target image photo been taken from another position or different angle?. Thx for any response.