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I have one image that may or may not be part of another image (possibly resized).

How can I tell if that's the case, and pointing out the region of the first image that contains the second? For example, I'd like to tell that the second image is an enlarged portion of the first.

enter image description here enter image description here

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closed as too broad by MBaz, Laurent Duval, Matt L., A_A, Marcus Müller Nov 6 '16 at 23:58

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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This problem can be treated as signal/image detection or image registration. From the image registration perspective, there is a good tutorial that is exactly what you need: Registering an Image Using Normalized Cross-Correlation

enter image description here enter image description here enter image description here

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