python Programming Glossary: invariantWhich classes cannot be subclassed? http://stackoverflow.com/questions/10061752/which-classes-cannot-be-subclassed Invariant Classes that follow Singleton pattern have an invariant that there's a limited pre determined number of instances. Any.. pre determined number of instances. Any violation of this invariant in a subclass will be inconsistent with the class' intent and..
Why are slice and range upper-bound exclusive? http://stackoverflow.com/questions/11364533/why-are-slice-and-range-upper-bound-exclusive Everything except the first two characters Here 䏭 a useful invariant of slice operations s i s i equals s . For non negative indices..
Python: How can I format a decimal to always show 2 decimal places http://stackoverflow.com/questions/1995615/python-how-can-i-format-a-decimal-to-always-show-2-decimal-places Once I have valid two place inputs how do I maintain that invariant throughout an application If you need the answer to that along..
Why I can't extend bool in Python? http://stackoverflow.com/questions/2172189/why-i-cant-extend-bool-in-python of an instance of a subclass of bool would break the invariant that True and False are the only instances of bool An instance..
Facing problem with XLWT and XLRD - Reading and writing simultaneously http://stackoverflow.com/questions/4198365/facing-problem-with-xlwt-and-xlrd-reading-and-writing-simultaneously result value for a Formula cell instead of plugging in an invariant zero length string as you noticed. 4 Tell us your higher level..
http://stackoverflow.com/questions/454498/find-an-image-within-an-image
OpenCV Python and SIFT features http://stackoverflow.com/questions/6722736/opencv-python-and-sift-features vision researchers try to avoid SIFT and use other scale invariant models because SIFT is proprietary. share improve this answer..
Detecting if an object from one image is in another image with OpenCV http://stackoverflow.com/questions/7881133/detecting-if-an-object-from-one-image-is-in-another-image-with-opencv papers. Start with Distinctive image features from scale invariant keypoints by David Lowe and then read the papers on SURF. Also..
Finding shapes in an image using opencv http://stackoverflow.com/questions/8785664/finding-shapes-in-an-image-using-opencv can vary in size and ratio you should look at scaling invariant descriptors. A bunch of such descriptors would be perfect for..
http://stackoverflow.com/questions/9860667/writing-robust-color-and-size-invariant-circle-detection-with-opencv-based-on robust color and size invariant circle detection with opencv based on Hough transform or other.. this algorithm more robust It should be size and color invariant so that different circles with different colors and in different..
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