Image Gradient

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"Where is the edge? Hope you know the answer abit".
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4-years-later-Me: "Not yet"

ReboD
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Thank you so much, nothings i had seen like this kind of explanation very informative with practical explanation . thank you again :-)

divyar
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Thank you! Concise and clear explanation!

sergeimerekin
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I don't understand why can't you just do it 3*3 matrix?

ahmadbelhaj
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The image function is the function of intensities, right? How do we write it in the form a 'function'?

satashreeroy
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Hello, thank you for your very informative and helpful video. Could you please tell the answer for the last question (where is the edge)? I don't have a base on image processing so it's really hard to find the answer. Thanks again.

anp
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Hello, if I have an image with 11x11 pixels and In the center of the image is a square of 5x5 pixels. The gray level of the background is 0 and the gray level of the square is 50. How can I compute the result of the magnitude of edges given by the compass operator for this image taking into account that the image is not noisy? I have the code but I don't know how to apply the math on paper...

MrRobi
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In economy we use the two-dimensional gradient, but call it a Jacobean!!!
A Hessian is then a multi-dimensional second derivative…

One use case is in credit scoring your customer for a credit card application approval…!

My two 💳 swipes

Oh and when scanning a 3d surface to find local and global minimum and maximum…
Eg is it the local hill by the church, or is it perhaps Mount Everest we found, perhaps the Mariana Trench… 😂

Hans_Magnusson