how to provide video (Heigh x Width x frames)

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Ren
Ren 2013-5-19
Hi, i'm working in the spatio temporel interest point, and in order to detect the keypoints , the video have to be matrice (Height x Width x frames) How can i do it? Thank you.

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回答（2 个）

Image Analyst
Image Analyst 2013-5-19
I'm not sure what you're asking. You can provide video by using a video camera to create a video that is stored in a file. Or you can create one manually from a bunch of frames and using the im2frame() function. Or you can "provide" one to your program (i.e. put into a variable in your program) by using VideoReader class, or mmreader(), or avireader().
Youssef Khmou
Youssef Khmou 2013-5-19
hi Ren,
i think you have to explain a little more your situation, are you working on existing Video or image sequences ? or you want to generate such 3d array ?
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Youssef Khmou
Youssef Khmou 2013-5-19
you can use "aviread" function, next you extract the dimensions from that structure , and you create a 3d matrix A(x,y,t).Using a loop on the third dimension, you can affect each frame to A .

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