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but not able to get the accuracy even in same resolution image

So what is the accuracy you are expecting?

I put red circle on area that was not found by HOG utility

HOG is not a holy grail, it is a rigid model and thus prone to false negative detections (meaning you are not detecting an actual object).

Like @berak said, people will refrain from clicking links... put some effort in your questions please.

but not able to get the accuracy even in same resolution image

So what is the accuracy you are expecting?expecting? You cannot evaluate a detector on a frame by frame basis, you rather do that over a global dataset.

I put red circle on area that was not found by HOG utility

HOG is not a holy grail, it is a rigid model and thus prone to false negative detections (meaning you are not detecting an actual object).

Like @berak said, people will refrain from clicking links... put some effort in your questions please.