Tracking

"vision/correlation" defines functions to find correlation between window-image and tracking-image.

tracking-window [class]

  :super   pixel-image 

  :slots 		 x-pos y-pos x-vel y-vel


pattern-size window-size


x-win y-win window window-margin


update threshold half-pattern correlation 

This class defines tracking window.

:correlation [method]

returns correlation between window-image and this image.

:grab &optional (x x-pos) (y y-pos) (sampling 2) [method]

grabs video image and returns grabbed pixel-image.

:window-rectangle val [method]

draws rectangle on xwindow.

:rectangle val [method]

draws rectangle on xwindow.

:move newpos &aux (newx (aref newpos 0)) (newy (aref newpos 1)) [method]

moves tracking-window to newpos and grabs video image.

:track display-window &optional th [method]

tracks this image from window image.

:search display-window &optional th [method]

searches this image from window image.

:track-and-search flag &optional th [method]

tracks this image. If mistake tracking, searches this image from window image.

:pos [method]

returns up-left position of window.

:vel [method]

returns tracking velocity.

:insidep pos &aux (x (aref pos 0)) (y (aref pos 1)) [method]

checks pos that is contained with tracking window.

:update &optional (flag :get) [method]

sets flag as update. if flag doesn't exist, returns update.

:prin1 strm &rest mesg [method]

prints this tracking-window object with its name and dimensions.

:init x y size win-size [method]

creates tracking-window object and sets slots.