Image interaction system, method for detecting finger position, stereo display system and control method of stereo display

A control method of a stereo display comprising:

• displaying a left eye image and a right eye image, such that a left eye and a right eye of a viewer generate a parallax to view a stereo image;
• capturing a depth data of a three-dimensional space;
• analyzing an eyes position of the viewer according to the depth data;
• and
• adjusting the left eye image and the right eye image based on variations of the eyes position when the viewer moves horizontally, vertically, or obliquely in the three-dimensional space relative to the stereo display.

A stereo display system comprising:

• a stereo display configured to display a left eye image and a right eye image, such that a left eye and a right eye of a viewer generate a parallax to view a stereo image;
• a depth detector configured to capture a depth data of a three-dimensional space;
• and
• a computing processor coupled to the stereo display and the depth detector and configured to control image display of the stereo display, wherein the computing processor analyzes an eyes position of the viewer according to the depth data and computes an appearance position of the stereo image appeared in the three-dimensional space according to the eyes position and a display position of the left eye image and the right eye image displayed in the stereo display,
• wherein the computing processor performs the following steps:
• defining coordinates of a first vector, a second vector and a third vector in the three-dimensional space;
• computing a coordinate of the appearance position on the first vector according to a formula of
• P
• z
• =
• E
• z
• ×
• D
• obj
• ×
• W
• dp
• D
• obj
• ×
• W
• dp
• +
• W
• eye
• ×
• R
• X
• ;
• and
• computing the coordinate of the appearance position on the second vector and the third vector according to a formula of
• P
• x
• ,
• y
• =
• E
• x
• ,
• y
• +
• (
• O
• x
• ,
• y
• -
• E
• x
• ,
• y
• )
• ×
• (
• E
• z
• -
• P
• z
• )
• E
• z
• ,
• wherein Pz is the coordinate of the appearance position on the first vector, Px,y is the coordinate of the appearance position on the second vector and the third vector, Ez is a coordinate of the left eye position or the right eye position on the first vector, Ex,y is a coordinate of the left eye position or the right eye position on the second vector and the third vector, Wdp is a width of a display region of the stereo display, Ox,y is a coordinate value of the left eye image or the right eye image on the second vector and the third vector, Weye is a distance between the left eye and the right eye, Dobj is a disparity between the left eye image and the right eye image, and Rx is a resolution of the stereo display on the second vector,
• wherein Ox,y is corresponding to the left eye image when Ex,y and Ez are corresponding to the left eye position, and Ox,y is corresponding to the right eye image when Ex,y and Ez are corresponding to the right eye position,
• wherein the computing processor adjusts the left eye image and the right eye image based on variations of the eyes position when the viewer moves in the three-dimensional space.

A method for detecting a finger position, adapted to detect the finger position of a user, the method comprising:

• capturing an image data;
• obtaining a position of a hand region according to an image intensity information of the image data;
• dividing the hand region into a plurality of identification regions by at least one mask;
• and
• determining whether the identification regions satisfy with an identification condition to detect the finger position of the user.

An image interaction system, comprising:

• a display configured to display an interactive image;
• a video camera configured to capture an image of a user to generate an image data;
• and
• a computing processor coupled to the display and the video camera and configured to control frame display of the display,
• wherein the computing processor obtains a position of a hand region according to an image intensity information of the image data captured by the video camera, divides the hand region into a plurality of identification regions by at least one mask, and determines whether the identification regions satisfy with an identification condition to detect the finger position of the user.