Touch implementation method and device and electronic device

A touch implementation device, comprising:

• a display screen configured to display N calibration points for user touch, wherein after one calibration point is displayed on the display screen and touched by the user, a next calibration point is displayed;
• a first acquisition unit configured to acquire first coordinates of the N calibration points for user touch, wherein a first coordinate of a point refers to a pixel coordinate of the point at the display screen;
• the pixel coordinate is defined by a pixel distance to a default pixel at the display screen;
• first coordinates of at least three of the N calibration points allow the three of the N calibration points to be not in a same straight line upon the three of the N calibration points being displayed by the display screen;
• and N≥3 and N is an integer;
• a second acquisition unit configured to acquire second coordinates of the N calibration points, wherein a second coordinate of the point refers to a three-dimensional coordinate detected by a depth device upon the point being touched by a user;
• and
• a first calculating element configured to calculate a mapping parameter between the first coordinate of the point and the second coordinate of the point according to the first coordinates of the N calibration points and the second coordinates of the N calibration points, wherein the mapping parameter is configure for acquiring a first coordinate of a touch point touched by the user upon the user touching the display screen.

A touch implementation device, comprising:

• a memory and a processor, wherein the memory is configured to store a code which is configured for controlling the processor to execute a following action:
• displaying N calibration points for user touch by a display screen;
• acquiring first coordinates of the N calibration points, wherein a first coordinate of a point refers to a pixel coordinate, at the display screen, of the point;
• and first coordinates of at least three of the calibration points allow the three of the calibration points to be not in a same straight line upon the three of the calibration points being displayed by the display screen;
• acquiring second coordinates of the N calibration points, wherein a second coordinate of the point refers to a three-dimensional coordinate detected by a depth device upon the point being touched by a user;
• and
• calculating a mapping parameter between the first coordinate of the point and the second coordinate of the point according to the first coordinates of the N calibration points and the second coordinates of the N calibration points, wherein the mapping parameter is configured for acquiring a first coordinate of a touch point touched by the user upon the user touching the display screen,
• wherein
• mapping parameters K0, K1, K2, K3, K4 and K5 between the first coordinate of the point and the second coordinate of the point are calculated according to
• {
• M
• 0
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• ,
• wherein (M0, N0) is a first coordinate of a first calibration point;
• (M1, N1) is a first coordinate of a second calibration point;
• (M2, N2) is a first coordinate of a third calibration point;
• (X0, Y0, Z0) is a second coordinate of the first calibration point;
• (X1, Y1, Z1) is a second coordinate of the second calibration point;
• (X2, Y2, Z2) is a second coordinate of the third calibration point;
• and the first calibration point, the second calibration point and the third calibration point displayed by the display screen are not in the same straight line.