METHODS AND SYSTEMS FOR VIRTUAL IMAGE COMPENSATION AND EVALUATION

1 . A method for compensating a virtual image displayed by a near eye display based on a micro display projector, comprising:

acquiring a virtual image displayed by the near eye display, wherein the virtual image is formed by a source image emitted from the micro display projector;

preprocessing image data of the virtual image to obtain preprocessed image data;

acquiring a relationship between the source image and the virtual image;

determining an image baseline value of the virtual image; and

obtaining a compensation factor matrix comprising a compensation factor for each pixel in the source image, based on the relationship and the image baseline value.

2 . The method according to claim 1 , wherein acquiring a relationship between the source image and the virtual image further comprises:

calculating a mapping ratio between the source image and the virtual image;

calculating a source image data matrix based on the preprocessed image data and the mapping ratio, wherein the source image data matrix comprises a same pixel dimension of the source image; and

determining the source image data matrix to represent the relationship between the source image and the virtual image.

3 . The method according to claim 1 , wherein the virtual image is acquired by an image light measuring device.

4 . The method according to claim 1 , wherein the source image is a full white image.

5 . The method according to claim 4 , wherein the source image comprises a plurality of partial-on patterns, and the partial-on patterns are stacked to form the full white image.

6 . The method according to claim 1 , wherein preprocessing image data of the virtual image to obtain preprocessed image data further comprises:

determining a region of interest in the virtual image; and

processing image data in the region of interest.

7 . The method according to claim 6 , wherein processing image data in the region of interest further comprises:

excluding noise spots from the region of interest; and

correcting distortion of the virtual image.

8 . The method according to claim 7 , wherein the distortion of the virtual image is corrected by:

x corr =x orig (1 +k 1 r 2 +k 2 r 4 +k 3 r 6 )

y corr =y orig (1 +k 1 r 2 +k 2 r 4 +k 3 r 6 );

wherein (x corr , y corr ) are coordinates of a pixel in the virtual image after distortion correction, corresponding to original coordinates (x orig , y orig ); r presents a distance of the pixel to a center of the virtual image; and k 1 , k 2 , k 3 are coefficients of distortion parameters.

9 . The method according to claim 1 , wherein the micro display projector comprises a micro display panel and a lens, and the micro display panel comprises a micro light emitting array.

10 . The method according to claim 9 , wherein the micro display panel is one of a micro inorganic-LED (light-emitting diode) display panel, a micro-OLED (organic light-emitting diode) display panel, a DLP (Digital Light Processing) display panel, or a micro-LCD (liquid crystal display) display panel.

11 . The method according to claim 1 , wherein the near-eye display is one of an augmented reality display, a virtual reality display, a Head-Up display, or a Head-Mount display.

12 . An apparatus for compensating a virtual image displayed by a near eye display based on a micro display projector, the apparatus comprising:

a memory configured to store instructions; and

one or more processors configured to execute the instructions to cause the apparatus to perform a method for compensating a virtual image, the method comprises:

acquiring a virtual image displayed by the near eye display, wherein the virtual image is formed by a source image emitted from the micro display projector;

preprocessing image data of the virtual image to obtain preprocessed image data;

acquiring a relationship between the source image and the virtual image;

determining an image baseline value of the virtual image; and

obtaining a compensation factor matrix comprising a compensation factor for each pixel in the source image, based on the relationship and the image baseline value.

13 . The apparatus according to claim 12 , wherein acquiring a relationship between the source image and the virtual image further comprises:

calculating a mapping ratio between the source image and the virtual image;

calculating a source image data matrix based on the preprocessed image data and the mapping ratio, wherein the source image data matrix comprises a same pixel dimension of the source image; and

determining the source image data matrix to represent the relationship between the source image and the virtual image.

14 . The apparatus according to claim 12 , wherein the virtual image is acquired by an image light measuring device.

15 . The apparatus according to claim 12 , wherein the source image is a full white image.

16 . The apparatus according to claim 15 , wherein the source image comprises a plurality of partial-on patterns, and the partial-on patterns are stacked to form the full white image.

17 . The apparatus according to claim 12 , wherein preprocessing image data of the virtual image to obtain preprocessed image data further comprises:

determining a region of interest in the virtual image; and

processing image data in the region of interest.

18 . The apparatus according to claim 17 , wherein processing image data in the region of interest further comprises:

excluding noise spots from the region of interest; and

correcting distortion of the virtual image.

19 . The apparatus according to claim 18 , wherein the distortion of the virtual image is corrected by:

x corr =x orig (1 +k 1 r 2 +k 2 r 4 +k 3 r 6 )

y corr =y orig (1 +k 1 r 2 +k 2 r 4 +k 3 r 6 );

wherein (x corr , y corr ) are coordinates of a pixel in the virtual image after distortion correction, corresponding to original coordinates (x orig , y orig ); r presents a distance of the pixel to a center of the virtual image; and k 1 , k 2 , k 3 are coefficients of distortion parameters.

20 . The apparatus according to claim 12 , wherein the near-eye display is one of an augmented reality display, a virtual reality display, a Head-Up display, or a Head-Mount display