An apparatus and method for measuring 3-dimensional (3D) interocular crosstalk is disclosed. A light sensor detects luminance of a stereoscopic image displayed in a display and outputs a luminance value indicating the detected luminance. A controller calculates 3D interocular crosstalk based on a gray difference and a residual luminance ratio.
Legal claims defining the scope of protection, as filed with the USPTO.
1. An apparatus for measuring 3-dimensional (3D) interocular crosstalk, comprising: a light sensor configured to detect luminance of a stereoscopic image displayed in a display and output a luminance value indicating the detected luminance; and a controller configured to calculate 3D interocular crosstalk based on a gray difference and a residual luminance ratio, wherein the gray difference is calculated based on gray levels of a first view image and a second view image included in the stereoscopic image and the residual luminance ratio is calculated based on the luminance value.
2. The apparatus according to claim 1 , wherein the stereoscopic image is displayed in a glasses method or a non-glasses method.
3. The apparatus according to claim 1 , wherein the light sensor detects luminance of the stereoscopic image passing 3D glasses.
4. The apparatus according to claim 1 , wherein the gray difference is multiplied by the residual luminance ratio to calculate the 3D interocular crosstalk.
5. The apparatus according to claim 1 , wherein the gray difference is calculated further based on the display's Gamma (γ) value.
6. The apparatus according to claim 1 , wherein the gray difference is calculated by the following equation (1), D G 1 , G 2 = ( G 2 255 ) γ - ( G 1 255 ) γ The following equation (1) wherein, in the equation (1), G 1 is the first view image's gray level, G 2 is the second view image's gray level, D G1,G2 means the gray difference, and Γ is the display's Gamma(γ) value.
7. The apparatus according to claim 1 , wherein the residual luminance ratio is calculated by the following equation (2), R G 1 , G 2 = L G 1 , G 2 - L G 2 , G 2 L G 2 , G 1 - L G 2 , G 2 The following equation (2) wherein, in the equation (2), G 1 is the first view image's gray level, G 2 is the second view image's gray level, L G1,G2 is a luminance value indicating the luminance detected by the light sensor when the first view image is for an observed image and the second view image is for an unobserved image, L G2 , G1 is a luminance value indicating the luminance detected by the light sensor when the first view image is for an unobserved image and the second view image is for an observed image, L G2,G2 is a luminance value indicating the luminance detected by the light sensor when the stereoscopic image includes two second view images and one of the two second view images is for an observed image and another is for an unobserved image, and R G1,G2 means the residual luminance ratio.
8. The apparatus according to the claim 1 , wherein the controller calculates the 3D interocular crosstalk using the following equation (3) or the following equation (4), X LO , G 1 , G 2 = ( ( G 2 255 ) γ - ( G 1 255 ) γ ) × L LO , G 1 , G 2 - L LO , G 2 , G 2 L LO , G 2 , G 1 - L LO , G 2 , G 2 × 100 % Equation ( 3 ) X RO , G 1 , G 2 = ( ( G 2 255 ) γ - ( G 1 255 ) γ ) × L RO , G 1 , G 2 - L RO , G 2 , G 2 L RO , G 2 , G 1 - L RO , G 2 , G 2 × 100 % Equation ( 4 ) wherein, in the equation (3) and the equation (4), G 1 is the first view image's gray level, G 2 is the second view image's gray level, Γ is the display's Gamma(γ) value, L LO,G1,G2 is a luminance value indicating the luminance detected by the light sensor when the first view image is for an observed image on a left lens of 3D glasses and the second view image is for an unobserved image on the left lens, L LO,G2,G1 is a luminance value indicating the luminance detected by the light sensor when the first view image is for an unobserved image on left lens and the second view image is for an observed image on the left lens, L LO,G2,G2 is a luminance value indicating the luminance detected by the light sensor when the stereoscopic image includes two second view images and one of the two second view images is for an observed image on the left lens and another is for an unobserved image on the left lens, L RO,G1,G2 is a luminance value indicating the luminance detected by the light sensor when the first view image is for an observed image on a right lens of the 3D glasses and the second view image is for an unobserved image on the right lens, L RO,G2,G1 is a luminance value indicating the luminance detected by the light sensor when the first view image is for an unobserved image on right lens and the second view image is for an observed image on the right lens, L RO,G2,G2 is a luminance value indicating the luminance detected by the light sensor when the stereoscopic image includes two second view images and one of the two second view images is for an observed image on the right lens and another is for an unobserved image on the right lens, and X LO,G1,G2 and X RO,G1,G2 means the influence of G 2 to G 1 , which are measured on the left lens and right lens, respectively.
9. The apparatus according to the claim 1 , wherein the gray level includes at least one of a red gray level, a green gray level or a blue gray level.
10. The apparatus according to the claim 1 , wherein an image pattern of the first view image includes 4% sized window box pattern and four box patterns of 1% sized window.
11. The apparatus according to the claim 10 , wherein the 4% sized window box pattern are located at the center of the first view image and each of the four box patterns of 1% sized window is located at the corners of the first view image.
12. The apparatus according to the claim 10 , wherein the sum of gray level of the 4% sized window box pattern and the four box patterns of 1% sized window is a maximum gray level.
13. The apparatus according to the claim 1 , wherein an image pattern of the stereoscopic image is determined according to a display mode.
14. The apparatus according to the claim 13 , wherein the display mode includes at least one of a gray mode, a red color mode, a green color mode or a blue color mode.
15. The apparatus according to the claim 1 , wherein the controller generates 3D interocular crosstalk measurement report including at least one of measured 3D interocular crosstalk values of each of gray pairs (G 1 , G 2 ), an average value of additive and subtractive interocular crosstalk or a peak value of additive and subtractive interocular crosstalk, wherein G 1 is the first view image's gray level and G 2 is the second view image's gray level.
16. A method of measuring a three-dimensional (3D) interocular crosstalk, comprising: displaying a full white pattern image; displaying a first stereoscopic image including a first view image for an observed image and a second view image for an unobserved image; displaying the full white pattern image; displaying a second stereoscopic image including the first view image for an unobserved image and the second view image for an observed image; displaying a full white pattern image; displaying a third stereoscopic image including two second view image; detecting a first luminance of the displayed first stereoscopic image; detecting a second luminance of the displayed second stereoscopic image; detecting a third luminance of the displayed third stereoscopic image; and calculating 3D interocular crosstalk based on the detected first luminance, the detected second luminance and the detected third luminance.
17. The method according to the claim 16 , wherein the 3D interocular crosstalk is calculated further based on gray levels of the first view image and the second view image.
18. The method according to the claim 16 , wherein the 3D interocular crosstalk is calculated further based on a display's Gamma (γ) value.
19. The method according to the claim 16 , wherein the 3D interocular crosstalk is calculated by the following equation (5) or the following equation (6), X LO , G 1 , G 2 = ( ( G 2 255 ) γ - ( G 1 255 ) γ ) × L LO , G 1 , G 2 - L LO , G 2 , G 2 L LO , G 2 , G 1 - L LO , G 2 , G 2 × 100 % Equation ( 5 ) X RO , G 1 , G 2 = ( ( G 2 255 ) γ - ( G 1 255 ) γ ) × L RO , G 1 , G 2 - L RO , G 2 , G 2 L RO , G 2 , G 1 - L RO , G 2 , G 2 × 100 % Equation ( 6 ) wherein, in the equation (5) and the equation (6), G 1 is the first view image's gray level, G 2 is the second view image's gray level, Γ is the display's Gamma(γ) value, L LO,G1,G2 is a luminance value indicating the luminance of the first stereoscopic image detected on a left lens of 3 D glasses, L LO,G2,G1 is a luminance value indicating the luminance of the second stereoscopic image detected on the left lens, L LO,G2,G2 is a luminance value indicating the luminance of the third stereoscopic image detected on the left lens, L RO,G1,G2 is a luminance value indicating the luminance of the first stereoscopic image detected on a right lens of the 3D glasses, L RO,G2,G1 is a luminance value indicating the luminance of the second stereoscopic image detected on the right lens, L RO,G2,G2 is a luminance value indicating the luminance of the third stereoscopic image detected on the right lens, and X LO,G1,G2 and X RO,G1,G2 means the influence of G 2 to G 1 , which are measured on the left lens and right lens, respectively.
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November 9, 2012
February 23, 2016
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