Method for determining a correction function for a display signal for the display of an image
Patent Information
- Authority / Receiving Office
- FR · FR
- Patent Type
- Patents
- Current Assignee / Owner
- ROBERT BOSCH GMBH
- Filing Date
- 2023-05-16
- Publication Date
- 2026-07-31
Smart Images
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Abstract
Claims
Demands
1. Method (200) for determining a correction function to correct a signal to display an image on a display (22) for an ob- server (24) comprising the steps of: - to display a white image on the display (22), - measure a brightness distribution of the white image emitted according to the observer's viewing angle (24) on the display (22), the values of luminous density being measured for different viewing angles of the observer (24) on the display (22), - determine a light distribution function using the values of measured brightness, the brightness distribution function of brightness density values giving an image depending on the angle of observer's view (24) on the display (22), - determine a range of observer's viewing angle (24) on the display (22), - associate the light density values with the distribution function brightness to the pixels of the display (22) within the angle range of view, - determine a minimum value for the light density of the function brightness distribution including the viewing angle range, - determine a correction function for correction values of pixels of the display (22) depending on the viewing angles of the observer (24) on the display (22) within the viewing angle range depending on the minimum value of light density and the values of light density associated with the pixels of the display (22) in the range angle of view.
2. Method (200) according to the preceding claim, according to which in the step of measuring the image brightness distribution white light emitted according to the observer's viewing angle (24) on the display (22), the values of light density are measured along a horizontal depending on the horizontal viewing angle of the observer (24) of the display (22).
3. Method (200) according to any one of the preceding claims, according to which in the step of measuring the image brightness distribution white light emitted depending on the observer's viewing angle (24) on the display (22), the luminous density values are measured according to a vertical as a function of the observer's vertical viewing angle (24) on the display (22).
4. Method (200) according to any one of the preceding claims, according to which in the step of associating the light density values of the brightness distribution function to the pixels of the display (22) in the viewing angle range, we calculate discrete viewing angles for the pixels of the display (22) and we associate the light density values of the light distribution function by the discreet viewing angles to the pixels of the display (22) within the viewing angle range.
5. Method (200) according to any one of the preceding claims, according to which in the step of associating the light density values of the brightness distribution function to the pixels of the display (22) in the viewing angle range, we associate the light density values with pixels of a column.
6. Method (200) according to any one of the preceding claims, according to which using the correction function, the levels are lowered differently of grey of the display pixels (22) in the viewing angle range for balance the light density values of the pixels within the range angle of view.
7. Method (200) according to any one of the preceding claims, according to which we determine the range of the observer's viewing angle (24) on the display (22) as a function of the distance from the observer (24) by relative to the display (22) and / or the position of the observer (24).
8. Method (200) according to any one of the preceding claims, according to which The correction function is determined according to the observer's distance. (24) relative to the display (22) and / or the position of the observer (24) Or We determine several correction functions according to the different distances. differences of the observer (24) with respect to the display (22) and / or to different positions of the observer (24).
9. Method (220, 230) for determining a corrected signal to display a image on the display (22) for an observer (24) including the The next steps consist of: - provide an image data input signal for displaying an image on the display (22) for the observer (24), - to provide a correction function according to any one of claims 1 to 8, - determine the corrected signal for displaying an image on a display (22) depending on the input signal and the function of correction.
10. Method (220, 230) according to claim 9, according to which in the step of determining the corrected signal, the function is applied correction on one or more color channels to a grayscale level pixels of the input signal.
11. Method (220, 230) according to any one of the preceding claims, according to which the process includes a step of determining the distance from the observer (24) in relation to the display (22), The range of the observer's viewing angle (24) is adapted to the display. {22) and / or the correction function according to the observer's distance (24) relative to the display (22).
12. A method according to any one of the preceding claims, according to which the process includes a step of determining the position of the observer (24), we determine the observer's viewing angle (24) on the display (22) and / or the correction function according to the observer's position (24).
13. Display (22) for presenting an image with the signal corrected according to one of the demands 9 to 12.
14. Display (22) according to claim 13, according to which The display (22) is designed to display different images in minus two different viewpoints, the images displayed in a first viewing angle being represented with the corrected signal.
15. System comprising a display (22) according to any one of the claims 13-14 and an observation device (26) for determining the distance from the observer (24) relative to the display (22) and / or a position of the observer (24).