Sequenced illumination of nearby object with cue marks
Systems and methods for optical imaging are disclosed. An optical sensing system, including a display, an optical sensor, and a processor communicatively coupled to the display and the optical sensor is provided. The processor is configured to execute an input object image capture method. The method determines that an input object is proximate to an optical sensing region of the display, and in response to determining that an input object is proximate to the sensing region of the display, the optical sensing system illuminates the sensing region with an illumination sequence. The illumination sequence includes a cue mark sequence preceding an illumination pattern, where the cue mark sequence contains information about the illumination pattern.
1. An optical sensing system, comprising:
a display;
an optical sensor; and
a processor communicatively coupled to the display and the optical sensor, the processor configured to execute an input object image capture method comprising:
determining that an input object is within a sensing region of the display; and
in response to determining that an input object is within the sensing region of the display, illuminating the sensing region with an illumination sequence, the illumination sequence comprising a cue mark sequence preceding an illumination pattern,
wherein the cue mark sequence includes pattern information of the illumination pattern.
2. The system according to claim 1 , wherein the illuminating is performed by the display.
3. The system according to claim 1 , wherein the input object image capture method further comprises:
acquiring illumination pattern images of the input object during the illuminating the sensing region with the illumination sequence; and
generating object images using the illumination pattern images and the pattern information.
4. The system according to claim 1 , wherein the input object image capture method further comprises:
when the sensing region is illuminated with the cue mark sequence, operating the optical sensor at a reduced pixel depth while acquiring cue mark images of the input object.
5. The system according to claim 1 , wherein the cue mark sequence is illuminated in the sensing region within a reduced region of interest.
6. The system according to claim 1 , wherein the illumination pattern comprises one or more of: a checkerboard pattern, a series of patterns showing different colors, a white pattern followed by a black pattern, and a plurality of alternative black and white stripes.
7. The system according to claim 1 , wherein the pattern information included in the cue mark sequence provides the optical sensor and the processor with information regarding how to process input object images acquired during the illumination pattern prior to capturing the input object images.
8. An input object image capture method performed by a sensing system, the method comprising:
determining that an input object is within a sensing region of a display of the sensing system; and
in response to determining that an input object is within the sensing region of the display, illuminating the sensing region with an illumination sequence, the illumination sequence comprising a cue mark sequence preceding an illumination pattern,
wherein the cue mark sequence includes pattern information of the illumination pattern.
9. The method according to claim 8 , wherein the illuminating is performed by the display.
10. The method according to claim 8 , further comprising:
acquiring illumination pattern images of the input object during the illuminating the sensing region with the illumination sequence; and
generating object images using the illumination pattern images and the pattern information.
11. The method according to claim 8 , further comprising:
when the sensing region is illuminated with the cue mark sequence, operating the optical sensor at a reduced pixel depth while acquiring cue mark images of the input object.
12. The method according to claim 8 , wherein the cue mark sequence is illuminated in the sensing region within a reduced region of interest.
13. The method according to claim 8 , wherein the illumination pattern comprises one or more of: a checkerboard pattern, a series of patterns showing different colors, a white pattern followed by a black pattern, and a plurality of alternative black and white stripes.
14. The method according to claim 8 , wherein the pattern information included in the cue mark sequence provides the sensing system with information regarding how to process input object images acquired during the illumination pattern prior to capturing the input object images.
15. A non-transitory computer readable medium storing instructions for performing an input object image capture method that, when executed by a computer, cause the computer to carry out steps comprising:
determining that an input object is within a sensing region of a display of a sensing system; and
in response to determining that an input object is within the sensing region of the display, illuminating the sensing region with an illumination sequence, the illumination sequence comprising a cue mark sequence preceding an illumination pattern,
wherein the cue mark sequence includes pattern information of the illumination pattern.
16. The non-transitory computer readable medium according to claim 15 , wherein the illuminating is performed by the display.
17. The non-transitory computer readable medium according to claim 15 , wherein the non-transitory computer readable medium stores further instructions that when executed by the computer, cause the computer to carry out steps further comprising:
acquiring illumination pattern images of the input object during the illuminating the sensing region with the illumination sequence; and
generating object images using the illumination pattern images and the pattern information.
18. The non-transitory computer readable medium according to claim 15 , wherein the non-transitory computer readable medium stores further instructions that when executed by the computer, cause the computer to carry out steps further comprising:
when the sensing region is illuminated with the cue mark sequence, operating the optical sensor at a reduced pixel depth while acquiring cue mark images of the input object.
19. The non-transitory computer readable medium according to claim 15 , wherein the cue mark sequence is illuminated in the sensing region within a reduced region of interest.
20. The non-transitory computer readable medium according to claim 15 , wherein the pattern information included in the cue mark sequence provides the sensing system with information regarding how to process input object images acquired during the illumination pattern prior to capturing the input object images.