Methods and apparatus to capture images
Methods and apparatus to operate a mobile phone are disclosed. An example mobile phone disclosed herein includes an illumination source and an image sensor to capture a first image of a face. The disclosed example mobile phone also includes a logic circuit to determine whether the face in the first image is in a first orientation with respect to the image sensor. When the face in the first image is in the first orientation, the logic circuit is to trigger the image sensor to capture a second image and perform a facial recognition process on the second image, but not on the first image.
1. A mobile phone comprising:
an image sensor to capture a first image of a face; and
a logic circuit to:
determine whether the face in the first image is in a first orientation with respect to the image sensor; and
when the face in the first image is in the first orientation:
trigger the image sensor to capture a second image; and
perform a facial recognition process on the second image, but not on the first image.
2. The mobile phone of claim 1 , further including an illumination source, wherein the second image is captured while the illumination source is used to illuminate the face.
3. The mobile phone of claim 1 , wherein the image sensor is to operate in a first mode to capture the first image at a first resolution, the image sensor is to operate in a second mode to capture the second image at a second resolution, the second resolution higher than the first resolution, and the facial recognition process is performed on image data of the second resolution included in the second image.
4. The mobile phone of claim 1 , wherein the logic circuit is further to:
when the face in the first image is not in the first orientation:
trigger the image sensor to capture the second image;
determine whether the second image includes the face in the first orientation with respect to the image sensor; and
not perform the facial recognition process on the second image when the face in the second image is not in the first orientation.
5. The mobile phone of claim 2 , wherein the illumination source is at least one of a flash or a display.
6. The mobile phone of claim 5 , wherein the first image is captured without the flash emitting light.
7. The mobile phone as defined in claim 1 , further including a binner to bin pixels of the first image.
8. A tangible computer readable medium comprising instructions that, when executed, cause a mobile phone to at least:
capture a first image of a face; and
determine whether the face in the first image is in a first orientation with respect to an image sensor; and
when the face in the first image is in the first orientation:
capture a second image; and
perform a facial recognition process on the second image, but not on the first image.
9. The computer readable medium as defined in claim 8 , wherein the second image is captured while an illumination source is illuminated.
10. The computer readable medium as defined in claim 8 , wherein the mobile phone is to operate in a first mode to capture the first image at a first resolution, the mobile phone is to operate in a second mode to capture the second image at a second resolution, the second resolution higher than the first resolution, and the facial recognition process is performed on image data of the second resolution included in the second image.
11. The computer readable medium as defined in claim 8 , wherein the instruction, when executed, further cause the mobile phone to:
when the face in the first image is not in the first orientation:
trigger the image sensor to capture the second image;
determine whether the second image includes the face in the first orientation with respect to the image sensor; and
not perform the facial recognition process on the second image when the face in the second image is not in the first orientation.
12. The computer readable medium as defined in claim 9 , wherein the illumination source is at least one of a flash or a display.
13. The computer readable medium as defined in claim 12 , wherein the first image is captured without the flash emitting light.
14. The computer readable medium as defined in claim 8 , further including a binner to bin pixels of the first image.
15. A mobile phone comprising:
image capturing means for capturing a first image of a face;
orientation determining means for determining whether the face in the first image is in a first orientation with respect to the image capturing means;
triggering means for triggering the image capturing means to capture a second image when the face in the first image is in the first orientation; and
facial recognition means for performing a facial recognition process on the second image, but not on the first image, when the face in the first image is in the first orientation.
16. The mobile phone of claim 15 , further including illumination means, wherein the second image is captured while the illumination means is used to illuminate the face.
17. The mobile phone of claim 15 , wherein the image capturing means is to operate in a first mode to capture the first image at a first resolution, the image capturing means is to operate in a second mode to capture the second image at a second resolution, the second resolution higher than the first resolution, and the facial recognition process is performed on image data of the second resolution included in the second image.
18. The mobile phone of claim 15 , wherein:
the triggering means is to trigger the image capturing means to capture the second image when the face in the first image is not in the first orientation; and
the orientation determining means is to determine whether the face in the second image is in the first orientation with respect to the image capturing means; and
the facial recognition means is not to perform the facial recognition process on the second image when the face in the second image is not in the first orientation.
19. The mobile phone of claim 16 , wherein the illumination means is at least one of a flash or a display.
20. The mobile phone of claim 19 , wherein the first image is captured without the flash emitting light.