Methods and apparatuses for using image acquisition data to detect and correct image defects
View Patent ↗A method and device for detecting a potential defect in an image comprises acquiring a digital image at a time; storing image acquisition data, wherein the image acquisition data includes at least one of a position of a source of light relative to a lens, a distance from the source of light to the lens, a focal length of the lens, a distance from a point on a digital image acquisition device to a subject, an amount of ambient light, or flash intensity; determining dynamic anthropometric data, wherein the dynamic anthropometric data includes one or more dynamically changing human body measurements, of one or more humans represented in the image, captured at the time; and determining a course of corrective action based, at least in part, on the image acquisition data and the dynamic anthropometric data.
1. One or more non-transitory processor-readable media having embedded code therein for programming a processor to perform a method of detecting a potential defect in an image, the method comprising:
storing a first value indicative of a position of a source of light relative to a lens;
wherein the first value indicates whether the source of light is:
to the right of the lens,
to the left of the lens,
to the bottom of the lens,
to the top of the lens,
to the top right of the lens,
to the top left of the lens,
to the bottom left of the lens, or
to the bottom right of the lens;
determining a second value indicative of a distance between an image capture apparatus and a subject;
determining a third value indicative of a lens focal length;
determining an in-image pupil size based, at least in part, on the first value, the second value, and the third value;
using the first value to identify an expected orientation for a half-red eye defect; and
identifying defect candidates in the image at least in part based on the expected orientation and the in-image pupil size.
2. One or more non-transitory processor-readable media as in claim 1 further comprising logic for determining whether the first value is greater than a threshold value, wherein the course of action comprises not altering the digital image if the first value is greater than the threshold value.
3. One or more non-transitory processor-readable media claim 1 further comprising logic for determining whether the first value is less than a threshold value, wherein the course of action comprises analyzing the image to identify flash-eye defect candidates if the first value is less than the threshold value.
4. One or more non-transitory processor-readable media claim 1 , further comprising logic for:
determining an on-subject pupil size based, at least in part, on the first value;
determining whether to perform a corrective action based, at least in part, on the on-subject pupil size.
5. One or more non-transitory processor-readable media claim 1 , further comprising logic for:
determining an on-subject pupil size based, at least in part, on the first value;
determining a critical distance based, at least in part, on the on-subject pupil size and the second value;
determining whether to perform corrective action on the image based, at least in part, on the critical distance.
6. One or more non-transitory processor-readable media claim 1 , wherein the step of identifying defects includes searching the image only for defects that are the same size as, or smaller, than the in-image pupil size.
7. A portable digital image acquisition device comprising:
a lens;
a digital imaging capturing apparatus;
a source of light for providing illumination during image capture;
logic for performing the following operations:
storing a first value indicative of a position of a source of light relative to a lens;
wherein the first value indicates whether the source of light is:
to the right of the lens,
to the left of the lens,
to the bottom of the lens,
to the top of the lens,
to the top right of the lens,
to the top left of the lens,
to the bottom left of the lens, or
to the bottom right of the lens;
determining a second value indicative of a distance between an image capture apparatus and a subject;
determining a third value indicative of a lens focal length;
determining an in-image pupil size based, at least in part, on the first value, the second value, and the third value;
using the first value to identify an expected orientation for a half-red eye defect;
identifying defect candidates in the image at least in part based on the expected orientation and the in-image pupil size.
8. The portable digital image acquisition device of claim 7 further comprising logic for determining whether the first value is greater than a threshold value, wherein the course of action comprises not altering the digital image if the first value is greater than the threshold value.
9. The portable digital image acquisition device of claim 7 further comprising logic for determining whether the first value is less than a threshold value, wherein the course of action comprises analyzing the image to identify flash-eye defect candidates if the first value is less than the threshold value.
10. The portable digital image acquisition device of claim 7 further comprising logic for:
determining an on-subject pupil size based, at least in part, on the first value;
determining whether to perform a corrective action based, at least in part, on the on-subject pupil size.
11. The portable digital image acquisition device of claim 7 further comprising logic for:
determining an on-subject pupil size based, at least in part, on the first value;
determining a critical distance based, at least in part, on the on-subject pupil size and the second value; and
determining whether to perform corrective action on the image based, at least in part, on the critical distance.
12. The portable digital image acquisition device of claim 7 , wherein the step of identifying defects includes searching the image only for defects that are the same size as, or smaller, than the in-image pupil size.