Red-eye filter method and apparatus
View Patent ↗A digital camera has an integral flash and stores and displays a digital image. Under certain conditions, a flash photograph taken with the camera may result in a red-eye phenomenon due to a reflection within an eye of a subject of the photograph. The digital camera has a red-eye filter which analyzes the stored image for the red-eye phenomenon and modifies the stored image to eliminate the red-eye phenomenon by changing the red area to black. The modification of the image is enabled when a photograph is taken under conditions indicative of the red-eye phenomenon. The modification is subject to anti-falsing analysis which further examines the area around the red-eye area for indicia of the eye of the subject.
1. A portable digital camera having no photographic film comprising:
an integral flash for providing illumination during recording of an image without photographic film;
a digital image capturing apparatus for recording said image; and
a red-eye filter for modifying an area within said image indicative of a red-eye phenomenon and thereby generating a modified image that is stored on the camera as a modified image.
2. The camera according to claim 1 , further comprising an integral image display for displaying the modified image.
3. The camera according to claim 1 , wherein the area has a color and shape indicative of the red-eye phenomenon and the image is modified to change the color to a black color and further wherein:
said integral flash selectively provides illumination during image recording; and
said red-eye filter is enabled to modify the image in response to said integral flash providing illumination during image recording.
4. The camera according to claim 3 further comprising an exposure control means for determining if the image was recorded in a condition conducive to the red-eye phenomenon and for generating a red-eye signal in response thereto, wherein said red-eye filter is further enabled in response to the red-eye signal.
5. The camera according to claim 1 , wherein said red-eye filter further includes a falsing avoidance apparatus which enables modification of the area in response to an absence of color indicative of the red-eye phenomenon with in a vicinity of and exclusive to the area.
6. The camera according to claim 1 , wherein said red-eye filter further includes a falsing avoidance apparatus which enables modification of the area in response a substantially white colored region within a vicinity of the area.
7. The camera according to claim 1 , wherein said red-eye filter comprises:
a pixel locator for locating pixels having a color indicative of the red-eye phenomenon;
a shape analyzer for determining if a grouping of at least a portion of the pixels located by said pixel locator comprise a shape indicative of the red-eye phenomenon; and
a pixel modifier for modifying the color of the pixels within the grouping.
8. The camera according to claim 7 , further comprising a falsing analyzer for further processing the image in a vicinity of the grouping for details indicative of an eye, and for enabling said pixel modifier in response thereto.
9. The camera according to claim 7 , further comprising an exposure analyzer for determining if the image was recorded in a condition indicative of the red-eye phenomenon.
10. A portable digital camera having no photographic film comprising:
an integral flash for providing illumination during recording of an image without photographic film;
a digital image capturing apparatus for recording said image;
a red-eye filter for modifying an area within said image indicative of a red-eye phenomenon and thereby generating a modified image; and
an integral image display for displaying the modified image.
11. The camera according to claim 10 , wherein the area has a color and shape indicative of the red-eye phenomenon and the image is modified to change the color to a black color and further wherein:
said integral flash selectively provides illumination during image recording; and
said red-eye filter is enabled to modify the image in response to said integral flash providing illumination during image recording.
12. The camera according to claim 11 , further comprising an exposure control means for determining if the image was recorded in a condition conducive to the red-eye phenomenon and for generating a red-eye signal in response thereto, wherein said red-eye filter is further enabled in response to the red-eye signal.
13. The camera according to claim 10 , wherein said red-eye filter further includes a falsing avoidance apparatus which enables modification of the area in response to an absence of color indicative of the red-eye phenomenon with in a vicinity of and exclusive to the area.
14. The camera according to claim 10 , wherein said red-eye filter further includes a falsing avoidance apparatus which enables modification of the area in response a substantially white colored region within a vicinity of the area.
15. The camera according to claim 10 , wherein said red-eye filter comprises:
a pixel locator for locating pixels having a color indicative of the red-eye phenomenon;
a shape analyzer for determining if a grouping of at least a portion of the pixels located by said pixel locator comprise a shape indicative of the red-eye phenomenon; and
a pixel modifier for modifying the color of the pixels within the grouping.
16. The camera according to claim 15 , further comprising a falsing analyzer for further processing the image in a vicinity of the grouping for details indicative of an eye, and for enabling said pixel modifier in response thereto.
17. The camera according to claim 15 , further comprising an exposure analyzer for determining if the image was recorded in a condition indicative of the red-eye phenomenon.
18. A portable digital camera having no photographic film comprising:
an integral flash for providing illumination during acquisition of an image without photographic film;
a digital image capturing apparatus for acquiring said image; and
a red-eye filter for modifying an area within said image indicative of a red-eye phenomenon.
19. The camera of claim 18 , further comprising a processor and memory to generating and store on the camera a modified image including said image with said area modified.
20. The camera according to claim 18 , further comprising an integral image display for displaying a modified image including said image with said area modified.