Photographic method and photographic apparatus

1. A photographic method, comprising:

taking, at the same shooting position, a background image without a subject, a first principal image for outputting, and a second principal image whose shooting conditions differ from those of said first principal image; and

extracting said subject based on a first difference between said background image and said first principal image and a second difference between said first principal image and said second principal image.

2. The photographic method according to claim 1 , wherein said extracted subject is composited with an image that is previously prepared for composition.

3. The photographic method according to claim 1 , wherein said extracting step of said subject comprises:

extracting a first subject candidate based on said first difference between said background image and said first principal image;

extracting a second subject candidate based on said second difference between said first principal image and said second principal image; and

setting, as said subject, an area common to said first subject candidate and said second subject candidate.

4. The photographic method according to claim 1 , wherein said first principal image and said second principal image are photographed at different illumination settings.

5. The photographic method according to claim 1 , wherein said first principal image and said second principal image are photographed at different apertures.

6. The photographic method according to claim 1 , wherein a same subject appears in the first principal image and the second principal image.

7. The photographic method of claim 1 , wherein the shooting conditions comprises taking the first principal image with a light source turned on and taking the second principal image with the light source turned off.

8. The photographic method of claims 1 wherein the shooting conditions comprises reducing an amount of light emitted from a light source when the second principal image is taken.

9. A photographic apparatus, comprising:

a camera for photoelectrically picking up an image;

changing means for changing shooting conditions;

shooting controlling means for causing said camera and said changing means to carry out shooting of a background image without a subject, a first principal image for outputting, and a second principal image whose shooting conditions differ from those of said first principal image; and

image processing means for extracting said subject based on a first difference between said background image and said first principal image and a second difference between said first principal image and said second principal image.

10. The photographic apparatus according to claim 9 , wherein said image processing means creates a composite image by compositing said extracted subject with an image that is previously prepared for composition.

11. The photographic apparatus according to claim 10 , further comprising at least one of a printer which outputs, as a print, said composite image created by said image processing means, and recording means which records onto a recording medium said composite image created by said image processing means.

12. The photographic apparatus according to claim 9 , further comprising a light source or sources for illuminating said subject, wherein said changing means sets said light source or sources to different illumination settings for shooting of said first principal image and shooting of said second principal image.

13. The photographic apparatus according to claim 12 , wherein said light source or sources are an LED.

14. The photographic apparatus according to claim 12 , wherein the light source is turned on when the first principal image is shot, and the light source is turned off when the second principal image is shot.

15. The photographic apparatus according to claim 9 , wherein said camera has an aperture and said changing means sets different apertures for shooting of said first principal image and shooting of said second principal image.

16. The photographic apparatus according to claim 9 , wherein a same subject appears in the first principal image and the second principal image.

17. The photographic apparatus of claim 9 , an amount of light emitted from the light source is reduced when the second principal image is shot.