Method of notification of inadequate picture quality
View Patent ↗In a digital camera including a digital signal processing portion processing a digital image and a display device displaying the image according to a digital signal from the digital signal processing portion, and a control portion controlling overall operation, after the user takes a picture, image data is analyzed by the digital signal processing portion to determine picture quality and, when it is determined that the picture quality is inadequate, the user is informed of information regarding the quality of the picture.
1. A method of determining inadequate quality in a digital image, the method comprising:
ascertaining the resolution and the compression rate of the digital image;
ascertaining a lower limit file size value appropriate for the ascertained resolution and compression rate;
comparing the file size of the digital image with the ascertained lower limit file size value; and
if the digital image file size is less than the ascertained lower limit file size value, determining that an exposure amount in the digital image may be inadequate.
2. A method of determining inadequate quality in a digital image captured by a digital camera, the method comprising:
ascertaining the resolution and the compression rate of the digital image;
ascertaining a lower limit file size value appropriate for the ascertained resolution and compression rate;
comparing the file size of the digital image with the ascertained lower limit file size value; and
if the digital image file size is less than the ascertained lower limit file size value, determining that the digital camera suffered from excessive movement while capturing the digital image.
3. The method of claim 1 , the method further comprising:
if the digital image file size is less than the ascertained lower limit file size value, displaying a notification indicating that the quality of the digital image may be inadequate.
4. A method of determining inadequate quality in a digital image, the method comprising:
ascertaining the resolution and the compression rate of the digital image;
ascertaining a lower limit file size value appropriate for the ascertained resolution and compression rate;
comparing the file size of the digital image with the ascertained lower limit file size value;
if the digital image file size is less than the ascertained lower limit file size value, determining that the quality of the digital image may be inadequate; and
if the digital image file size is less than the ascertained lower limit file size value, displaying a notification indicating that an exposure amount in the digital image may be inappropriate.
5. The method of claim 2 , further comprising:
if the digital image file size is less than the ascertained lower limit file size value, displaying a notification indicating that the digital camera suffered from excessive movement while capturing the digital image.
6. A method of determining inadequate quality in a digital image, the method comprising:
ascertaining the resolution and the compression rate of the digital image;
ascertaining a lower limit file size value appropriate for the ascertained resolution and compression rate;
comparing the file size of the digital image with the ascertained lower limit file size value; and
if the digital image file size is less than the ascertained lower limit file size value, determining that the quality of the digital image may be inadequate,
wherein the lower limit file size value for a particular resolution and compression rate is determined by taking the difference between an average file size value of sample images at the same resolution and compression rate and an adjustment coefficient multiplied by the standard deviation of the sample images at the same resolution and compression rate.
7. A method of determining inadequate quality in a digital image, the method comprising:
ascertaining the resolution and the compression rate of the digital image;
ascertaining a lower limit file size value appropriate for the ascertained resolution and compression rate;
comparing the file size of the digital image with the ascertained lower limit file size value; and
if the digital image file size is less than the ascertained lower limit file size value, determining that the quality of the digital image may be inadequate,
wherein the lower limit file size values are found in a lookup table.
8. The method of claim 7 , wherein the lookup table contains lower limit file size values for particular resolutions and compression rates.
9. The method of claim 1 , wherein the digital image is taken by a digital camera.
10. The method of claim 1 , wherein the method is performed by a digital camera.
11. The method of claim 10 , wherein the digital camera comprises a digital signal processor that performs the method.
12. The method of claim 4 , wherein the digital image is taken by a digital camera.
13. The method of claim 4 , wherein the method is performed by a digital camera.
14. The method of claim 13 , wherein the digital camera comprises a digital signal processor that performs the method.
15. The method of claim 6 , wherein the digital image is taken by a digital camera.
16. The method of claim 6 , wherein the method is performed by a digital camera.
17. The method of claim 16 , wherein the digital camera comprises a digital signal processor that performs the method.
18. The method of claim 7 , wherein the digital image is taken by a digital camera.
19. The method of claim 7 , wherein the method is performed by a digital camera.
20. The method of claim 19 , wherein the digital camera comprises a digital signal processor that performs the method.