| US 7,508,423 B2 | ||
| Method of notification of inadequate picture quality | ||
| Seishi Ohmori, Seongnam-si (Korea, Republic of); and Jong-hum Park, Seoul (Korea, Republic of) | ||
| Assigned to Samsung Techwin Co., Ltd., Changwon (Korea, Republic of) | ||
| Filed on Dec. 09, 2003, as Appl. No. 10/731,240. | ||
| Claims priority of application No. 10-2002-0083207 (KR), filed on Dec. 24, 2002. | ||
| Prior Publication US 2004/0119876 A1, Jun. 24, 2004 | ||
| Int. Cl. H04N 5/235 (2006.01); H04N 5/222 (2006.01); G06K 9/00 (2006.01) | ||
| U.S. Cl. 348—230.1 [348/229.1; 348/222.1; 348/333.04; 348/333.02; 382/168] | 14 Claims |
| 1. A method of determining inappropriate exposure amounts in a digital image, the method comprising:
obtaining a brightness histogram related to data of a digital image;
calculating exactly two statistical values from the brightness histogram that define the digital image, the exactly two statistical
values consisting of a standard deviation in brightness, and
an average brightness;
if the standard deviation in brightness in the histogram is less than a lower limit deviation value and the average brightness
in the histogram is less than a lower limit brightness value, then determining that the exposure amount in the digital image
may be low; and
if the standard deviation in brightness in the histogram is less than a lower limit deviation value and the average brightness
in the histogram is greater than an upper limit brightness value, then determining that the exposure amount in the digital
image may be high.
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