| 摘要 |
PROBLEM TO BE SOLVED: To improve the judging precision of day/night and to improve the recognition precision and the monitoring precision of an object by judging day/ night from a luminance average in a prescribed designation area and recognizing the object through the use of an image processing technique different between day/night. SOLUTION: An image input part 1 fetches an image photographed by an image pickup device such as a monitor camera installed outdoor as a monitor image and temporarily stores it in an internal image memory. A luminance detection part 2 obtains the luminance of each pixel within a designated area previously fixed from among the monitor image stored in the image memory and obtains a value obtained by dividing the total sum by the number of pixels within the designated area. A day/night judging part 3 judges day/night from the luminance average obtained by the luminance detection part 2. A day-time recognition part 4a and a night time recognition part 4b image-processes the monitor image stored in the image input part 1 by using image processing techniques different between day/night based on a judging result at the day/night judging part 3 and recognizes the object. |
