LevelOne FCS-5044 Manual - Page 34
Video Setting
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Network Camera User's Manual local utility. Change the frequency setting to eliminate uncomfortable flash image when the light source is only fluorescent light. 4. "Video orientation" The orientation of video (1) "Flip" Vertically rotate the video. (2) "Mirror" Horizontally rotates the video. 5. "Low lux mode" The video quality will be improved when the camera is in low lux environment. Video Setting Advanced Mode 1. Exposure setting Here it provides 3 mode: Auto, BLC and HSBLC. Auto and HSBLC modes are 2 default settings for general purpose and backlight scene, respectively. "Target Luminance and Offset" These two slide bar, Target Luminance and Offset represent the expected target value of the luminance of the weighting result of AE windows in the image and its tolerance as offset. For example, target luminance is set to 100 and target offset is set to 20 that means the average luminance of the AE window should be in the range from 80 to 120 (100±(10. When the actual luminance does not meet this range, the AE function will adjust shutter and gain to meet it as possible. In some extreme cases, it cannot reach the target because the environment is too bright or dark. When the environment is not consistent, e.g. with big moving objects, and the offset is too narrow, the AE will act more frequently that will cause the background of view inconsistent. The offset value is recommended to set 15~25% of target luminance. "Shutter Speed" There are 2 fields, minimal and maximal time, for the range of Shutter Speed. The precision of the parameter is 1/50000 sec., but it is NOT actual precision of the shutter speed of the sensor. The actual precision of the shutter speed depends on each sensor's specification. Here it will be rounded to approach sensor's effective exposure time. To avoid flickering or banding phenomenon under fluorescent light, the actual shutter speed will be locked at 1/120, 1/60, 1/30 if Power Line Frequency is 60Hz, or 1/100, 1/50, 1/25 if Power Line Frequency is 50Hz. The setting of Power Line Frequency is on the sub-tab Video and Audio. The exposure may not be stable if the maximum value and the minimum one are set to the same value without adjustable interval. Besides, the frame rate will drop down if the actual shutter speed is too slow to meet expected frame rate. 34/63