Exposure Settings; Focus - HIKVISION DS-2TD4137-25/W User Manual

Thermal & Optical Bi-spectrum PTZ Network Camera User Manual
• Histogram: Choose for scene with obvious WDR and high temperature difference, can
improve image contrast and enhance image. E.g. the scene contains both indoor and outdoor
scenes.
• Linear: Choose for scene with low temperature difference and the target is not obvious, can
improve image contrast and enhance image. E.g. the bird in forest.
• Self-Adaptive: Choose AGC mode automatically according to current scene.

10.2.4 Exposure Settings

Exposure is controlled by the combination of iris, shutter, and photo sensibility. You can adjust
image effect by setting exposure parameters.
In manual mode, you need to set Exposure Time, Gain and Slow Shutter.

10.2.5 Focus

It offers options to adjust the focus mode and the minimum focus distance.
Focus Mode
Auto
The device focuses automatically as the scene changes. If you cannot get a well-focused
image under auto mode, reduce light sources in the image and avoid flashing lights.
Semi-auto
The device focuses once after the PTZ and lens zooming. If the image is clear, the focus does
not change when the scene changes.
Manual
You can adjust the focus manually on the live view page.
Min. Focus Distance
When the distance between the scene and lens is shorter than the Min. Focus Distance, the lens
does not focus.
Focus Speed
This function is used to adjust the focus speed and only supported in thermal channel.
The higher the value is, the faster the image focus. It is suitable for the image focus from fuzzy to
clear. The lower the value is, the slower the image focus. It is suitable for the slightly adjustment of
focus.
57