HydroCam Camera User Manual
HydroCam Camera for Remote Visual Site Inspection
Quality
JPEG image relative quality in percentage from 1 to 100, where 100 is best quality and least
compression, resulting in largest image for the given resolution. Default value 75 will be shown and
used if an invalid value is found in the Flash on device startup.
JPEG maximum size
The JPEG maximum le size is a decimal number in kB which species the maximum JPEG le size
generated after a snapshot is taken. The camera will try to reduce the quality in several steps to get
the le size below the specied limit, and it will generate the minimum le possible if the goal could
not be reached. The value 0 means no limit in size is required (no quality reduction is done over the
one set in the Flash already). Other values represent maximum JPEG le size requirement in kilobytes,
but please note that it may not be possible for HydroCam to satisfy this requirement, and in this
case, it will start decreasing image quality internally, starting from the maximum possible quality,
but without changing the quality parameter stored in the Flash memory. As soon as the resulting
JPEG le is at or below the required le size, the search will terminate and the le will be generated
with the quality reached. If no requirement was met, the resulting le size will be whatever was
accomplished in the last step.
Night mode
Changes the camera mode according to the given parameter which can be either off, on or auto.
In off mode, the IR lter in the camera is always active. In on mode, the IR lter is disabled and the
camera gives a black and white image. In auto mode, the camera measures the current level of
environmental illumination and automatically selects the optimal mode for the IR lter.
IR LED mode
Changes the camera’s IR LED mode according to the given parameter which can be either off, on or
auto. In off mode, the IR LEDs are always off. In on mode, the IR LEDs are on during the night, and
off during the day. In auto mode, the IR LEDs are active only during image acquisition, autofocus or
manual zoom or focus operations.
Autofocus point
Congures the point used for the autofocus operation. The x and y coordinates are specied as a
percentage of the image size with (0,0) being at the bottom left. The values are in the 0 to 100 range.
Change of autofocus coordinates is not applied until a new autofocus request is made (the Geolux
Instrument Congurator application handles this step internally). Please note that autofocus is also
performed in the background of the zoom operation, but this autofocus does not use these autofocus
point coordinates, as focus in that case is always in the middle of the image, i.e. the autofocus point
is (50,50). Using the Geolux Instrument Congurator which is described in chapter 8 of this user
manual, the autofocus point can be set either by manually inputing the values or by selecting a point
on the image which is shown on the right side of the window when the Autofocus point setting
is selected. If a snapshot has been taken and the image has been acquired, the last image will be
shown. If no snapshot has been taken (or the camera is connected via RS-485 interface and the
image can’t be acquired after taking a snapshot), a blank canvas will be shown instead of the image.
