Video endoscopic camera/software from Kettex Development
A Sight Tracking


We are producers of USB endoscopic cameras and software. Our cameras provide superb images and our software provides unique features. The cameras and software comply with MDR.


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Contact Info:

  • Kettex Development s.r.o.
  • Pod vodárenskou věží 4, Prague
  • Czech Republic
  • E-mail: info@kettex.eu
  • Cell phone: +420 728 526 720


Sight Tracking AEXP


Today I want to tell you more about technology called Sight Tracking AEXP. The use is similar to the previous case, but the solution is different. Let's go to the boring basics first.

Exposure - affects how light the picture is. If camera exposure increases, the longer the time (exposure time) the photons hit the camera chip - the higher the exposure, the brighter the image. The lower the exposure, the darker the picture.

Automatic Exposure (AEXP) - all cameras on the market use AEXP - modify the exposure settings themselves to get the picture just right. For example, when an object gets closer to the tip of an endoscope, it hits and reflects more light off the object than when it was farther away. If the exposure itself did not change the picture would be too bright. So the exposure changes itself so that the picture is optimally bright.

Area of Interest (AoI) – for AEXP, it is important to know by which area to change exposure. If an object appears on the edge of field of view, is it more interesting than what's in the middle? Most cameras do this by trying to get the light center of vision right, because they assume that what's in the center of the screen is the most interesting thing for doctors.

Change the AoI - sometimes it becomes impossible to move the endoscope or the MD AoI is just completely off the center of the screen (for example nasal tonsils at mouth entry), or the field of view is so broken that some of the areas are over-lit and a lot under-lit. A Sight Tracking allows you to change the AoI of auto exposure depending on where doctor is looking. This is not new technology, the most interesting thing about it is being able to detect the direction of a doctor's gaze quickly, steadily, and independently of the background. Of course, it's far easier to add Sight Tracking's ability to a USB camera and computer system than it is to hardwire it into an endoscopic tower. The proof may be that no one else has this technology in the endoscopic field today.

#sighttracking