Multiple Exposure to Increase Image Resolution and Dynamic Range using Zoom Lens and Different Aperture

Case ID:

This innovation is a method to increase image resolution by using multiple exposures and different aperture settings, combining them to create a high dynamic range image. Images can be taken at different or same exposure times and the exact aperture setting can be determined by the user or by an initial estimate of the dynamic range of the scene. A high resolution and high dynamic range image can be generated by multiple exposure taken at different zoom and aperture settings. This practical technique does not require much computation overhead compared with current systems, and can be done with existing hardware to improve the operation of existing and new cameras.  

The image resolution of many cameras is often limited by the number and size of the pixel. One common problem in imaging is the finite dynamic range of the sensor. An image taken at the optimal exposure condition can have saturated highlights, flat shadows, or both. The main cause of the problem is that the intensity range of the scene is often larger than the dynamic range of the imaging system. This technique is different from existing improvement methods of shifting the sensor relative to the image by a fraction of a pixel pitch and/or using machine learning to generate higher resolution image.


  • Improve image resolution


  • Can be used with existing hardware
  • Fast
  • Adjustable
  • Easy to use 
  • Does not require editing software
Patent Information:
Contact For More Information:
Richard Weite
Senior Licensing Manager, College of Optical Sciences
The University of Arizona
Lead Inventor(s):
Stanley Pau
Amit Ashok