Abstract:
A storage pixel sensor disposed on a semiconductor substrate comprises a photodiode having a first terminal coupled to a first potential and a second terminal. A barrier transistor has a first terminal coupled to the second terminal of the photodiode, a second terminal and a control gate coupled to a barrier set voltage. A reset transistor has a first terminal coupled to the second terminal of the barrier transistor, a second terminal coupled to a reset reference potential that reverse biases the photodiode, and a control gate coupled to a source of a RESET signal. A photocharge integration node is coupled to said second terminal of said barrier transistor. The photocharge integration node comprises the control gate of a first source-follower transistor. The first source-follower transistor is coupled to a source of bias current and has an output. A capacitive storage node is coupled to the output of the first source-follower transistor and comprises the control gate of a second source-follower transistor having an output. An exposure transistor is coupled between the output of the first source-follower transistor and a global current-summing node and has a control gate coupled to a saturation level voltage.
Abstract:
An electronic system and method for minimizing the loss of image sharpness caused by image motion during the exposure interval of a camera using electro-optical area array image sensors is provided. Differential speed clocking is performed using a set of parallel shift registers to achieve improved image motion compensation ("IMC") performance. A large number of rows and columns contained in a CCD array are arranged in a variable number of row segments. In situations where IMC is needed, a variable frequency clocking method can be applied to these row segments in the CCD array. This method of parallel shift clocking provides for IMC in a reconnaissance system in low light conditions where narrow shutter widths are not practical. An aerial reconnaissance system user utilizing this IMC method can perform forward oblique reconnaissance missions in a straightforward manner. Complexity in CCD design and processing is reduced with this approach, which is utilized in either a small or large array format CCD.
Abstract:
Embodiments of the present application disclose light field collection control methods and apparatuses and light field collection devices, wherein one light field collection control method comprises: acquiring an aperture parameter of a main lens of a light field camera; determining, according to the main lens aperture parameter, in an image sensor of the light field camera, a local part of an imaging region corresponding to at least one sub-lens in a sub-lens array of the light field camera as a first imaging region; adjusting pixel density distribution of the image sensor, to cause pixel density of the first imaging region after adjustment to be distinguished from that of other parts of the imaging region; and performing light field collection on a scene via the adjusted light field camera. The embodiments of the present application may improve utilization of image sensor pixels in a process of performing light field collection on a scene based on a light field camera, and improve imaging quality of light field images.
Abstract:
Techniques and devices for acquiring and compressing timelapse video are described. The techiques are adaptive, in that the acquisition frame rate is adapted and captured images are periodically deleted during filming. To implement the method, a user need not know ahead of time how long the source video will be acquired. Regardless of the acquisition time, the resulting video is automatically edited to provide a timelapse clip of a predefined length or of a length within a predefined range.