unicap provides an uniform access to video capture devices. Currently you can access v4l, v4l2, IIDC 1394 ( DCAM ) CAmeras and video to firewire converters with a single API. New devices can be added via a plugin system
标签： access Currently provides capture
上传时间： 2015-08-07
上传用户：cjl42111
This paper introduces an affine invariant of trapezia, and the explicit constraint equation between the intrinsic matrix of a camera and the similarity invariants of a trapezium are established using the affine invariant. By this constraint, the inner parameters, motion parameters of the CAmeras and the similarity invariants of trapezia can be linearly determined using some prior knowledge on the CAmeras or the trapezia. The proposed algorithms have wide applicability since parallel lines are not rare in many scenes. Experimental results validate the proposed approaches. This work presents a unifying framework based on the parallelism constraint, and the previous methods based on the parallelograms or the parallelepipeds can be integrated into this framework. Key words: invariant parallelism constraint camera calibration 3D reconstruction
标签： introduces constraint invariant explicit
上传时间： 2014-01-16
上传用户：6546544
sfrmat is a Matlab function that provides a spatial frequency response* (SFR) from a digital image file containing a slanted-edge feature. The specific edge-gradient algorithm follows the intent of the standard ISO 12233, developed by Technical Committee ISI/TC 42, for resolution measurements for electronic still pictorial CAmeras.
标签： frequency function provides response
上传时间： 2014-01-20
上传用户：qunquan
The concept of the Altera Nios II embedded processor implementation inside Field Programmable Gate Array [FPGA] of the CCD camera for the “Pi of the Sky” experiment is presented. The digital board of the CCD camera, its most important components, current implementation of firmware [VHDL] inside the FPGA and the role of external 8051 microcontroller is briefly described. The main goal of the presented work is to get rid of the external microcontroller and to design new system with Nios II processor built inside FPGA chip. Constraints for implementing the design into the existing camera boards are discussed. New possibilities offered by a larger FPGA for next generation of CAmeras are considered.
标签： implementation Programmable processor embedded
上传时间： 2014-01-02
上传用户：dyctj
This article covers many of the fundamentals of analog video. Video is defined for our purposes here as "moving pictures." Still imaging, like what is found in digital still CAmeras or scanners, is not covered. The requirements for still imaging do have a lot in common with those for video, but the differences are significant enough to be dealt with as a separate discipline.
标签： fundamentals purposes article defined
上传时间： 2013-12-17
上传用户：黑漆漆
VideoMan is a very easy image acquisition library. It is able to manage many video inputs at the same time, such as WDM Firewire and USB CAmeras, PointGrey CAmeras and video files. It can also render the inputs using OpenGL. Suitable for computer vision
标签： acquisition VideoMan library inputs
上传时间： 2017-05-18
上传用户：plsee
VideoMan is a very easy image acquisition library. It is able to manage many video inputs at the same time, such as WDM Firewire and USB CAmeras, PointGrey CAmeras and video files. It can also render the inputs using OpenGL. Suitable for computer vision
标签： acquisition VideoMan library inputs
上传时间： 2013-12-25
上传用户：xlcky
VideoMan is a very easy image acquisition library. It is able to manage many video inputs at the same time, such as WDM Firewire and USB CAmeras, PointGrey CAmeras and video files. It can also render the inputs using OpenGL. Suitable for computer vision
标签： acquisition VideoMan library inputs
上传时间： 2014-01-11
上传用户：xsnjzljj
VideoMan is a very easy image acquisition library. It is able to manage many video inputs at the same time, such as WDM Firewire and USB CAmeras, PointGrey CAmeras and video files. It can also render the inputs using OpenGL. Suitable for computer vision
标签： acquisition VideoMan library inputs
上传时间： 2017-05-18
上传用户：xauthu
In engineering, compensation is planning for side effects or other unintended issues in a design. The design of an invention can itself also be to compensate for some other existing issue or exception. One example is in a voltage-controlled crystal oscillator (VCXO), which is normally affected not only by voltage, but to a lesser extent by temperature. A temperature-compensated version (a TCVCXO) is designed so that heat buildup within the enclosure of a transmitter or other such device will not alter the piezoelectric effect, thereby causing frequency drift. Another example is motion compensation on digital CAmeras and video CAmeras, which keep a picture steady and not blurry.
标签： compensation engineering unintended planning
上传时间： 2013-12-11
上传用户：z754970244
