A new image warping method is proposed in this letter, which can warp a given image by some manual defined features. Based on the radial basis interpolation function algorithm, the proposed method can transform the or...A new image warping method is proposed in this letter, which can warp a given image by some manual defined features. Based on the radial basis interpolation function algorithm, the proposed method can transform the original optimized problem into nonsingular linear problem by adding one-order term and affine differentiable condition. This linear system can get the steady unique solution by choosing suitable kernel function. Furthermore, the proposed method demonstrates how to set up the radial basis function in the target image so as to achieve supports to adopt the backward re-sampling technology accordingly which could gain the very slippery warping image. Theexperimental result shows that the proposed method can implement smooth and gradual image warping with multi-anchor points' accurate interpolation.展开更多
Background The spatial resolution and the reconstruction efficiency of the main drift chamber of the Beijing Spectrometer III has degraded aftermore than nine years of operation.An improved new inner drift chamber has...Background The spatial resolution and the reconstruction efficiency of the main drift chamber of the Beijing Spectrometer III has degraded aftermore than nine years of operation.An improved new inner drift chamber has been constructed to replace the old chamber in case of the radiation damage.Amonolithic active pixel sensor(MAPS)based detector prototype is selected as one of the prototype schemes for the inner chamber upgrade.Purpose Design a set of MAPS readout electronics system for the inner drift chamber upgrade.This system can verify the function and performance of the selected MAPS chip and discover the matters needing attention when designing large-scale detectors.Methods The electronics system design is composed of three parts.The first part is flexible printed circuit boards(PCBs)assembled with the MAPS chips.The second part is digital readout boards,which are connected to the flexible PCBs via FPGA mezzanine card cables.The digital readout board realizes the configuration of the MAPS chip register,receives and processes the data output by the MAPS chip,and transfers the processed data to the DAQ device.The third part includes a readout control board and two fan-out boards that used to separately fan out the trigger signal and the start signal to all the digital readout boards.Results and conclusion AMAPS readout electronics system consisting of five MAPS based detector prototypes is designed.The system can work stably under the electron beam experimental conditions with a frequency up to 2 kHz and energy ranging from 1 to 5 GeV.The system detection efficiency of the electron beam is∼95%,and the spatial resolution is∼5.3μm at electron energies of 1 GeV.The design of the electronics system meets the requirements for verifying the performance of the MAPS chips and the technical feasibility of the detector structure.展开更多
基金Supported by the National Natural Science Foundation of China (No.60141002).
文摘A new image warping method is proposed in this letter, which can warp a given image by some manual defined features. Based on the radial basis interpolation function algorithm, the proposed method can transform the original optimized problem into nonsingular linear problem by adding one-order term and affine differentiable condition. This linear system can get the steady unique solution by choosing suitable kernel function. Furthermore, the proposed method demonstrates how to set up the radial basis function in the target image so as to achieve supports to adopt the backward re-sampling technology accordingly which could gain the very slippery warping image. Theexperimental result shows that the proposed method can implement smooth and gradual image warping with multi-anchor points' accurate interpolation.
基金This work was supported by a Grant from the National Natural Science Foundation of China(No.U1232202).
文摘Background The spatial resolution and the reconstruction efficiency of the main drift chamber of the Beijing Spectrometer III has degraded aftermore than nine years of operation.An improved new inner drift chamber has been constructed to replace the old chamber in case of the radiation damage.Amonolithic active pixel sensor(MAPS)based detector prototype is selected as one of the prototype schemes for the inner chamber upgrade.Purpose Design a set of MAPS readout electronics system for the inner drift chamber upgrade.This system can verify the function and performance of the selected MAPS chip and discover the matters needing attention when designing large-scale detectors.Methods The electronics system design is composed of three parts.The first part is flexible printed circuit boards(PCBs)assembled with the MAPS chips.The second part is digital readout boards,which are connected to the flexible PCBs via FPGA mezzanine card cables.The digital readout board realizes the configuration of the MAPS chip register,receives and processes the data output by the MAPS chip,and transfers the processed data to the DAQ device.The third part includes a readout control board and two fan-out boards that used to separately fan out the trigger signal and the start signal to all the digital readout boards.Results and conclusion AMAPS readout electronics system consisting of five MAPS based detector prototypes is designed.The system can work stably under the electron beam experimental conditions with a frequency up to 2 kHz and energy ranging from 1 to 5 GeV.The system detection efficiency of the electron beam is∼95%,and the spatial resolution is∼5.3μm at electron energies of 1 GeV.The design of the electronics system meets the requirements for verifying the performance of the MAPS chips and the technical feasibility of the detector structure.
