The Research And Implementation Of The Key Technology Of The Image Mosaic SoC

Image mosaic is the new hotspot in the image processing research. At the presentage, people’s demand for image quality is increasing. The images captured by oneCMOS sensor failto meet some special requirements. As a result, the multi-sensorimaging system comes into our life. Image mosaic is one of the most significantalgorithms in the multi-sensor system. Through it, two or more small pictures withoverlapped area can be stitched together into one wide view panoramic image.Focus on the need of image mosaic, this thesis provides an image mosaicalgorithm based on the corner points and the spectrum comparison. And the keytechnologies in the image SoC are researched and implemented as well. The mosaicSoC can join two pictures with15%overlapped area into on image.In this thesis, the steps of image mosaic processing are introduced at first. Thenthe thesis illustrates the algorithms in these steps briefly. After comparing theadvantages and defects of these algorithms, a new mosaic algorithm for hardwareimplementation is given. Then the circuit of this algorithm is designed as well as theSoC architecture. To overcome the difficulties in hardware system design, FIFO andpipeline are used to control the timing. Considering the hardware consumption andthe system speed, this system is designed in a compromising way. Taking theadvantage of module reuse, the hardware consumption is in a low level. The SoCprovided in the thesis is based on the Xilinx LX110T development kit and usingMicroBlaze as the central processor to dispatch the image data. The SystemACEmodule is adapted to access the image data in the CF card.Through the simulation from Matlab, the algorithm which is given in this thesiscan select out3pairs of corresponding point in different scale transform. At last, twoimages with10%difference are joined into one image. Through the hardwaresimulation and synthesis report, the SoC can fuse two images quickly and precisely.