What Is Astronomical Image Processing?

Astronomical image processing is the research carried out in the field of astronomy by applying image processing technology, which is one of the main means of photoelectric detection of space targets. At present, many astronomical observatories at home and abroad have established various astronomical image acquisition and processing systems based on CCD technology. The image acquisition and processing system generally consists of a CCD sensor, an image acquisition system and an image processing system. Use image enhancement, image restoration, and image segmentation for processing.

A digitized image is mathematically equivalent to a matrix. Many methods of image processing are based on this. There are many methods for image processing, and there are many classification methods.For example, they can be divided into linearization and nonlinear methods according to the processing method.They can be divided into image enhancement, image recovery, image segmentation, image compression, and image understanding according to the processing purpose. The number of image frames can be divided into single-frame image processing and image sequence processing methods.

Astronomical image processing is the application of image processing technology in the field of astronomy. At present, many astronomical observatories at home and abroad have established various astronomical image acquisition and processing systems based on CCD technology. However, their image processing processes are generally

The CCD-based astronomical image acquisition and processing system generally consists of a CCD sensor, an image acquisition system, and an image processing system.

Taking the CCD astronomical image processing system as an example, since the data acquisition card is based on the PCI bus, the connection between the acquisition card and the industrial computer is first realized through a PCI-CPCI-conversion board.

Astronomical image processing image processing system

Real-time data processing is mainly achieved through an extended signal processing board. The signal processing board is embedded in the industrial computer through the CPCI slot, and the industrial computer and the signal processing board perform their respective functions.

Since the background image and the flat field image can be calculated in advance, this part of the work is completed by software on the industrial computer and sent to the signal processing board in DMA mode through the CPCI bus and saved to the large-capacity SDRAM on the Wu, which can reduce Calculate the burden of the flat field and background on the hardware.

CCD Astronomical image processing CCD sensor and image acquisition system

The front-end CCD sensor and image acquisition system together form a CCD camera. The image acquisition system and image processing system are interconnected through a high-speed data bus. The embedded CCD astronomical image processing system based on DSP can be integrated with the CCD sensor and image acquisition system to form a CCD camera with image processing capabilities. ^[2]

After the system enters the working state, the analog data output by the CCD camera is digitized by an image acquisition card and written to a section of memory of the industrial computer.At this time, the software on the industrial computer saves the original data to the disk, and at the same time the data is passed through the CPCI bus to DMA Way to the signal processing board. The FPGA performs the background reduction and flat field removal operations on the transmitted data and writes the results to the DPRAM at the input.The data in the input is processed accordingly according to different working modes, and the processing results are written to the output. In the end, the host reads out the processing result in DMA mode through the CPCI bus, and processes and displays the returned clean fruit according to different working modes.

After the system enters the working state, the analog data output by the CCD camera is digitized by an image acquisition card and written to a section of memory of the industrial computer.At this time, the software on the industrial computer saves the original data to the disk, and at the same time the data is passed through the CPCI bus to DMA Way to the signal processing board. The FPGA performs the background reduction and flat field removal operations on the transmitted data and writes the results to the DPRAM at the input.The data in the input is processed accordingly according to different working modes, and the processing results are written to the output. In the end, the host reads out the processing result in DMA mode through the CPCI bus, and processes and displays the returned clean fruit according to different working modes.