Solar Image Hashing by Intermediate Descriptor and Autoencoder

2021 ◽  
Author(s):  
Rafal Grycuk ◽  
Rafal Scherer
Keyword(s):  
Image Hashing ◽  
Solar Image

scholarly journals A high-resolution solar spectrum 2000 Å–2200 Å

1970 ◽  
Vol 36 ◽  
pp. 271-273
Author(s):  
B. B. Jones ◽  
B. C. Boland ◽  
R. Wilson ◽  
S. T. F. Engstrom
Keyword(s):  
High Resolution ◽  
Solar Spectrum ◽  
Solar Image ◽  
Roll Control ◽  
North East ◽  
The North ◽  
Alignment System ◽  
Optical Alignment ◽  
South Axis ◽  
System Operating

A high-resolution solar spectrum in the range 2000–2200 Å was obtained in a recent flight of a sunpointing Skylark rocket. This was launched at 04.21 hr UT on April 22, 1969 from Woomera and reached an apogee of 178 km. An optical alignment system operating on the main vehicle pointing system gave a net stabilisation of ±3 arc sec in the position of the solar image relative to the spectrograph slit. The slit, of length 1.0 mm, was set in the north-east quadrant parallel to and 5 arc min from the north/south axis, its lower edge being 1 arc min from the equator. The roll control of ±2.5° was provided entirely by the standard Elliott Bros. type of vehicle stabilisation.

A New Robust Reference Image Hashing System

2021 ◽  
pp. 1-1
Author(s):  
Satendra Pal Singh ◽  
Gaurav Bhatnagar ◽  
Amit Kumar Singh
Keyword(s):  
Reference Image ◽  
Image Hashing

scholarly journals Robust image hashing with compressed sensing and ordinal measures

2020 ◽  
Vol 2020 (1) ◽  
Author(s):  
Zhenjun Tang ◽  
Hanyun Zhang ◽  
Shenglian Lu ◽  
Heng Yao ◽  
Xianquan Zhang
Keyword(s):  
Compressed Sensing ◽  
Image Hashing ◽  
Robust Image ◽  
Robust Image Hashing

A Survey on Solar Image Segmentation Techniques

2014 ◽  
Vol 945-949 ◽  
pp. 1899-1902
Author(s):  
Yuan Yuan Fan ◽  
Wei Jiang Li ◽  
Feng Wang
Keyword(s):  
Image Processing ◽  
Pattern Recognition ◽  
Image Analysis ◽  
Image Segmentation ◽  
Image Retrieval ◽  
Fundamental Issue ◽  
Solar Image ◽  
Segmentation Methods

Image segmentation is one of the basic problems of image processing, also is the first essential and fundamental issue in the solar image analysis and pattern recognition. This paper summarizes systematically on the image segmentation techniques in the solar image retrieval and the recent applications of image segmentation. Then the merits and demerits of each method are discussed in this paper, in this way we can combine some methods for image segmentation to reach the better effects in astronomy. Finally, according to the characteristics of the solar image itself, the more appropriate image segmentation methods are summed up, and some remarks on the prospects and development of image segmentation are presented.

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