A Method Based on the Continuous Spectrum Analysis for Fingerprint Image Ridge Distance Estimation

For several years I have been examining the phenomena presented by various substances when struck by the molecular discharge from the negative pole in a highly exhausted tube. I have ventured to call this discharge “ radiant matter,” and under its influence a large number of substances emit phosphorescent light, some faintly and others with great intensity. On examining the emitted light in the spectroscope most bodies give a faint continuous spectrum, with a more or less decided concentration in one part of the spectrum, the superficial colour of the phosphorescing substance being governed by this preponderating emission in -one or other part of the spectrum. Sometimes, but more rarely, the spectrum of the phosphorescent light is discontinuous, and it is to bodies manifesting this phenomenon that my attention has been specially directed.

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Discrete and continuous spectrum analysis: An alternative perspective on subwavelength imaging

2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS) ◽

10.1109/metamaterials.2016.7746416 ◽

2016 ◽

Author(s):

F. Mesa ◽

A. Forouzmand ◽

A. B. Yakovlev ◽

G. W. Hanson ◽

F. Medina ◽

...

Keyword(s):

Continuous Spectrum ◽

Spectrum Analysis ◽

Subwavelength Imaging ◽

Alternative Perspective ◽

Discrete And Continuous Spectrum

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C. The Continuous Spectrum of Pulsating Variable Stars

Symposium - International Astronomical Union ◽

10.1017/s007418090001901x ◽

1967 ◽

Vol 28 ◽

pp. 177-206

Author(s):

J. B. Oke ◽

C. A. Whitney

Keyword(s):

Continuous Spectrum ◽

Variable Stars ◽

Velocity Fields ◽

The Other ◽

Line Spectrum ◽

Direct Information ◽

Thermodynamic Structure ◽

Diagnostic Interpretation ◽

Pulsating Variable Stars ◽

The Continuum

Pecker:The topic to be considered today is the continuous spectrum of certain stars, whose variability we attribute to a pulsation of some part of their structure. Obviously, this continuous spectrum provides a test of the pulsation theory to the extent that the continuum is completely and accurately observed and that we can analyse it to infer the structure of the star producing it. The continuum is one of the two possible spectral observations; the other is the line spectrum. It is obvious that from studies of the continuum alone, we obtain no direct information on the velocity fields in the star. We obtain information only on the thermodynamic structure of the photospheric layers of these stars–the photospheric layers being defined as those from which the observed continuum directly arises. So the problems arising in a study of the continuum are of two general kinds: completeness of observation, and adequacy of diagnostic interpretation. I will make a few comments on these, then turn the meeting over to Oke and Whitney.

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