List of Articles طیف‌های مرتبه بالاتر

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  1 - Blind Correction of Lens Aberration Using Modified Zernike Moments
  kambiz rahbar karim faez
  The quality of the image formed by an optical system is reduced by aberrations. This paper points out and attempts to correct blindness of lens aberration. Therefore modified Zernike moments were introduced to present lens aberration model within which their coefficient More

  The quality of the image formed by an optical system is reduced by aberrations. This paper points out and attempts to correct blindness of lens aberration. Therefore modified Zernike moments were introduced to present lens aberration model within which their coefficients were estimated through poly-spectral analysis. The model parameters are divided into asymmetric and symmetric which are estimated through bi-coherence and tri-coherence respectively. The obtained precision compares favorably to the aberration given by state of the art ploy-spectral analysis and reaches a RMSE of 0.1 pixels. Manuscript profile
• Open Access Article
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  • Full-Text
  
  2 - Correcting camera lens misalignment using Zernik moments
  kambiz rahbar karim faez
  ۷۲۹ / ۵٬۰۰۰ The reduction of image quality in an optical system depends on different parameters such as lens aberration, digitization error and system assembly error. Among these, the present article aims to study the astigmatism of the lens and correct and compensate More

  ۷۲۹ / ۵٬۰۰۰ The reduction of image quality in an optical system depends on different parameters such as lens aberration, digitization error and system assembly error. Among these, the present article aims to study the astigmatism of the lens and correct and compensate its astigmatism defect. For this purpose, Zernike moments are introduced for the modeling of Abirai and its coefficients are classified into two classes, symmetric and asymmetric. Then these coefficients are estimated using multispectral analysis. For this purpose, tri-coherence analysis has been used to estimate the coefficients of symmetrical sentences, and bi-coherence analysis has been used for the coefficients of asymmetric sentences. Considering the accuracy of the obtained results in comparison with the results of Abirai estimation using multi-spectral analysis, it shows that the proposed method can achieve an accuracy of 0.1 pixel. ارسال بازخورد Manuscript profile