替代加密:
A B C D E F G H I J K L M N O P Q R S T U V W 密文
Y Z D M R N H X J L I O Q U W A C B E G F K P 明文
X Y Z
T S V
I HAVE A DREAM!#
密文??
用ARM編程實現替代加密。
ellipse detection using the hough transform 作者 H.K. Yuen, J. Illingworth and J. Kittler
Department of Electronics and Electrical Engineering
University of Surrey, Guildford。對霍夫變換檢測檢測橢圓的原理有一定的參考意義。