Title :
Wavelet transform-based autofocus camera systems
Author :
Widjaja, Joewono ; Jutamulia, Suganda
Author_Institution :
Inst. of Sci., Suranaree Univ. of Technol., Nakorn Ratchasima, Thailand
Abstract :
A new autofocusing mechanism based on wavelet transform is proposed. Our proposed method takes advantage of the fact that an autocorrelation of a wavelet-transformed signal gives a sharper correlation peak than a conventional autocorrelation does
Keywords :
CCD image sensors; cameras; correlation methods; image processing; optical focusing; wavelet transforms; CCD camera; autocorrelation; autofocus camera systems; lens position control; wavelet transform-based autofocusing; wavelet-transformed signal; Autocorrelation; Cameras; Charge-coupled image sensors; Focusing; Image edge detection; Layout; Lenses; Pulse measurements; Ultrasonic variables measurement; Wavelet transforms;
Conference_Titel :
Circuits and Systems, 1998. IEEE APCCAS 1998. The 1998 IEEE Asia-Pacific Conference on
Conference_Location :
Chiangmai
Print_ISBN :
0-7803-5146-0
DOI :
10.1109/APCCAS.1998.743655
