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    • 8. 发明授权
    • 지문영상의 품질에 기초한 선택적 영상압축장치 및 방법, 그리고 이를 이용한 인증장치
    • 基于指纹图像质量的选择性图像压缩的装置和方法以及使用其进行认证的装置
    • KR100957073B1
    • 2010-05-13
    • KR1020080115361
    • 2008-11-19
    • 고려대학교 산학협력단
    • 정용화홍승우이성주김학재
    • H04N1/41H04N1/387G06K9/00
    • H04N1/41H04N1/387H04N1/442
    • PURPOSE: An apparatus and a method for selective image compression based on the quality of a fingerprint image, and an apparatus for authentication using the same are provided to prevent the damage caused by quality degradation of a compressed image by compressing an original fingerprint image based on a calculated compression ratio. CONSTITUTION: An image quality measurement unit(110) measures an inputted original fingerprint image, and a compression ratio calculator(120) calculates the compression ratio of the original fingerprint image based on a preset reference quality value and a quality value of the original fingerprint image. If the quality value of the original fingerprint image is larger than the reference quality value, an image compression unit(130) compresses the original image based on the compression ratio.
    • 目的:提供一种基于指纹图像质量的选择性图像压缩的装置和方法,以及使用其的认证装置,以通过压缩原始指纹图像来防止由压缩图像的质量劣化引起的损坏 计算压缩比。 构成:图像质量测量单元(110)测量输入的原始指纹图像,并且压缩比计算器(120)基于预设的参考质量值和原始指纹图像的质量值来计算原始指纹图像的压缩比 。 如果原始指纹图像的质量值大于参考质量值,则图像压缩单元(130)基于压缩比压缩原始图像。