Invention Application
US20050018908A1 Method for compressing digital images to a predetermined size by calculating an optimal quality factor
审中-公开
通过计算最佳质量因子将数字图像压缩到预定尺寸的方法
- Patent Title: Method for compressing digital images to a predetermined size by calculating an optimal quality factor
- Patent Title (中): 通过计算最佳质量因子将数字图像压缩到预定尺寸的方法
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Application No.: US10495351Application Date: 2002-11-06
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Publication No.: US20050018908A1Publication Date: 2005-01-27
- Inventor: Anders Johannesson , Ingemar Larsson
- Applicant: Anders Johannesson , Ingemar Larsson
- Priority: SE0103746-4 20011113
- International Application: PCT/SE02/02011 WO 20021106
- Main IPC: G06T9/00
- IPC: G06T9/00 ; H04N1/41 ; H04N7/26 ; H04N7/30 ; H04N9/07 ; H04N101/00 ; G06K9/36

Abstract:
A method for compressing a digital image composed of a matrix of pixels to provide a compressed digital representation of said image of a predetermined size, the quality of the compressed digital representation being affected by a compression quality factor Q and the method including the fol-lowing steps: for a particular image producing device, developing a mathematical model defining a relationship between the content of the digital image and Q, developing said mathematical model by repeatedly compressing a set of digital test images with varying Q until each test image is compressed to a predetermined size, determining a metric M representing the content of the digital image, applying said metric M in said mathematical model to obtain an image determined quality factor Qmod and compressing the digital image using said quality factor Qmod.
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