发明名称 |
METHOD FOR COMPRESSING DIGITAL IMAGES TO A PREDETERMINED SIZE BY CALCULATING AN OPTIMAL QUALITY FACTOR |
摘要 |
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. |
申请公布号 |
EP1457054(A1) |
申请公布日期 |
2004.09.15 |
申请号 |
EP20020783916 |
申请日期 |
2002.11.06 |
申请人 |
DIASEMI DIALOG SEMICONDUCTOR AB |
发明人 |
JOHANSSON, ANDERS;LARSSON, INGEMAR |
分类号 |
G06T9/00;H04N1/41;H04N7/26;H04N7/30;H04N9/07;H04N101/00;(IPC1-7):H04N7/30 |
主分类号 |
G06T9/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|