With the development of graphic processing unit(GPU)power,it is now possible to implement geometric correction and edge blending functions on a single computer.However,the processing resources consumed by the geometri...With the development of graphic processing unit(GPU)power,it is now possible to implement geometric correction and edge blending functions on a single computer.However,the processing resources consumed by the geometric correction and edge blending phases still burden the system and slow down the main application considerably.A new platform independent scheme is proposed,minimizing the negative influence on performance.In this scheme,parameters for geometric correction and edge blending are firstly defined in an interactive way and recorded as a 32-bit high dynamic range(HDR) image,which is then used by high level shading language(HLSL) codes embedded in the main application as a lookup table,greatly reducing the computational complexity and enhancing flexibility.展开更多
为了提高HDR(high dynamic range)图像的质量,提出一种针对HDR图像滤噪的新方法。首先取得图像组中相同空间位置的点构成像素组;然后利用相机的ITF(intensity transfer function)还原成亮度值;接着通过求解最小二乘问题拟合L-t(luminanc...为了提高HDR(high dynamic range)图像的质量,提出一种针对HDR图像滤噪的新方法。首先取得图像组中相同空间位置的点构成像素组;然后利用相机的ITF(intensity transfer function)还原成亮度值;接着通过求解最小二乘问题拟合L-t(luminance-exposure time)直线,并用该直线修正各点亮度值;最后再通过ITF转换成像素值。图像组经滤噪之后,再用于合成HDR图像。实验结果表明,该算法运算量小,能有效去除椒盐型噪声,对高斯型噪声抑制效果明显,优于A.&E.(ahmet&erit)算法,这也是该算法的主要特色。展开更多
超高清技术在广播电视、互联网、移动端以及数字电影领域的应用越来越广泛。超高清视频不仅在分辨率和帧率上有所提升,而且体现在高动态范围和宽色域。通过分析学院色彩编码系统(Academy Color Encoding System,ACES)编码和色彩原理,重...超高清技术在广播电视、互联网、移动端以及数字电影领域的应用越来越广泛。超高清视频不仅在分辨率和帧率上有所提升,而且体现在高动态范围和宽色域。通过分析学院色彩编码系统(Academy Color Encoding System,ACES)编码和色彩原理,重点探讨ACES工作流在超高清高动态范围图像(High Dynamic Range,HDR)制作中的应用,通过实际测试提出相应的解决方案,对超高清HDR制作具有一定的参考意义。展开更多
文摘With the development of graphic processing unit(GPU)power,it is now possible to implement geometric correction and edge blending functions on a single computer.However,the processing resources consumed by the geometric correction and edge blending phases still burden the system and slow down the main application considerably.A new platform independent scheme is proposed,minimizing the negative influence on performance.In this scheme,parameters for geometric correction and edge blending are firstly defined in an interactive way and recorded as a 32-bit high dynamic range(HDR) image,which is then used by high level shading language(HLSL) codes embedded in the main application as a lookup table,greatly reducing the computational complexity and enhancing flexibility.
