城市复古建筑景观图像色彩自动调节仿真

Simulation of Automatic Adjustment of Urban Vintage Architectural Landscape Image Color

针对当前色彩调节方法存在亮度偏差较大、调节时间过长等问题,提出基于色彩映射算法的城市复古建筑景观图像色彩自动调节方法。通过Gamma校正算法对图像进行校正计算得到校正系数,利用校正系数对色彩与亮度进行调整,得到校正函数,对色彩校正函数进行求解,完成对图像的色彩校正。在图像校正结果的基础上,设定R、G、B通道的响应曲线,通过响应曲线得到对应通道每个图像像素点的照度值,采用色彩映射算法在照度值中提取增益系数,通过增益参数完成对色彩的调节。仿真结果证明,所提方法有效地降低了图像的亮度偏差,提高了色彩分辨率。

At present,the color adjustment method has large brightness deviation and long adjustment time.This paper puts forward a method to automatically adjust color of urban retro architecture landscape image based on color mapping algorithm.First of all,the Gamma correction algorithm was used to correct and calculate the image to obtain the correction coefficient.Secondly,color and brightness were adjusted through the correction coefficient,and then correction function was obtained.Thirdly,the color correction function was solved to complete the color correction of image.Based on the result of image correction,the response curves of R channel,G channel and B channel were deterrained to obtain the illuminance value of each image pixel in corresponding channel.Finally,the color mapping algorithm was used to extract the gain coefficient from the illuminance value.Thus,the gain parameter was used to finish the adjustment of color.Simulation results show that the proposed method can effectively reduce the brightness deviation of image and improve the oolor resolution.