PROBLEM TO BE SOLVED: To conduct gamma correction of a printer on a monitor screen without using a measuring instrument. SOLUTION: An image display system 7 allows an output device 4 to print out data 3 of a test image and allows a display device 1 to display the data 3 on a monitor....
参考 http://www.cambridgeincolour.com/tutorials/gamma-correction.htm https://blog.csdn.net/lxy201700/article/details/24929013 https://blog.csdn.net/linqianbi/article/details/78617615 Gamma校正的快速算法及其C语言实现
http://www.cambridgeincolour.com/tutorials/gamma-correction.htm Gamma校正的快速算法及其C语言实现 One day,I will say "I did it"
使用LUT实现Gamma 校正的C++ 代码 #include<iostream>#include<opencv2/opencv.hpp>usingnamespacestd;usingnamespacecv;// 存储 gamma LUT 的数组uint8_tgammaLUT[256]={0};void_gammaCorrection(Mat&src,Mat&dst,floatK){src.copyTo(dst);for(inti=0;i<256;i++){floatf=i/255.0f;// 注意不可以写成 i...
本小组利用伽马校正(Gamma Correction)进行舌象图片亮度的自动校正。伽马校正又叫伽马非线性化或伽马编码,是用来针对影片或是影响系统里对于光线的辉度或是三色刺激值所进行的非线性的运算或反运算。具体公式讲解与示意图如下: (1)当γ<1时,在低灰度值区域内,动态范围变大,进而图像对比度增强;在高灰度值区域内,动...
Let’s test that theory. Here’s an image I made using Eric’s gamma grayator utility, enlarged using both methods:OriginalCorrect gammaIncorrect gammaIn this case it’s clear that the “correct” image really is the correct one. The incorrect one is too dull and gray. So, unfortunately,...
Mat img = Imgcodecs.imread("test.jpg"); Mat gammaImg = new Mat(); gammaCorrection(img, gammaImg, 2.2f); HighGui.imshow("Original image", img); HighGui.imshow("Gamma corrected image", gammaImg); HighGui.waitKey(0); HighGui.destroyAllWindows(); ...
}returnresultImage; }intmain() { Mat srcImage= imread("test.jpg");if(!srcImage.data) { printf("could not load image...\n");return-1; }//取两种不同的gamma值floatgamma1 =3.33f;floatgamma2 =0.33f;floatkFactor1 =1/gamma1;floatkFactor2 =1/gamma2; ...
accuracy for dark intensities at the expense of lighter intensities. Both of these problems are resolved using gamma correction, which is to say the intensity of every pixel in an image is put through a power function. Specifically, gamma is the name given to the power applied to the image....
IMAGE_PATH='./Img_GammaCorrection.bmp' GAMMA=1/2.8 ''' 读入灰度图像,转为二维numpy数组 ''' def readImage(imagePath): return imageio.imread(imagePath) ''' 返回经过Gamma变换的图像 ''' def gammaCorrection(sourceImage, Gamma): targetImage = np.zeros(sourceImage.shape, dtype=np.uint8) # ...