2020年2月11日 · The formula documented for OpenCV’s RGB to YCrCb transformation is given as. Where the RGB to YUV as explained on Wikipedia is . Note that the CrCb channels appear to be backwards to UV channels and the constants are different. The delta’s are just normalization values. The answer here does not really shed light on the details.

2017年4月3日 · Why YCrCb colour model space? YCrCb is one of multiple colour models that separate intensity from colour information. This has various applications. One important application and kind of the reason why YCrCb was introduced is transmission of colour TV signals. RGB is quite redundant and humans are more sensitive to intensity than to colour ...

I want to split YCrCb to Y, Cr, and Cb channels. Code works well but when I show the channels with imshow("Y", y) for each Y, Cr, Cb, all channels look grey. Only Y channel must be grey the others are supposed to be colorful.

2018年11月21日 · What is the range of values in HSV, YCrCb and LAB color spaces in opencv python. For example in RGB, R -> 0-255, G -> 0-255 and B -> 0-255. What is the valid range for the mentioned color spaces. Thanks

2015年6月11日 · The Cb and Cr components of the YCbCr, or YCC, color space are not immediately physically intuitive. Cb and Cr respectively represent the blue-difference and red-difference chroma signals as you noted.

2019年11月3日 · The following equations Cb = 0.564(B - Y), Cr = 0.713(R - Y) are incorrect. Instead of Cb, and Cr they should be named Pb and Pr.

2015年5月6日 · When checking whether results are correct (original->YCrCb->RGB), some of pixels differ by one, e.g 201->200. Average percent of precision errors is 0.1%, so it's not critical.

2014年4月30日 · You mean "flag names" and not "flag values". The values are, actually, the same: 36 (and 37 for RGB2YCrCb): ./imgproc.hpp:580: COLOR_BGR2YCrCb = 36, //!< convert RGB/BGR to luma-chroma (aka YCC), @ref color_convert_rgb_ycrcb "color conversions" ./imgproc/types_c.h:159: CV_BGR2YCrCb =36, - and now try import cv2; print(cv2.COLOR_BGR2YCR_CV)

2015年5月15日 · So I understand how to convert a BGR image to YCrCb format using cvtColor() and seperate different channels using split() or mixChannels() in OpenCV. However, these channels are displayed as grayscale images as they are CV_8UC1 Mats. I would like to display Cb and Cr channels in color like Barns image on Wikipedia.

2018年10月4日 · For the colorspaces available, you can generally transform both ways---COLOR_BGR2YCrCb (i.e. BGR-to-YCrCb) and COLOR_YCrCb2BGR (i.e. YCrCb-to-BGR). Also, OpenCV uses BGR ordering, not RGB ordering. Regardless, to answer the specific question at hand, simply convert back using the opposite order of the colorspaces: