rgb

问题 I use this snippet to convert RGB color to CMYK in javascript: function RgbToCmyk(R,G,B) { if ((R == 0) && (G == 0) && (B == 0)) { return [0, 0, 0, 1]; } else { var calcR = 1 - (R / 255), calcG = 1 - (G / 255), calcB = 1 - (B / 255); var K = Math.min(calcR, Math.min(calcG, calcB)), C = (calcR - K) / (1 - K), M = (calcG - K) / (1 - K), Y = (calcB - K) / (1 - K); return [C, M, Y, K]; } } now I want to convert returned CMYK to percentage CMYK. for example this RGB color (171,215,170) become

问题 I use this snippet to convert RGB color to CMYK in javascript: function RgbToCmyk(R,G,B) { if ((R == 0) && (G == 0) && (B == 0)) { return [0, 0, 0, 1]; } else { var calcR = 1 - (R / 255), calcG = 1 - (G / 255), calcB = 1 - (B / 255); var K = Math.min(calcR, Math.min(calcG, calcB)), C = (calcR - K) / (1 - K), M = (calcG - K) / (1 - K), Y = (calcB - K) / (1 - K); return [C, M, Y, K]; } } now I want to convert returned CMYK to percentage CMYK. for example this RGB color (171,215,170) become

问题 I have a screen grabber which gives me a image in YUV 4:2:2 format. I need to convert my byte[]'s to RGB format? Please help, Jason 回答1: You can use this library to convert from RGB, YUV, HSB, HSL and many other color formats, example using the static method at RGB class to convert from YUV, just call RGB rgb = RBB.YUVtoRBG(y, u, v); And the underlying implementation of it: public static RGB YUVtoRGB(double y, double u, double v) { RGB rgb = new RGB(); rgb.Red = Convert.ToInt32((y + 1

问题 i need help converting an 24/32 bit RGB raw image to uiimage. I've tried the examples here from Paul Solt and others, but nothing work. Anybody could please show an example or tutorial? The image data is hold in nsdata and i would like to have a jpg or png image. Thx Thorsten I'm using the code by Paul Solt, it does something, but the image looks like it have four times the image information in one image. i cant post an image here: EDIT: i added the lines at the beginning of the method

问题 I have an image: Original Image I want to remove the grey mesh part of the image without affecting the rest of the image i.e., the part inside the black circle. I have written a code for that import cv2 import numpy as np from PIL import Image imag = Image.open('results.jpg') imag.show() pixelMap = imag.load() img = Image.new( imag.mode, imag.size) pixelsNew = img.load() for i in range(img.size[0]): for j in range(img.size[1]): if (( pixelMap[i,j]> (200,0,0)) and (pixelMap[i,j]< (240,0,0))):

问题 I'm using PHP to query CSS settings from a MySQL database, which is then echoed into a CSS stylesheet. Sample snippet is below: <?php $connect = //connect string $query = ($connect, "SELECT bgcolor, font FROM displays WHERE name = 'mySettings'"); while ($row = mysqli_query($query)){ $bgcolor = $row[bgcolor]; $font = $row[font]; } echo ' body { background-color: #'.$bgcolor.'; font: '.$font.'; } '; ?> The table "displays" has one column for each CSS property that's set. Each row represents a

问题 I’ve been trying to run the “tutorial to get started” with the Kinect libraries (http://nicolas.burrus.name/index.php/Research/KinectUseNestk) but I stumbled across an error. When I try the following line in the CLI: cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo .. I get the following error: CMake Error at D:/Program Files/CMake 2.8/share/cmake-2.8/Modules/FindPackageHan dleStandardArgs.cmake:91 (MESSAGE): Could NOT find OpenNI (missing: OPENNI_LIBRARY OPENNI_INCLUDE_DIR) Call Stack (most recent

问题 This question already has answers here : Formula to determine brightness of RGB color (19 answers) Closed 4 years ago . I am having an array in my javascript with rgb colors. Let's say it looks like this: colors = ['(133,10,22)', '(33,33,33)', '(255,255,255)', '(1,1,1)']; How can I sort this array so as to get the lightest color first and the darkest last? So at the end my array to look like this for example: colors = ['(255,255,255)', '(133,10,22)', '(33,33,33)', '(1,1,1)']; Is there any

问题 im using gstreamer 1.2 to feed frames from my IP camera to opencv program the stream is (640*368 YUVj420p) and i want to convert it to RBG888 to be able to use it in my opencv program so is there a way to use gstreamer to do that conversion ? or do i have to do it by myself? if so please give me the equation that do this conversion 回答1: After some trials with gstreamer i decided to do the conversion myself and it worked First we have to understand the YUVj420p pixel format As shown in the

问题 im using gstreamer 1.2 to feed frames from my IP camera to opencv program the stream is (640*368 YUVj420p) and i want to convert it to RBG888 to be able to use it in my opencv program so is there a way to use gstreamer to do that conversion ? or do i have to do it by myself? if so please give me the equation that do this conversion 回答1: After some trials with gstreamer i decided to do the conversion myself and it worked First we have to understand the YUVj420p pixel format As shown in the