()vpopenCVnumber . In this article, youll see how to convert LAB to RGB in OpenCV. Your email address will not be published. You probably want to use an image's convert method: In case of numpy array, I use this solution: in which the argument rgba is a numpy array of type uint8 with 4 channels. import cv2 import numpy as np import matplotlib.pyplot as plt ##### # We use OpenCV to load an image to memory represented in a . This is unusual considering that RGBA(0,0,0,1) is fully opaque black. You need to just follow these steps: If OpenCV is not installed, then first install it using this code. Embedded hyperlinks in a thesis or research paper, English version of Russian proverb "The hedgehogs got pricked, cried, but continued to eat the cactus", Canadian of Polish descent travel to Poland with Canadian passport. Sorry for the trouble. I just need to remove the A channel from some images. COLOR_BGRA2YUV_I420Python: cv.COLOR_BGRA2YUV_I420 | OpenCV supports a wide variety of programming languages like Python, C++, Java, etc. When reading a color image file, OpenCV imread() reads as a NumPy array ndarray of row (height) x column (width) x color (3). In this step, convert the image from Lab to RGB using cv2.cvtColor() function. The colorsys module defines bidirectional conversions of color values between colors expressed in the RGB (Red Green Blue) color space used in computer monitors and three other coordinate systems: YIQ, HLS (Hue Lightness Saturation) and HSV (Hue Saturation Value). Why do men's bikes have high bars where you can hit your testicles while women's bikes have the bar much lower? A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. ', referring to the nuclear power plant in Ignalina, mean? rev2023.5.1.43404. The parameter code when converting from RGB to BGR is cv2.COLOR_RGB2BGR. Can I use my Coinbase address to receive bitcoin? Data Structures & Algorithms in Python; Explore More Self-Paced Courses; Programming Languages. We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. The conversion from a RGB image to gray is done with: More advanced channel reordering can also be done with cv::mixChannels. This method simply removes the alpha channel from the RGBA images, the transparency will turn into black (or sometimes noises) in the resulting images. There is an algorithm for this (from this wikipedia link): Now, the conversion is defined as (in complete psuedo code here! Ironically, having just tried to use my solution to do this, I agree that my original answer, although it made its own kind of sense, didn't really work for most applications. EDIT: In your question you said you want a white background - in that case just fix BGColor to 255,255,255. http://en.wikipedia.org/wiki/Alpha_compositing#Alpha_blending. It returns an RGBA tuple of four floats from 0-1. c: It is a matplotlib color or a np.ma.masked color. I deleted mine and hope you bubble up, since you explained the matters way better :). The Bayer pattern is widely used in CCD and CMOS cameras. The OpenCV function imwrite() that saves an image assumes that the order of colors is BGR, so it is saved as a correct image. Popular Python code snippets. It'd be better if it was more complete. It enables you to get color pictures from a single plane where R, G, and B pixels (sensors of a particular component) are interleaved as follows: The output RGB components of a pixel are interpolated from 1, 2, or 4 neighbors of the pixel having the same color. The same logic is applied for other combinations. These are components from the second row, second and third columns, respectively. What is the simplest and fastest way to convert an RGBA image in RGB using PIL? Please check that out! In OpenCV, to convert an RGB image to HSV image, we use the cv2.cvtColor () function. As typical converting methods just remove the A channel, this can result in pixels in the RGB channels to become visible that were previously made transparent by the alpha channel. The conventional ranges for B, G, and R channel values are 0 to 255. Save my name, email, and website in this browser for the next time I comment. COLOR_BGRA2YUV_IYUVPython: cv.COLOR_BGRA2YUV_IYUV | . image_gray = image.convert ('LA') The gray scale image has two dimension i.e., two matrix (row x col x 2). Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. \[S \leftarrow \fork{\frac{V-min(R,G,B)}{V}}{if \(V \neq 0\)}{0}{otherwise}\], \[H \leftarrow \forkfour{{60(G - B)}/{(V-min(R,G,B))}}{if \(V=R\)} {{120+60(B - R)}/{(V-min(R,G,B))}}{if \(V=G\)} {{240+60(R - G)}/{(V-min(R,G,B))}}{if \(V=B\)} {0}{if \(R=G=B\)}\]. DiagonalGAN Content-Style Disentanglement in StyleGAN Explained! Well occasionally send you account related emails. You are right. C++ Programming - Beginner to Advanced; Java Programming - Beginner to Advanced; C Programming - Beginner to Advanced; Web Development. OpenCV => 4.0.0; Operating System / Platform => Manjaro Linux 64 Bit; Compiler => Python 3.7.1; Detailed description. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. How to convert RGBA image to RGB in Python? OpenCV provides the cvtColor function that allows to convert an image from one color space to another. COLOR_RGB2YUV_I420Python: cv.COLOR_RGB2YUV_I420 | RGB to YUV 4:2:0 family. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, How a top-ranked engineering school reimagined CS curriculum (Ep. On the other hand, in Pillow, the order of colors is assumed to be RGB (red, green, blue). To learn more, see our tips on writing great answers. I've upvoted Johannes' answer because he's right about that. the difference in the color format of cv2 and PIL, https://docs.opencv.org/4.x/d8/d01/group__imgproc__color__conversions.html#ga397ae87e1288a81d2363b61574eb8cab, https://pillow.readthedocs.io/en/stable/reference/Image.html, Save JPEG With Specific Quality | OpenCV vs Pillow | Python, Mirror/Flip Image | OpenCV vs Pillow | Python, Image Translation | OpenCV vs Pillow | Python, Stable Diffusion The Invisible Watermark in Generated Images. In this tutorial, I will show you how to convert RGBA images to RGB images in the simplest ways using OpenCV (cv2) and Pillow (PIL). Easiest way to convert int to string in C++. Can you still use Commanders Strike if the only attack available to forego is an attack against an ally? Solution 1. Pre-processing merge. In this tutorial, I will show you how to convert RGBA images to RGB images in the simplest ways using OpenCV (cv2) and Pillow (PIL). Canadian of Polish descent travel to Poland with Canadian passport. What does 'They're at four. calculate RGB equivalent of base colors with alpha of 0.5 over white background in matplotlib, R function for RGBA to HEX color conversion. You may use cv2.merge () to add the alpha channel to the given RGB image, but first you need to split the RGB image to R, G and B channels, as per the documentation: Python: cv2.merge (mv [, dst]) mv - input array or vector of matrices to be merged; all the matrices in mv must have the same size and the same depth. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. This outputs \(0 \leq L \leq 100\), \(-134 \leq u \leq 220\), \(-140 \leq v \leq 122\) . You can always read the image file as grayscale right from the beginning using imread from OpenCV: img = cv2.imread('messi5.jpg', 0) Furthermore, in case you want to read the image as RGB, do some processing and then convert to Gray Scale you could use cvtcolor from OpenCV: gray_image = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY) First, we will display the image as it is imported which means in BGR format. In this article, we will convert a BGR image to RGB with python and OpenCV. I thought that was as easy as setImageType(OF_IMAGE_COLOR). I have an image dataset stored as RGB images. -- | -- COLOR_RGB2YUV_I420Python: cv.COLOR_RGB2YUV_I420 | RGB to YUV 4:2:0 family. We can use cvtColor() method to convert a BGR image to RGB and vice-versa. While BGR is used consistently throughout OpenCV, most other image processing libraries use the RGB ordering. JoJoGAN Style Transfer on Faces Using StyleGAN Create JoJo Faces (with codes). You have to cvCreateImageHeader instead of cvCreateImage unsigned char* buffer; int width = 100; int height = 100; IplImage* img1 = cvCreateImageHeader(cvSize(width,height),IPL_DEPTH_8U,4); cvSetData(img1,buffer,img1->widthStep); Comments Can you tell me why? We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. If the null hypothesis is never really true, is there a point to using a statistical test without a priori power analysis? You need to add addon ofxOpenCv (use projectGenerator to import project and add addon) and add in file #include ofxOpenCv.h in the header file from class you going to use it. The hard way (method you were trying to implement): 2. Second, these are the coefficients for Rec709 or sRGB, but other colorspaces require different coefficients. I would strongly recommend you use skimage.io to load your images, not opencv. Required fields are marked *. If total energies differ across different software, how do I decide which software to use? cvtColor generates single channel image that contains full size Y plain and quater size UV interleaved for nv21. How do I convert a String to an int in Java? (For details, please see the difference in the color format of cv2 and PIL). Connect and share knowledge within a single location that is structured and easy to search. https://gist.github.com/Jim-Bar/3cbba684a71d1a9d468a6711a6eddbeb#file-yuv_formats-png. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Have a question about this project? Code for my answer given . tar command with and without --absolute-names option, Ubuntu won't accept my choice of password. Here is a convenient SASS function in accordance with Andras' and hkurabko's answers. Various color spaces such as RGB, BGR, HSV can be mutually converted using OpenCV function cvtColor(). COLOR_BGR2YUV_I420Python: cv.COLOR_BGR2YUV_I420 | (0.2126*R + 0.7152*G + 0.0722*B) .they require that the RGB channels are all linearized to remove any gamma encoding. Hi! 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. SO question link here. When code is cv2.COLOR_BGR2RGB, BGR is converted to RGB. However, in following demostration, NV21 and NV12 has interleaved V/U plane, but I420 and YV12 don't. Typically, before feeding an image to the model, most computer vision task pipelines assume similar data pre-processing steps like: image reading from the input device (camera, disk, network); color schema swapping (RGB to BGR and vice versa, or RGB to YUV); image resizing to the input size required by the model (optional); The values are then converted to the destination data type: \[L \leftarrow \frac{V_{max} + V_{min}}{2}\], \[S \leftarrow \fork { \frac{V_{max} - V_{min}}{V_{max} + V_{min}} }{if \(L < 0.5\) } { \frac{V_{max} - V_{min}}{2 - (V_{max} + V_{min})} }{if \(L \ge 0.5\) }\], \[H \leftarrow \forkfour {{60(G - B)}/{(V_{max}-V_{min})}}{if \(V_{max}=R\) } {{120+60(B - R)}/{(V_{max}-V_{min})}}{if \(V_{max}=G\) } {{240+60(R - G)}/{(V_{max}-V_{min})}}{if \(V_{max}=B\) } {0}{if \(R=G=B\) }\]. I think this answer assumes that the background color is rgb, not rgba. Accroding to RGB YCrCb JPEG (or YC. Parabolic, suborbital and ballistic trajectories all follow elliptic paths. The matplotlib.colors.to_rgba() function is used convert c(color) to an RGBA color. I am promoting my comment to an answer: The easy way is: You could draw in the original 'frame' itself instead of using gray image. Sign in Note: The resulting image is actually in BGR format instead of RGB. A more specific answer, however, incorporates the alpha value into the actual colour result based on an opaque background colour (or 'matte' as it's referred to). It opens the images in RGB format by default, removing your shuffling overhead, but if you want to convert BGR to RGB you can use this: Asking for help, clarification, or responding to other answers. COLOR_RGBA2YUV_YV12Python: cv.COLOR_RGBA2YUV_YV12 | There are several modifications of the above pattern that can be achieved by shifting the pattern one pixel left and/or one pixel up. First, while the coefficients are correct for sRGB or Rec709, to convert from color to Y. I think rearranging the algorithm to reflect this would make it a more helpful resource and better answer to the question. Is it safe to publish research papers in cooperation with Russian academics? Wikipedia and Andras Zoltan's answer is a little bit different. We can use cvtColor () method to convert a BGR image to RGB and vice-versa. rev2023.5.1.43404. alpha: It is an optional parameter that accepts a scalar. An example of data being processed may be a unique identifier stored in a cookie. It can process images and videos to identify objects, faces, or even the handwriting of a human. Why is "1000000000000000 in range(1000000000000001)" so fast in Python 3? To learn more, see our tips on writing great answers. By using our site, you The order of color is BGR (blue, green, red). This article describes the following contents. Generic Doubly-Linked-Lists C implementation. I can't find a simple method to do this, I don't need to take background into consideration. For a test scenario, convert rgba(0,0,0,.7) on background rgb(255,255,255) using both formulas; hkurabko's forumala clearly produces the correct answer. Write about AI, web dev/hack. 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. Best way to convert string to bytes in Python 3? Has the cause of a rocket failure ever been mis-identified, such that another launch failed due to the same problem? Where can I find a clear diagram of the SPECK algorithm? You probably want to use an image's convert method: import PIL.Image rgba_image = PIL.Image.open (path_to_image) rgb_image = rgba_image.convert ('RGB') Share Improve this answer Follow edited Oct 7 '19 at 6:30. I'm gaining upvotes for this answer regularly, and it's possible that some people are finding it, having to invert the algorithm themselves. Each one has one value per pixel and their ranges are identical. \[L \leftarrow \fork{116*Y^{1/3} - 16}{for \(Y>0.008856\)}{903.3 Y}{for \(Y\leq 0.008856\)}\], \[u \leftarrow 13*L*(u' - u_n) \quad \text{where} \quad u_n=0.19793943\], \[v \leftarrow 13*L*(v' - v_n) \quad \text{where} \quad v_n=0.46831096\]. This answer works with the CSS's definition of alpha. Thanks for contributing an answer to Stack Overflow! Counting and finding real solutions of an equation. Does a password policy with a restriction of repeated characters increase security? The two letters \(C_1\) and \(C_2\) in the conversion constants CV_Bayer \(C_1 C_2\) 2BGR and CV_Bayer \(C_1 C_2\) 2RGB indicate the particular pattern type. This function takes two arguments first the input image and second the color conversion method. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey, Convert RGBA to RGB taking background into consideration, Algorithm for Additive Color Mixing for RGB Values, Matplotlib Plots Lose Transparency When Saving as .ps/.eps. This can be useful if we need to pass the an image to a video encoder that expect that. \[Y \leftarrow 0.299 \cdot R + 0.587 \cdot G + 0.114 \cdot B\], \[Cr \leftarrow (R-Y) \cdot 0.713 + delta\], \[Cb \leftarrow (B-Y) \cdot 0.564 + delta\], \[R \leftarrow Y + 1.403 \cdot (Cr - delta)\], \[G \leftarrow Y - 0.714 \cdot (Cr - delta) - 0.344 \cdot (Cb - delta)\], \[B \leftarrow Y + 1.773 \cdot (Cb - delta)\], \[delta = \left \{ \begin{array}{l l} 128 & \mbox{for 8-bit images} \\ 32768 & \mbox{for 16-bit images} \\ 0.5 & \mbox{for floating-point images} \end{array} \right .\]. You can also use an if statement to check if the mode of the image is RGBA before calling the Image.convert() method. How to combine existing cvtColor to achive the conversion from BGR to NV21? This ends up being equal to @hkurabko's answer below *. Asking for help, clarification, or responding to other answers. Thanks for contributing an answer to Stack Overflow! In case of a transformation to-from RGB color space, the order of the channels should be specified explicitly (RGB or BGR). Here is some java code (works on Android API 24): Python function in accordance with hkurabko's answer. Connect and share knowledge within a single location that is structured and easy to search. What I want is to get a RGB value which is most similar to the RGBA tuple visually on white background. How to get hex color value rather than RGB value? This method simply removes the alpha channel from the RGBA images, the transparency will turn into black (or sometimes noises) in the resulting images. You can use the OpenCV function cvtColor() or simply change the order of ndarray. If total energies differ across different software, how do I decide which software to use? I agree, use this version, not @Andras Zoltan's. Note that when converting integer Luv images to RGB the intermediate X, Y and Z values are truncated to \( [0, 2] \) range to fit white point limitations. COLOR_BGR2YUV_IYUVPython: cv.COLOR_BGR2YUV_IYUV | When converted to RGB, it will be saved as a correct image even if it is saved after being converted to a PIL.Image object. Find centralized, trusted content and collaborate around the technologies you use most. \[\vecthree{X}{Y}{Z} \leftarrow \vecthreethree{0.412453}{0.357580}{0.180423}{0.212671}{0.715160}{0.072169}{0.019334}{0.119193}{0.950227} \cdot \vecthree{R}{G}{B}\], \[X \leftarrow X/X_n, \text{where} X_n = 0.950456\], \[Z \leftarrow Z/Z_n, \text{where} Z_n = 1.088754\], \[L \leftarrow \fork{116*Y^{1/3}-16}{for \(Y>0.008856\)}{903.3*Y}{for \(Y \le 0.008856\)}\], \[f(t)= \fork{t^{1/3}}{for \(t>0.008856\)}{7.787 t+16/116}{for \(t\leq 0.008856\)}\], \[delta = \fork{128}{for 8-bit images}{0}{for floating-point images}\]. You probably want to use an image's convert method: import PIL.Image rgba_image = PIL.Image.open (path_to_image) rgb_image = rgba_image.convert ('RGB') Share Improve this answer Follow edited Oct 7, 2019 at 6:30 ejuhjav 2,620 2 24 31 answered May 14, 2018 at 14:06 Noctis Skytower 21.2k 16 82 116 Add a comment 15 It may lead to incorrect representation of colors with odd XYZ values. I wrote following code can do such a task: You signed in with another tab or window. There are several ways, for example, as follows: Reading and saving image files with Python, OpenCV (imread, imwrite), OpenCV: Miscellaneous Image Transformations, Detect and read barcodes with OpenCV in Python, Detect and read QR codes with OpenCV in Python, Alpha blending and masking of images with Python, OpenCV, NumPy, Detect and read barcodes and QR codes with ZBar in Python, Get image size (width, height) with Python, OpenCV, Pillow (PIL), Concatenate images with Python, OpenCV (hconcat, vconcat, np.tile), Binarize image with Python, NumPy, OpenCV, Check OpenCV Build Information: getBuildInformation(), Get the image from the clipboard with Python, Pillow, Save still images from camera video with OpenCV in Python, Add padding to the image with Python, Pillow. What is this brick with a round back and a stud on the side used for? Add color conversion for RGB / RGBA / BGR / BGRA to NV12 / NV21. How to convert a NumPy array to PIL image applying matplotlib colormap. COLOR_BGRA2YUV_YV12Python: cv.COLOR_BGRA2YUV_YV12. Transformations within RGB space like adding/removing the alpha channel, reversing the channel order, conversion to/from 16-bit RGB color (R5:G6:B5 or R5:G5:B5), as well as conversion to/from grayscale using: and The conversion from a RGB image to gray is done with: cvtColor (src, bwsrc, cv::COLOR_RGB2GRAY); Python | OpenCV BGR color palette with trackbars, Detect the RGB color from a webcam using Python - OpenCV, OpenCV - Facial Landmarks and Face Detection using dlib and OpenCV, Create Random RGB Color Code using Python, Natural Language Processing (NLP) Tutorial, Introduction to Heap - Data Structure and Algorithm Tutorials, Introduction to Segment Trees - Data Structure and Algorithm Tutorials. privacy statement. In my case I wanted to make the RGB image look as if it was an RGBA image on a white background. https://docs.opencv.org/4.x/d8/d01/group__imgproc__color__conversions.html#ga4e0972be5de079fed4e3a10e24ef5ef0. On output \(0 \leq V \leq 1\), \(0 \leq S \leq 1\), \(0 \leq H \leq 360\) . In Javascript how can I set rgba without specifying the rgb? Or are do you want the RGB result of superimposing the RGBA over a (e.g.) 14RGBA RGBARedGreenBlueAlpha RGBRGBRGBalpha Im using opencv actually but is no recognizing the code: Did you try ofPixels methods? We'll call the result. Making statements based on opinion; back them up with references or personal experience. And each imaging library depends on their own special channel orders. So you can achieve the goal with existing cvtColor. The mode of the .png image is initially P.However, after calling Image.convert() with RGB as an argument, the mode of the stored in the rgb_im variable image is RGB. Now I need to binarize it with threshold and plot a histogram. look at the ofxCv examples how the convert ofImages and ofPixels to cv::Mat so that openCv can use them. Histogram equalization is an image processing method to adjust the contrast of an image using its intensity distribution histogram. Thanks. We also share information about your use of our site with our social media, advertising and analytics partners. Y, Cr, and Cb cover the whole value range. PillowImageRGBRGBA ```python from PIL import Image # img = Image.open('example.jpg') # RGBA img_rgba = img.convert('RGBA') # img_rgba.save('example_rgba.png') ``` 'example.jpg''example_rgba.png' In case of 8-bit and 16-bit images, R, G, and B are converted to the floating-point format and scaled to fit the 0 to 1 range. So, when we read an image using cv2.imread () it interprets in BGR format by default. COLOR_BGR2YUV_I420Python: cv.COLOR_BGR2YUV_I420 | COLOR_RGB2YUV_IYUVPython: cv.COLOR_RGB2YUV_IYUV | COLOR_BGR2YUV_IYUVPython: cv.COLOR_BGR2YUV_IYUV | COLOR_RGBA2YUV_I420Python: cv.COLOR_RGBA2YUV_I420 | COLOR_BGRA2YUV_I420Python: cv.COLOR_BGRA2YUV_I420 | COLOR_RGBA2YUV_IYUVPython: cv.COLOR_RGBA2YUV_IYUV | COLOR_BGRA2YUV_IYUVPython: cv.COLOR_BGRA2YUV_IYUV | COLOR_RGB2YUV_YV12Python: cv.COLOR_RGB2YUV_YV12 | COLOR_BGR2YUV_YV12Python: cv.COLOR_BGR2YUV_YV12 | COLOR_RGBA2YUV_YV12Python: cv.COLOR_RGBA2YUV_YV12 | COLOR_BGRA2YUV_YV12Python: cv.COLOR_BGRA2YUV_YV12. Is there a generic term for these trajectories? If the RGBA is in pre-multiplied color-space and is semi-transparent, you need to divide out alpha to get the correct RGB color. Through the adjustments of the contrast values of the image, the intensity . System information (version) OpenCV => 4.2.0 Operating System / Platform => Windows 64 Bit 2004 Compiler => None Detailed description I have a problem when I convert the color space from RGB to YCrCb. 6 comments Contributor danopdev commented on Sep 14, 2022 OpenCV => 4.x OpenCV uses BGR image format. 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Do you just want to remove the alpha channel? By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. The output is a numpy array with 3 channels of type uint8. 100 Python . This function accepts color conversion code. Why did DOS-based Windows require HIMEM.SYS to boot? RGBA to RGB conversion. Reading Graduated Cylinders for a non-transparent liquid, Normalise the RGBA values so that they're all between 0 and 1 - just divide each value by 255 to do this. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. In the YIQ space, the Y coordinate is between 0 and 1, but the . Matplotlib is a multi-platform data visualization library built on NumPy arrays and designed to work with the broader SciPy stack. But with the given algorithm, it would be fully transparent black. Find secure code to use in your application or website. Already on GitHub? Therefore, if the ndarray of the image read by OpenCV imread() is converted to a PIL.Image object and saved, the image with the wrong color is saved. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Also it is ready to be used as a javacript function. The function converts an input image from BGR color space to RGB. Which was the first Sci-Fi story to predict obnoxious "robo calls"? There are conversions from NV12 / NV21 to RGB / RGBA / BGR / BGRA / GRAY but not the reverse. Where can I find a clear diagram of the SPECK algorithm? A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. jsbin.com/qocixeh/edit?html,js,console,output, gist.github.com/vladimirbrasil/bd139851ff757a1c8cb46fac93e733eb, How a top-ranked engineering school reimagined CS curriculum (Ep. You dont need opencv for that operation only. How to convert a RGBA color likergba(0, 0, 0, 0.86)to a RGB hex value that takes the alpha component into account? Python image = cv2.imread("C:\\AiHints\\lab_image.jpg") COLOR_RGB2YUV_YV12Python: cv.COLOR_RGB2YUV_YV12 | . You need to just follow these steps: Step 1: Install OpenCV If OpenCV is not installed, then first install it using this code. @BryanRayner have added some edits to my answer. I used BGColor as white, because I just do not understand the matte concept (sorry!).