1. Cv2 Rgb To Gray Color Chart
2. Opencv Rgb To Gray
3. Opencv Grayscale To Rgb
4. Python Color Image To Grayscale
5. Cv2 Rgb To Gray Converter

Hello,

“opencv rgb to gray custom” Code Answer’s. Bgr2gray opencv. Whatever by Hilarious Hamerkop on Apr 30 2020 Donate. Cv2 turn rgb image to grayscale. And as you see, the conversion back to color is only adding the gray scale value to the 3 channels of colors RGB. Why do we lose information? The key to understand is that a color image has three channels for each pixel, while a gray scale image only has one channel.

I have a grayscale image (CV_8UC1) and I use findContours to identify contours. These contours I would like to draw colored into the grayscale image.

I tried to merge two empty Mats(CV_8UC1) together with the grayscale image and this works not really well. So I have my wished colors, but the original image is blue, red or green depending on the merged channel position.

How can I achieve the grayscale image staying gray with having colored contoures on top?

Thank you very much :-)

Convert RGB to gray / other color spaces

Parameters:	src – input image: 8-bit unsigned, 16-bit unsigned ( CV_16UC... ), or single-precision floating-point. dst – output image of the same size and depth as src. code – color space conversion code (see the description below). dstCn – number of channels in the destination image; if the parameter is 0, the number of the channels is derived automatically from src and code .

This function converts one image from one colorspace to another.The default color format in openCV is RGB.But is is actually BGR(byte reversed).so in an 24 bit color image the first 8 bits are blue components,2nd byte is green and third one is red.

Cv2 Rgb To Gray Color Chart

• 0 to 255 for CV_8U images
• 0 to 65535 for CV_16U images
• 0 to 1 for CV_32F images

Example:

Opencv Rgb To Gray

Steps:

1. Load an image
2. Convert to gray scale
3. Show result

Opencv Grayscale To Rgb

Python Color Image To Grayscale

Cv2 Rgb To Gray Converter