Python OpenCV Color Detection Example

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In this Python OpenCV video i want to show you Python OpenCV Color Detection.

How does color work on a computer?
So we represent colors on a computers by color-space or color models which basically describes range of colors as tuples of numbers.

Instead of going for each color, we’ll discuss most common color-space we use .i.e. RGB(Red, Green, Blue) and HSV (Hue, Saturation, Value).

RGB basically describes color as a tuple of three components. Each component can take a value between 0 and 255, where the tuple (0, 0, 0) represents black and (255, 255, 255) represents white. For example, if we were to show a pure blue pixel on-screen, then the R value would be 0, the G value would be 0, and the B value would be 255.

Source code:

[MaxMustermann-eysc]

Short, simple and easy to understand. You nailed it!

[abdurrazzak]

Short, simple and easy to understand.

[padmavathynarasareddygari]

Ok, so we can recognize the colors using this code but what if we want to recognize a color and draw a line on it where ever the color is there?(if that made sense) Can someone help?

[lucasknorr]

How can I calculate the area of the white parts in the mask?

[VishalChauhan-wgud]

how you calculate the range for specific color?

[chimpspecialist]

Where did you get the upper and lower range for blue @4:12?

[angeldiazmejia]

Great video you help me a loot but how i can show the original color instead of the white one? Thanks in advance

[andinursechfudin]

how to segment colors other than green yellow blue ?

[tharinduheshan]

Is it possible to use python using a point cloud to extract only the road from the colors on both sides of the road (if there is a plantation like grass)?

[nikhildevadas]

Nice presentation..i want to know one thing.How can i understand uperlimit and lower limit of specific color?

[MegaKevin]

How do you choose you upper and lower ranges?

[adilmulla]

how to draw lines conneting to the contours from center of image plz help

[mahmoudodehodeh]

Hello, I have images of wheels and I need to know the color of the wheel from the image, for example, if an image contains a black wheel I need to know that the color is black and I only need to these colors to be detected Black, Gray, Silver, White, Bronze, Blue, Red, Green, how can i achieve that?

[lauram.]

Is it possible for the cv2 library to determine if the color was actually found or not? How do we do that?

[dyaa_unison]

how could i do the same in live video. or track the x and y of a color

[siddharthaupase]

Hey can I get the number of dots of a specific color?

[owentheoutlaw_]

Instead of targeting a specific image how can I read my desktop screen and then detect colors on my desktop?

[lizmccord]

Please kindly share how to install opencv?

[sandeepvytla]

What is a mask ? Why is it necessary to create it ?

[dharmilparekh]

whats the meaning of lower range and upper range, mask???