Image Segmentation openCV python but for videos












0















I'm learning that page https://realpython.com/python-opencv-color-spaces/. I want to select the color lime in an image and I want to see it first.



I saw in https://www.rapidtables.com/convert/color/rgb-to-hsv.html that lime is (120,100,100) in HSV.



So I wrote :



green = (120, 100, 100)

g_square = np.full((10, 10, 3), green, dtype=np.uint8) / 255.0

plt.imshow(hsv_to_rgb(g_square))

plt.show()


My issue is that I don't have lime displayed but rather a dark green...






python numpy opencv colors hsv







share|improve this question


















  • 1





    Opencv follows BGR convention by default, and the imshow would display the images assuming BGR convention, so try to convert your matrix in the BGR format before using imshow()

    – ZdaR
    Dec 31 '18 at 12:35






  • 1





    Note that openCV uses other value ranges than the website you mentioned. openCV uses HSV - [0-179][0-255][0-255]. Read it here

    – J.D.
    Dec 31 '18 at 14:58


















0















I'm learning that page https://realpython.com/python-opencv-color-spaces/. I want to select the color lime in an image and I want to see it first.



I saw in https://www.rapidtables.com/convert/color/rgb-to-hsv.html that lime is (120,100,100) in HSV.



So I wrote :



green = (120, 100, 100)

g_square = np.full((10, 10, 3), green, dtype=np.uint8) / 255.0

plt.imshow(hsv_to_rgb(g_square))

plt.show()


My issue is that I don't have lime displayed but rather a dark green...






python numpy opencv colors hsv







share|improve this question


















  • 1





    Opencv follows BGR convention by default, and the imshow would display the images assuming BGR convention, so try to convert your matrix in the BGR format before using imshow()

    – ZdaR
    Dec 31 '18 at 12:35






  • 1





    Note that openCV uses other value ranges than the website you mentioned. openCV uses HSV - [0-179][0-255][0-255]. Read it here

    – J.D.
    Dec 31 '18 at 14:58
















0












0








0








I'm learning that page https://realpython.com/python-opencv-color-spaces/. I want to select the color lime in an image and I want to see it first.



I saw in https://www.rapidtables.com/convert/color/rgb-to-hsv.html that lime is (120,100,100) in HSV.



So I wrote :



green = (120, 100, 100)

g_square = np.full((10, 10, 3), green, dtype=np.uint8) / 255.0

plt.imshow(hsv_to_rgb(g_square))

plt.show()


My issue is that I don't have lime displayed but rather a dark green...






python numpy opencv colors hsv







share|improve this question














I'm learning that page https://realpython.com/python-opencv-color-spaces/. I want to select the color lime in an image and I want to see it first.



I saw in https://www.rapidtables.com/convert/color/rgb-to-hsv.html that lime is (120,100,100) in HSV.



So I wrote :



green = (120, 100, 100)

g_square = np.full((10, 10, 3), green, dtype=np.uint8) / 255.0

plt.imshow(hsv_to_rgb(g_square))

plt.show()


My issue is that I don't have lime displayed but rather a dark green...






python numpy opencv colors hsv




python numpy opencv colors hsv






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Dec 31 '18 at 12:32









J.AJ.A

1275




1275








  • 1





    Opencv follows BGR convention by default, and the imshow would display the images assuming BGR convention, so try to convert your matrix in the BGR format before using imshow()

    – ZdaR
    Dec 31 '18 at 12:35






  • 1





    Note that openCV uses other value ranges than the website you mentioned. openCV uses HSV - [0-179][0-255][0-255]. Read it here

    – J.D.
    Dec 31 '18 at 14:58
















  • 1





    Opencv follows BGR convention by default, and the imshow would display the images assuming BGR convention, so try to convert your matrix in the BGR format before using imshow()

    – ZdaR
    Dec 31 '18 at 12:35






  • 1





    Note that openCV uses other value ranges than the website you mentioned. openCV uses HSV - [0-179][0-255][0-255]. Read it here

    – J.D.
    Dec 31 '18 at 14:58










1




1





Opencv follows BGR convention by default, and the imshow would display the images assuming BGR convention, so try to convert your matrix in the BGR format before using imshow()

– ZdaR
Dec 31 '18 at 12:35





Opencv follows BGR convention by default, and the imshow would display the images assuming BGR convention, so try to convert your matrix in the BGR format before using imshow()

– ZdaR
Dec 31 '18 at 12:35




1




1





Note that openCV uses other value ranges than the website you mentioned. openCV uses HSV - [0-179][0-255][0-255]. Read it here

– J.D.
Dec 31 '18 at 14:58







Note that openCV uses other value ranges than the website you mentioned. openCV uses HSV - [0-179][0-255][0-255]. Read it here

– J.D.
Dec 31 '18 at 14:58














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