Page 264 - AI Ver 1.0 Class 10
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print(“Blue colour code at this pixel :”,blue)

                     print(“Green colour code at this pixel :”,green)
                     print(“Red colour code at this pixel :”,red)
                                                                                            th
                                                                                                        th
                      It will display the Blue, Green, Red colour code between 0 to 255 pixel at 25  row and 40  column of an
                                   rd
                     image using 3  parameter as 0,1,2.
              Let us now see how the above discussed functions will affect the code of displaying an image:






























              Cropping an Image
              Sometimes we need to remove the unwanted parts of the image to make it appear in a frame and help us focus
              on certain areas of the image. This can be done by cropping an image.
              In OpenCV we first need to draw a bounding box around a certain area known as ‘region of interest (ROI)’. After
              this we will extract the image of that ROI only which will help us to create a cropped image.

              roi = img[20:230,120:372] #img[range of y, range of x]
                 •  Let us now try this in getting the face of the dog:






























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