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OpenCV - Identifying particular object in image using Java

I'm developing an opencv application in java where I need to detect the different marks on the product.I have attached the input image below In that image I need to identify the non veg mark.

Since i'm new to it, I need help to know which concepts can be used for it. I need to identify these marks on the input images

Solution

  • After quite a struggle I was able to come up with a rough solution.

    First, I separated the veg and non-veg labels.

    enter image description here & enter image description here

    Now in order to get the perfect fit of the non-veg label over the image I resized it to a particular level:

    small = cv2.resize(nveg, (0,0), fx=0.12, fy=0.12)

    enter image description here

    Now I performed Template matching as I stated in the comments' section. To learn more about this topic VISIT THIS PAGE.

    Using it I obtained the 'maximum probable location' of the non-veg label in the image. 

    res = cv2.matchTemplate(food, small, cv2.TM_CCOEFF_NORMED)
min_val, max_val, min_loc, max_loc = cv2.minMaxLoc(res)

    In the following image pay attention to the bright spot in the position of the non-veg mark:

    enter image description here

    Now using the max_loc variable, I added the tuple values to the size of the resized non-veg label and framed it with a rectangle as in the following:

    enter image description here

    You can see the black spot on the non-veg mark when I labelled it using max_loc:

    enter image description here

    Hope this helped. :)