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I am a beginner in image processing. I started with opencv . Now there is a fundamental confusion to me . One is thresholding and one is image transformation . I am confused in these two parts.Till now i have understood couple of things: 1. Input image has to converted into Grayscale. 2. After that have to remove noise. 2.1 Now to remove noise what should i use thresholding or DFT techniques, when i read , both of them are used to remove noises.

Is my understanding right? Please guide me .

Thanks

user3174410
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  • What is your desired output? What will come next after noise removal? – Václav Struhár Aug 30 '17 at 11:57
  • I have just started stuck in the concepts . – user3174410 Aug 30 '17 at 11:59
  • Well you can do a lot of work on an image and the noise filtering solution will depend o the image. Moreover, you can also do threshold-like in color space. For instance, you can convert to HSV color space, and then apply a mask that will take HSV_lower_boundaries and HSV_Higher_boudaries to apply a threshold. So even the Grayscale conversion isn't an obligation. It depends of what you want to do. – Mathieu Aug 30 '17 at 12:11
  • i have form image , trying to extract text out of it .So not able to go the next step after filteration and noise reduction . – user3174410 Aug 30 '17 at 12:18

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