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Capturing image 1920x1080 with 15mp using OpenCV


Im studying OpenCV using a webcam C920. This webcam has resolution 1920x1080. In webcam specifications says that C920 can capture imagens with 15mp. Using OpenCV to capture images, a picture has 2mp. Using Logitech application a picture has 15MP.

My doubts:

  • How its possible capture images with 15mp with resolution 1920x1080? Is the image enlarged?

  • Is it possible capture images with 15mp using OpenCV?

Images enlarged:

Using OpenCV Image captured using OpenCV

Using Logitech application Image captured using Logitech application


Solution

  • https://support.logitech.com/en_us/product/hd-pro-webcam-c920/specs

    Optical Resolution True:3MP Software Enhanced:15MP

    i'm guessing the software is up scaling the image and performing some kind of interpolation between the pixels.