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If you mean cumulate 30 images (at 30 fps) is like take a photo with 1s time exposure that's false. Problem is relative to noise. When you take a picture with 1s time exposure contrast and brightness are changed before CCD matrrix Analogic digital converter like. With classical webcam you can this value but range is too small. When sensor get 0 you can cumulate it makes always 0

But when you cumulate you reduce noise and hence have thing like an enhance image like in this video

If you want to improve computation should be done with float

If you mean cumulate 30 images (at 30 fps) is like take a photo with 1s time exposure that's false. Problem is relative to noise. When you take a picture with 1s time exposure contrast and brightness are changed before CCD matrrix Analogic digital converter like. With classical webcam you can this value but range is too small. When sensor get 0 you can cumulate it makes always 0

But when you cumulate you reduce noise and hence have thing like an enhance image like in this video. when mean mode is checked it means that a butterworth filter is computed

If you want to improve computation should be done with float

If you mean cumulate 30 images (at 30 fps) is like take a photo with 1s time exposure that's false. Problem is relative to noise. When you take a picture with 1s time exposure contrast and brightness are changed before CCD matrrix Analogic digital converter like. With classical webcam you can this value but range is too small. When sensor get 0 you can cumulate it makes always 0

But when you cumulate you reduce noise and hence have thing like an enhance image like in this video. when mean mode is checked it means that a butterworth filter is computedcomputed. Curve on right is pixel value along black line. It is noisy but when filter is applied noise is reduced

If you want to improve computation should be done with float