Converts an array to another data type with optional scaling

dst = cv.convertTo(src)
dst = cv.convertTo(src, 'OptionName', optionValue, ...)

Input

• src Input matrix.

Output

• dst Output image of the same size as src, and the specified type.

Options

• RType desired output matrix type (uint8, int32, double, etc.), or rather the depth since the number of channels are the same as the input has; if it is negative, the output matrix will have the same type as the input. Default -1
• Alpha optional scale factor. default 1.0
• Beta optional delta added to the scaled values. default 0.0

The method converts source pixel values to the target data type. Saturation is applied at the end to avoid possible overflows:

dst = cast(src*alpha + beta, RType);