public SDVariable adjustContrast(String name, SDVariable in, double factor) {
    SDValidation.validateNumerical("adjustContrast", "in", in);
    SDVariable out =  new org.nd4j.linalg.api.ops.custom.AdjustContrast(sd,in, factor).outputVariable();
    return sd.updateVariableNameAndReference(out, name);
  }