* image of a gray wall (using bicubic interpolation for visual quality)
* as captured by the sensor gives:</p>
* <p><img alt="Image of a uniform white wall (inverse shading map)" src="../images/camera2/metadata/android.statistics.lensShadingMap/inv_shading.png" /></p>
* <p>For a MONOCHROME camera, all of the 2x2 channels must have the same values. An example
* shading map for such a camera is defined as:</p>