Merge "Camera2 NDK: Update lensShadingMap documentation, remove duplicate" into nyc-dev

     * camera device, and an identity lens shading map data will be provided

     * if <code>ACAMERA_STATISTICS_LENS_SHADING_MAP_MODE == ON</code>. For example, for lens

     * shading map with size of <code>[ 4, 3 ]</code>,

     * the output ACAMERA_STATISTICS_LENS_SHADING_CORRECTION_MAP for this case will be an identity

     * the output android.statistics.lensShadingCorrectionMap for this case will be an identity

     * map shown below:</p>

     * <pre><code>[ 1.0, 1.0, 1.0, 1.0,  1.0, 1.0, 1.0, 1.0,

     *  1.0, 1.0, 1.0, 1.0,  1.0, 1.0, 1.0, 1.0,

     * <p>When set to other modes, lens shading correction will be applied by the camera

     * device. Applications can request lens shading map data by setting

     * ACAMERA_STATISTICS_LENS_SHADING_MAP_MODE to ON, and then the camera device will provide lens

     * shading map data in ACAMERA_STATISTICS_LENS_SHADING_CORRECTION_MAP; the returned shading map

     * shading map data in android.statistics.lensShadingCorrectionMap; the returned shading map

     * data will be the one applied by the camera device for this capture request.</p>

     * <p>The shading map data may depend on the auto-exposure (AE) and AWB statistics, therefore

     * the reliability of the map data may be affected by the AE and AWB algorithms. When AE and

     *

     * @see ACAMERA_CONTROL_AE_MODE

     * @see ACAMERA_CONTROL_AWB_MODE

     * @see ACAMERA_STATISTICS_LENS_SHADING_CORRECTION_MAP

     * @see ACAMERA_STATISTICS_LENS_SHADING_MAP_MODE

     */

    ACAMERA_SHADING_MODE =                                      // byte (enum)

     */

    ACAMERA_STATISTICS_FACE_SCORES =                            // byte[n]

            ACAMERA_STATISTICS_START + 7,

    /**

     * <p>The shading map is a low-resolution floating-point map

     * that lists the coefficients used to correct for vignetting, for each

     * Bayer color channel.</p>

     *

     * <p>This tag may appear in:</p>

     * <ul>

     *   <li>ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks</li>

     * </ul>

     *

     * <p>The least shaded section of the image should have a gain factor

     * of 1; all other sections should have gains above 1.</p>

     * <p>When ACAMERA_COLOR_CORRECTION_MODE = TRANSFORM_MATRIX, the map

     * must take into account the colorCorrection settings.</p>

     * <p>The shading map is for the entire active pixel array, and is not

     * affected by the crop region specified in the request. Each shading map

     * entry is the value of the shading compensation map over a specific

     * pixel on the sensor.  Specifically, with a (N x M) resolution shading

     * map, and an active pixel array size (W x H), shading map entry

     * (x,y) ϵ (0 ... N-1, 0 ... M-1) is the value of the shading map at

     * pixel ( ((W-1)/(N-1)) * x, ((H-1)/(M-1)) * y) for the four color channels.

     * The map is assumed to be bilinearly interpolated between the sample points.</p>

     * <p>The channel order is [R, Geven, Godd, B], where Geven is the green

     * channel for the even rows of a Bayer pattern, and Godd is the odd rows.

     * The shading map is stored in a fully interleaved format.</p>

     * <p>The shading map should have on the order of 30-40 rows and columns,

     * and must be smaller than 64x64.</p>

     * <p>As an example, given a very small map defined as:</p>

     * <pre><code>width,height = [ 4, 3 ]

     * values =

     * [ 1.3, 1.2, 1.15, 1.2,  1.2, 1.2, 1.15, 1.2,

     *     1.1, 1.2, 1.2, 1.2,  1.3, 1.2, 1.3, 1.3,

     *   1.2, 1.2, 1.25, 1.1,  1.1, 1.1, 1.1, 1.0,

     *     1.0, 1.0, 1.0, 1.0,  1.2, 1.3, 1.25, 1.2,

     *   1.3, 1.2, 1.2, 1.3,   1.2, 1.15, 1.1, 1.2,

     *     1.2, 1.1, 1.0, 1.2,  1.3, 1.15, 1.2, 1.3 ]

     * </code></pre>

     * <p>The low-resolution scaling map images for each channel are

     * (displayed using nearest-neighbor interpolation):</p>

     * <p><img alt="Red lens shading map" src="../images/camera2/metadata/android.statistics.lensShadingMap/red_shading.png" />

     * <img alt="Green (even rows) lens shading map" src="../images/camera2/metadata/android.statistics.lensShadingMap/green_e_shading.png" />

     * <img alt="Green (odd rows) lens shading map" src="../images/camera2/metadata/android.statistics.lensShadingMap/green_o_shading.png" />

     * <img alt="Blue lens shading map" src="../images/camera2/metadata/android.statistics.lensShadingMap/blue_shading.png" /></p>

     * <p>As a visualization only, inverting the full-color map to recover an

     * 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>

     *

     * @see ACAMERA_COLOR_CORRECTION_MODE

     */

    ACAMERA_STATISTICS_LENS_SHADING_CORRECTION_MAP =            // byte

            ACAMERA_STATISTICS_START + 10,

    /**

     * <p>The shading map is a low-resolution floating-point map

     * that lists the coefficients used to correct for vignetting and color shading,

     *   <li>ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks</li>

     * </ul>

     *

     * <p>The lens shading correction is defined as a full shading correction that

     * corrects both color shading for the output non-RAW images. After the

     * shading map is applied, the output non-RAW images will be flat-field images

     * for flat scenes under uniform illumination.</p>

     * <p>When there is no lens shading correction applied to RAW output images

     * (ACAMERA_SENSOR_INFO_LENS_SHADING_APPLIED <code>==</code> false), this map is a full lens

     * shading correction map; when there is some lens shading correction applied

     * to the RAW output image (ACAMERA_SENSOR_INFO_LENS_SHADING_APPLIED <code>==</code> true),

     * this map reports the remaining lens shading correction map that needs to be

     * applied to get fully shading corrected images.</p>

     * <p>For a full shading correction map, the least shaded section of the image

     * should have a gain factor of 1; all other sections should have gains above 1.</p>

     * <p>The map provided here is the same map that is used by the camera device to

     * correct both color shading and vignetting for output non-RAW images.</p>

     * <p>When there is no lens shading correction applied to RAW

     * output images (ACAMERA_SENSOR_INFO_LENS_SHADING_APPLIED <code>==</code>

     * false), this map is the complete lens shading correction

     * map; when there is some lens shading correction applied to

     * the RAW output image (ACAMERA_SENSOR_INFO_LENS_SHADING_APPLIED<code>==</code> true), this map reports the remaining lens shading

     * correction map that needs to be applied to get shading

     * corrected images that match the camera device's output for

     * non-RAW formats.</p>

     * <p>For a complete shading correction map, the least shaded

     * section of the image will have a gain factor of 1; all

     * other sections will have gains above 1.</p>

     * <p>When ACAMERA_COLOR_CORRECTION_MODE = TRANSFORM_MATRIX, the map

     * must take into account the colorCorrection settings.</p>

     * will take into account the colorCorrection settings.</p>

     * <p>The shading map is for the entire active pixel array, and is not

     * affected by the crop region specified in the request. Each shading map

     * entry is the value of the shading compensation map over a specific

     * channel for the even rows of a Bayer pattern, and Godd is the odd rows.

     * The shading map is stored in a fully interleaved format, and its size

     * is provided in the camera static metadata by ACAMERA_LENS_INFO_SHADING_MAP_SIZE.</p>

     * <p>The shading map should have on the order of 30-40 rows and columns,

     * and must be smaller than 64x64.</p>

     * <p>The shading map will generally have on the order of 30-40 rows and columns,

     * and will be smaller than 64x64.</p>

     * <p>As an example, given a very small map defined as:</p>

     * <pre><code>ACAMERA_LENS_INFO_SHADING_MAP_SIZE = [ 4, 3 ]

     * ACAMERA_STATISTICS_LENS_SHADING_MAP =