@ -2312,7 +2312,9 @@ typedef enum acamera_metadata_tag {
* < p > If this device is the largest or only camera device with a given facing , then this
* position will be < code > ( 0 , 0 , 0 ) < / code > ; a camera device with a lens optical center located 3 cm
* from the main sensor along the + X axis ( to the right from the user ' s perspective ) will
* report < code > ( 0.03 , 0 , 0 ) < / code > . < / p >
* report < code > ( 0.03 , 0 , 0 ) < / code > . Note that this means that , for many computer vision
* applications , the position needs to be negated to convert it to a translation from the
* camera to the origin . < / p >
* < p > To transform a pixel coordinates between two cameras facing the same direction , first
* the source camera ACAMERA_LENS_DISTORTION must be corrected for . Then the source
* camera ACAMERA_LENS_INTRINSIC_CALIBRATION needs to be applied , followed by the
@ -2324,7 +2326,8 @@ typedef enum acamera_metadata_tag {
* < p > To compare this against a real image from the destination camera , the destination camera
* image then needs to be corrected for radial distortion before comparison or sampling . < / p >
* < p > When ACAMERA_LENS_POSE_REFERENCE is GYROSCOPE , then this position is relative to
* the center of the primary gyroscope on the device . < / p >
* the center of the primary gyroscope on the device . The axis definitions are the same as
* with PRIMARY_CAMERA . < / p >
*
* @ see ACAMERA_LENS_DISTORTION
* @ see ACAMERA_LENS_INTRINSIC_CALIBRATION
@ -2418,13 +2421,15 @@ typedef enum acamera_metadata_tag {
* < / code > < / pre >
* < p > which can then be combined with the camera pose rotation
* < code > R < / code > and translation < code > t < / code > ( ACAMERA_LENS_POSE_ROTATION and
* ACAMERA_LENS_POSE_TRANSLATION , respective ) to calculate the
* ACAMERA_LENS_POSE_TRANSLATION , respective ly ) to calculate the
* complete transform from world coordinates to pixel
* coordinates : < / p >
* < pre > < code > P = [ K 0 * [ R
* 0 1 ] 0 1 ]
* < pre > < code > P = [ K 0 * [ R - R t
* 0 1 ] 0 1 ]
* < / code > < / pre >
* < p > and with < code > p_w < / code > being a point in the world coordinate system
* < p > ( Note the negation of poseTranslation when mapping from camera
* to world coordinates , and multiplication by the rotation ) . < / p >
* < p > With < code > p_w < / code > being a point in the world coordinate system
* and < code > p_s < / code > being a point in the camera active pixel array
* coordinate system , and with the mapping including the
* homogeneous division by z : < / p >
@ -2446,6 +2451,13 @@ typedef enum acamera_metadata_tag {
* activeArraySize rectangle ) , to determine the final pixel
* coordinate of the world point for processed ( non - RAW )
* output buffers . < / p >
* < p > For camera devices , the center of pixel < code > ( x , y ) < / code > is located at
* coordinate < code > ( x + 0.5 , y + 0.5 ) < / code > . So on a device with a
* precorrection active array of size < code > ( 10 , 10 ) < / code > , the valid pixel
* indices go from < code > ( 0 , 0 ) - ( 9 , 9 ) < / code > , and an perfectly - built camera would
* have an optical center at the exact center of the pixel grid , at
* coordinates < code > ( 5.0 , 5.0 ) < / code > , which is the top - left corner of pixel
* < code > ( 5 , 5 ) < / code > . < / p >
*
* @ see ACAMERA_LENS_DISTORTION
* @ see ACAMERA_LENS_POSE_ROTATION
@ -3059,7 +3071,7 @@ typedef enum acamera_metadata_tag {
* outputs will crop horizontally ( pillarbox ) , and 16 : 9
* streams will match exactly . These additional crops will
* be centered within the crop region . < / p >
* < p > If the coordinate system is android. sensor . info . activeArraysSize , the width and height
* < p > If the coordinate system is ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE , the width and height
* of the crop region cannot be set to be smaller than
* < code > floor ( activeArraySize . width / ACAMERA_SCALER_AVAILABLE_MAX_DIGITAL_ZOOM ) < / code > and
* < code > floor ( activeArraySize . height / ACAMERA_SCALER_AVAILABLE_MAX_DIGITAL_ZOOM ) < / code > , respectively . < / p >
@ -4675,8 +4687,8 @@ typedef enum acamera_metadata_tag {
ACAMERA_STATISTICS_LENS_SHADING_MAP_MODE = // byte (acamera_metadata_enum_android_statistics_lens_shading_map_mode_t)
ACAMERA_STATISTICS_START + 16 ,
/**
* < p > A control for selecting whether OIS position information is included in output
* metadata . < / p >
* < p > A control for selecting whether optical stabilization ( OIS ) position
* information is included in output result metadata . < / p >
*
* < p > Type : byte ( acamera_metadata_enum_android_statistics_ois_data_mode_t ) < / p >
*
@ -4686,6 +4698,12 @@ typedef enum acamera_metadata_tag {
* < li > ACaptureRequest < / li >
* < / ul > < / p >
*
* < p > Since optical image stabilization generally involves motion much faster than the duration
* of individualq image exposure , multiple OIS samples can be included for a single capture
* result . For example , if the OIS reporting operates at 200 Hz , a typical camera operating
* at 30f ps may have 6 - 7 OIS samples per capture result . This information can be combined
* with the rolling shutter skew to account for lens motion during image exposure in
* post - processing algorithms . < / p >
*/
ACAMERA_STATISTICS_OIS_DATA_MODE = // byte (acamera_metadata_enum_android_statistics_ois_data_mode_t)
ACAMERA_STATISTICS_START + 17 ,
@ -4717,11 +4735,15 @@ typedef enum acamera_metadata_tag {
* < / ul > < / p >
*
* < p > The array contains the amount of shifts in x direction , in pixels , based on OIS samples .
* A positive value is a shift from left to right in active array coordinate system . For
* , if the optical center is ( 1000 , 500 ) in active array coordinates , a shift of
* ( 3 , 0 ) puts the new optical center at ( 1003 , 500 ) . < / p >
* A positive value is a shift from left to right in the pre - correction active array
* coordinate system . For example, if the optical center is ( 1000 , 500 ) in pre- correction
* active array coordinates , a shift of ( 3 , 0 ) puts the new optical center at ( 1003 , 500 ) . < / p >
* < p > The number of shifts must match the number of timestamps in
* ACAMERA_STATISTICS_OIS_TIMESTAMPS . < / p >
* < p > The OIS samples are not affected by whether lens distortion correction is enabled ( on
* supporting devices ) . They are always reported in pre - correction active array coordinates ,
* since the scaling of OIS shifts would depend on the specific spot on the sensor the shift
* is needed . < / p >
*
* @ see ACAMERA_STATISTICS_OIS_TIMESTAMPS
*/
@ -4738,11 +4760,15 @@ typedef enum acamera_metadata_tag {
* < / ul > < / p >
*
* < p > The array contains the amount of shifts in y direction , in pixels , based on OIS samples .
* A positive value is a shift from top to bottom in array coordinate system . For
* , if the optical center is ( 1000 , 500 ) in active array coordinates , a shift of
* ( 0 , 5 ) puts the new optical center at ( 1000 , 505 ) . < / p >
* A positive value is a shift from top to bottom in pre- correction active array coordinate
* system. For example, if the optical center is ( 1000 , 500 ) in active array coordinates , a
* shift of ( 0 , 5 ) puts the new optical center at ( 1000 , 505 ) . < / p >
* < p > The number of shifts must match the number of timestamps in
* ACAMERA_STATISTICS_OIS_TIMESTAMPS . < / p >
* < p > The OIS samples are not affected by whether lens distortion correction is enabled ( on
* supporting devices ) . They are always reported in pre - correction active array coordinates ,
* since the scaling of OIS shifts would depend on the specific spot on the sensor the shift
* is needed . < / p >
*
* @ see ACAMERA_STATISTICS_OIS_TIMESTAMPS
*/
@ -5432,16 +5458,34 @@ typedef enum acamera_metadata_tag {
* any correction at all would slow down capture rate . Every output stream will have a
* similar amount of enhancement applied . < / p >
* < p > The correction only applies to processed outputs such as YUV , JPEG , or DEPTH16 ; it is not
* applied to any RAW output . Metadata coordinates such as face rectangles or metering
* regions are also not affected by correction . < / p >
* applied to any RAW output . < / p >
* < p > This control will be on by default on devices that support this control . Applications
* disabling distortion correction need to pay extra attention with the coordinate system of
* metering regions , crop region , and face rectangles . When distortion correction is OFF ,
* metadata coordinates follow the coordinate system of
* ACAMERA_SENSOR_INFO_PRE_CORRECTION_ACTIVE_ARRAY_SIZE . When distortion is not OFF , metadata
* coordinates follow the coordinate system of ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE . < / p >
* coordinates follow the coordinate system of ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE . The
* camera device will map these metadata fields to match the corrected image produced by the
* camera device , for both capture requests and results . However , this mapping is not very
* precise , since rectangles do not generally map to rectangles when corrected . Only linear
* scaling between the active array and precorrection active array coordinates is
* performed . Applications that require precise correction of metadata need to undo that
* linear scaling , and apply a more complete correction that takes into the account the app ' s
* own requirements . < / p >
* < p > The full list of metadata that is affected in this way by distortion correction is : < / p >
* < ul >
* < li > ACAMERA_CONTROL_AF_REGIONS < / li >
* < li > ACAMERA_CONTROL_AE_REGIONS < / li >
* < li > ACAMERA_CONTROL_AWB_REGIONS < / li >
* < li > ACAMERA_SCALER_CROP_REGION < / li >
* < li > android . statistics . faces < / li >
* < / ul >
*
* @ see ACAMERA_CONTROL_AE_REGIONS
* @ see ACAMERA_CONTROL_AF_REGIONS
* @ see ACAMERA_CONTROL_AWB_REGIONS
* @ see ACAMERA_LENS_DISTORTION
* @ see ACAMERA_SCALER_CROP_REGION
* @ see ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE
* @ see ACAMERA_SENSOR_INFO_PRE_CORRECTION_ACTIVE_ARRAY_SIZE
*/
Eino-Ville Talvala
6 years ago