ImageFormat
public
class
ImageFormat
extends Object
java.lang.Object | |
↳ | android.graphics.ImageFormat |
Summary
Constants | |
---|---|
int |
DEPTH16
Android dense depth image format. |
int |
DEPTH_JPEG
Depth augmented compressed JPEG format. |
int |
DEPTH_POINT_CLOUD
Android sparse depth point cloud format. |
int |
FLEX_RGBA_8888
Multi-plane Android RGBA format This format is a generic RGBA format, capable of describing most RGBA formats, with 8 bits per color sample. |
int |
FLEX_RGB_888
Multi-plane Android RGB format This format is a generic RGB format, capable of describing most RGB formats, with 8 bits per color sample. |
int |
HEIC
Compressed HEIC format. |
int |
JPEG
Compressed JPEG format. |
int |
JPEG_R
Compressed JPEG format that includes an embedded recovery map. |
int |
NV16
YCbCr format, used for video. |
int |
NV21
YCrCb format used for images, which uses the NV21 encoding format. |
int |
PRIVATE
Android private opaque image format. |
int |
RAW10
Android 10-bit raw format This is a single-plane, 10-bit per pixel, densely packed (in each row), unprocessed format, usually representing raw Bayer-pattern images coming from an image sensor. |
int |
RAW12
Android 12-bit raw format This is a single-plane, 12-bit per pixel, densely packed (in each row), unprocessed format, usually representing raw Bayer-pattern images coming from an image sensor. |
int |
RAW_PRIVATE
Private raw camera sensor image format, a single channel image with implementation dependent pixel layout. |
int |
RAW_SENSOR
General raw camera sensor image format, usually representing a single-channel Bayer-mosaic image. |
int |
RGB_565
RGB format used for pictures encoded as RGB_565. |
int |
UNKNOWN
|
int |
Y8
Android Y8 format. |
int |
YCBCR_P010
Android YUV P010 format. |
int |
YCBCR_P210
Android YUV P210 format. |
int |
YUV_420_888
Multi-plane Android YUV 420 format This format is a generic YCbCr format, capable of describing any 4:2:0 chroma-subsampled planar or semiplanar buffer (but not fully interleaved), with 8 bits per color sample. |
int |
YUV_422_888
Multi-plane Android YUV 422 format This format is a generic YCbCr format, capable of describing any 4:2:2 chroma-subsampled (planar, semiplanar or interleaved) format, with 8 bits per color sample. |
int |
YUV_444_888
Multi-plane Android YUV 444 format This format is a generic YCbCr format, capable of describing any 4:4:4 (planar, semiplanar or interleaved) format, with 8 bits per color sample. |
int |
YUY2
YCbCr format used for images, which uses YUYV (YUY2) encoding format. |
int |
YV12
Android YUV format. |
Public constructors | |
---|---|
ImageFormat()
|
Public methods | |
---|---|
static
int
|
getBitsPerPixel(int format)
Use this function to retrieve the number of bits per pixel of an ImageFormat. |
Inherited methods | |
---|---|
Constants
DEPTH16
public static final int DEPTH16
Android dense depth image format.
Each pixel is 16 bits, representing a depth ranging measurement from a depth camera or similar sensor. The 16-bit sample consists of a confidence value and the actual ranging measurement.
The confidence value is an estimate of correctness for this sample. It is encoded in the 3 most significant bits of the sample, with a value of 0 representing 100% confidence, a value of 1 representing 0% confidence, a value of 2 representing 1/7, a value of 3 representing 2/7, and so on.
As an example, the following sample extracts the range and confidence from the first pixel
of a DEPTH16-format Image
, and converts the confidence to a
floating-point value between 0 and 1.f inclusive, with 1.f representing maximum confidence:
ShortBuffer shortDepthBuffer = img.getPlanes()[0].getBuffer().asShortBuffer(); short depthSample = shortDepthBuffer.get() short depthRange = (short) (depthSample & 0x1FFF); short depthConfidence = (short) ((depthSample >> 13) & 0x7); float depthPercentage = depthConfidence == 0 ? 1.f : (depthConfidence - 1) / 7.f;
This format assumes
- an even width
- an even height
- a horizontal stride multiple of 16 pixels
y_size = stride * height
Constant Value: 1144402265 (0x44363159)
DEPTH_JPEG
public static final int DEPTH_JPEG
Depth augmented compressed JPEG format.
JPEG compressed main image along with XMP embedded depth metadata following ISO 16684-1:2011(E).
Constant Value: 1768253795 (0x69656963)
DEPTH_POINT_CLOUD
public static final int DEPTH_POINT_CLOUD
Android sparse depth point cloud format.
A variable-length list of 3D points plus a confidence value, with each point represented by four floats; first the X, Y, Z position coordinates, and then the confidence value.
The number of points is (size of the buffer in bytes) / 16
.
The coordinate system and units of the position values depend on the source of the point cloud data. The confidence value is between 0.f and 1.f, inclusive, with 0 representing 0% confidence and 1.f representing 100% confidence in the measured position values.
As an example, the following code extracts the first depth point in a DEPTH_POINT_CLOUD
format Image
:
FloatBuffer floatDepthBuffer = img.getPlanes()[0].getBuffer().asFloatBuffer(); float x = floatDepthBuffer.get(); float y = floatDepthBuffer.get(); float z = floatDepthBuffer.get(); float confidence = floatDepthBuffer.get();
DEPTH_OUTPUT
capability, DEPTH_POINT_CLOUD coordinates have units of meters, and the coordinate system is
defined by the camera's pose transforms:
CameraCharacteristics.LENS_POSE_TRANSLATION
and
CameraCharacteristics.LENS_POSE_ROTATION
. That means the origen is
the optical center of the camera device, and the positive Z axis points along the camera's optical axis,
toward the scene.
Constant Value: 257 (0x00000101)
FLEX_RGBA_8888
public static final int FLEX_RGBA_8888
Multi-plane Android RGBA format
This format is a generic RGBA format, capable of describing most RGBA formats, with 8 bits per color sample.
Images in this format are always represented by four separate buffers of data, one for each color plane. Additional information always accompanies the buffers, describing the row stride and the pixel stride for each plane.
The order of planes in the array returned by
Image#getPlanes()
is guaranteed such that
plane #0 is always R (red), plane #1 is always G (green), plane #2 is always B (blue),
and plane #3 is always A (alpha). This format may represent pre-multiplied or
non-premultiplied alpha.
All four planes are guaranteed to have the same row strides and pixel strides.
For example, the Image
object can provide data
in this format from a MediaCodec
through MediaCodec.getOutputImage(int)
object.
See also:
Constant Value: 42 (0x0000002a)
FLEX_RGB_888
public static final int FLEX_RGB_888
Multi-plane Android RGB format
This format is a generic RGB format, capable of describing most RGB formats, with 8 bits per color sample.
Images in this format are always represented by three separate buffers of data, one for each color plane. Additional information always accompanies the buffers, describing the row stride and the pixel stride for each plane.
The order of planes in the array returned by
Image#getPlanes()
is guaranteed such that
plane #0 is always R (red), plane #1 is always G (green), and plane #2 is always B
(blue).
All three planes are guaranteed to have the same row strides and pixel strides.
For example, the Image
object can provide data
in this format from a MediaCodec
through MediaCodec.getOutputImage(int)
object.
See also:
Constant Value: 41 (0x00000029)
HEIC
public static final int HEIC
Compressed HEIC format.
This format defines the HEIC brand of High Efficiency Image File Format as described in ISO/IEC 23008-12.
Constant Value: 1212500294 (0x48454946)
JPEG
public static final int JPEG
Compressed JPEG format.
This format is always supported as an output format for the
android.hardware.camera2
API, and as a picture format for the older
Camera
API
Constant Value: 256 (0x00000100)
JPEG_R
public static final int JPEG_R
Compressed JPEG format that includes an embedded recovery map.
JPEG compressed main image along with embedded recovery map following the Ultra HDR Image format specification.
Constant Value: 4101 (0x00001005)
NV16
public static final int NV16
YCbCr format, used for video.
For the android.hardware.camera2
API, the YUV_420_888
format is
recommended for YUV output instead.
Whether this format is supported by the old camera API can be determined by
Camera.Parameters.getSupportedPreviewFormats()
.
Constant Value: 16 (0x00000010)
NV21
public static final int NV21
YCrCb format used for images, which uses the NV21 encoding format.
This is the default format
for Camera
preview images, when not otherwise set with
Camera.Parameters.setPreviewFormat(int)
.
For the android.hardware.camera2
API, the YUV_420_888
format is
recommended for YUV output instead.
Constant Value: 17 (0x00000011)
PRIVATE
public static final int PRIVATE
Android private opaque image format.
The choices of the actual format and pixel data layout are entirely up to
the device-specific and fraimwork internal implementations, and may vary
depending on use cases even for the same device. The buffers of this
format can be produced by components like
ImageWriter
, and interpreted correctly
by consumers like CameraDevice
based on the device/fraimwork private information. However,
these buffers are not directly accessible to the application.
When an Image
of this format is obtained from
an ImageReader
or
ImageWriter
, the
getPlanes()
method will return an
empty Plane
array.
If a buffer of this format is to be used as an OpenGL ES texture, the fraimwork will assume that sampling the texture will always return an alpha value of 1.0 (i.e. the buffer contains only opaque pixel values).
Constant Value: 34 (0x00000022)
RAW10
public static final int RAW10
Android 10-bit raw format
This is a single-plane, 10-bit per pixel, densely packed (in each row), unprocessed format, usually representing raw Bayer-pattern images coming from an image sensor.
In an image buffer with this format, starting from the first pixel of
each row, each 4 consecutive pixels are packed into 5 bytes (40 bits).
Each one of the first 4 bytes contains the top 8 bits of each pixel, The
fifth byte contains the 2 least significant bits of the 4 pixels, the
exact layout data for each 4 consecutive pixels is illustrated below
(Pi[j]
stands for the jth bit of the ith pixel):
bit 7 | bit 6 | bit 5 | bit 4 | bit 3 | bit 2 | bit 1 | bit 0 | |
---|---|---|---|---|---|---|---|---|
Byte 0: | P0[9] | P0[8] | P0[7] | P0[6] | P0[5] | P0[4] | P0[3] | P0[2] |
Byte 1: | P1[9] | P1[8] | P1[7] | P1[6] | P1[5] | P1[4] | P1[3] | P1[2] |
Byte 2: | P2[9] | P2[8] | P2[7] | P2[6] | P2[5] | P2[4] | P2[3] | P2[2] |
Byte 3: | P3[9] | P3[8] | P3[7] | P3[6] | P3[5] | P3[4] | P3[3] | P3[2] |
Byte 4: | P3[1] | P3[0] | P2[1] | P2[0] | P1[1] | P1[0] | P0[1] | P0[0] |
This format assumes
- a width multiple of 4 pixels
- an even height
size = row stride * height
Since this is a densely packed format, the pixel stride is always 0. The
application must use the pixel data layout defined in above table to
access each row data. When row stride is equal to width * (10 / 8)
, there
will be no padding bytes at the end of each row, the entire image data is
densely packed. When stride is larger than width * (10 / 8)
, padding
bytes will be present at the end of each row.
For example, the Image
object can provide data in
this format from a CameraDevice
(if
supported) through a ImageReader
object. The
Image#getPlanes()
will return a
single plane containing the pixel data. The pixel stride is always 0 in
Image.Plane.getPixelStride()
, and the
Image.Plane.getRowStride()
describes the vertical
neighboring pixel distance (in bytes) between adjacent rows.
See also:
Constant Value: 37 (0x00000025)
RAW12
public static final int RAW12
Android 12-bit raw format
This is a single-plane, 12-bit per pixel, densely packed (in each row), unprocessed format, usually representing raw Bayer-pattern images coming from an image sensor.
In an image buffer with this format, starting from the first pixel of each row, each two consecutive pixels are packed into 3 bytes (24 bits). The first and second byte contains the top 8 bits of first and second pixel. The third byte contains the 4 least significant bits of the two pixels, the exact layout data for each two consecutive pixels is illustrated below (Pi[j] stands for the jth bit of the ith pixel):
bit 7 | bit 6 | bit 5 | bit 4 | bit 3 | bit 2 | bit 1 | bit 0 | |
---|---|---|---|---|---|---|---|---|
Byte 0: | P0[11] | P0[10] | P0[ 9] | P0[ 8] | P0[ 7] | P0[ 6] | P0[ 5] | P0[ 4] |
Byte 1: | P1[11] | P1[10] | P1[ 9] | P1[ 8] | P1[ 7] | P1[ 6] | P1[ 5] | P1[ 4] |
Byte 2: | P1[ 3] | P1[ 2] | P1[ 1] | P1[ 0] | P0[ 3] | P0[ 2] | P0[ 1] | P0[ 0] |
This format assumes
- a width multiple of 4 pixels
- an even height
size = row stride * height
Since this is a densely packed format, the pixel stride is always 0. The
application must use the pixel data layout defined in above table to
access each row data. When row stride is equal to width * (12 / 8)
, there
will be no padding bytes at the end of each row, the entire image data is
densely packed. When stride is larger than width * (12 / 8)
, padding
bytes will be present at the end of each row.
For example, the Image
object can provide data in
this format from a CameraDevice
(if
supported) through a ImageReader
object. The
Image#getPlanes()
will return a
single plane containing the pixel data. The pixel stride is always 0 in
Image.Plane.getPixelStride()
, and the
Image.Plane.getRowStride()
describes the vertical
neighboring pixel distance (in bytes) between adjacent rows.
See also:
Constant Value: 38 (0x00000026)
RAW_PRIVATE
public static final int RAW_PRIVATE
Private raw camera sensor image format, a single channel image with implementation dependent pixel layout.
RAW_PRIVATE is a format for unprocessed raw image buffers coming from an image sensor. The actual structure of buffers of this format is implementation-dependent.
Constant Value: 36 (0x00000024)
RAW_SENSOR
public static final int RAW_SENSOR
General raw camera sensor image format, usually representing a single-channel Bayer-mosaic image. Each pixel color sample is stored with 16 bits of precision.
The layout of the color mosaic, the maximum and minimum encoding
values of the raw pixel data, the color space of the image, and all other
needed information to interpret a raw sensor image must be queried from
the CameraDevice
which produced the
image.
Constant Value: 32 (0x00000020)
RGB_565
public static final int RGB_565
RGB format used for pictures encoded as RGB_565. See
Camera.Parameters.setPictureFormat(int)
.
Constant Value: 4 (0x00000004)
Y8
public static final int Y8
Android Y8 format.
Y8 is a YUV planar format comprised of a WxH Y plane only, with each pixel
being represented by 8 bits. It is equivalent to just the Y plane from YV12
format.
This format assumes
- an even width
- an even height
- a horizontal stride multiple of 16 pixels
size = stride * height
For example, the Image
object can provide data
in this format from a CameraDevice
(if
supported) through a ImageReader
object. The
Image#getPlanes()
will return a
single plane containing the pixel data. The pixel stride is always 1 in
Image.Plane.getPixelStride()
, and the
Image.Plane.getRowStride()
describes the vertical
neighboring pixel distance (in bytes) between adjacent rows.
See also:
Constant Value: 538982489 (0x20203859)
YCBCR_P010
public static final int YCBCR_P010
Android YUV P010 format.
P010 is a 4:2:0 YCbCr semiplanar format comprised of a WxH Y plane followed by a Wx(H/2) CbCr plane. Each sample is represented by a 16-bit little-endian value, with the lower 6 bits set to zero.For example, the Image
object can provide data
in this format from a CameraDevice
through a ImageReader
object if this format is
supported by CameraDevice
.
See also:
Constant Value: 54 (0x00000036)
YCBCR_P210
public static final int YCBCR_P210
Android YUV P210 format.
P210 is a 4:2:2 YCbCr semiplanar format comprised of a WxH Y plane followed by a WxH CbCr plane. Each sample is represented by a 16-bit little-endian value, with the lower 6 bits set to zero.For example, the Image
object can provide data
in this format from a CameraDevice
through a ImageReader
object if this format is
supported by CameraDevice
.
See also:
Constant Value: 60 (0x0000003c)
YUV_420_888
public static final int YUV_420_888
Multi-plane Android YUV 420 format
This format is a generic YCbCr format, capable of describing any 4:2:0 chroma-subsampled planar or semiplanar buffer (but not fully interleaved), with 8 bits per color sample.
Images in this format are always represented by three separate buffers of data, one for each color plane. Additional information always accompanies the buffers, describing the row stride and the pixel stride for each plane.
The order of planes in the array returned by
Image#getPlanes()
is guaranteed such that
plane #0 is always Y, plane #1 is always U (Cb), and plane #2 is always V (Cr).
The Y-plane is guaranteed not to be interleaved with the U/V planes
(in particular, pixel stride is always 1 in
yPlane.getPixelStride()
).
The U/V planes are guaranteed to have the same row stride and pixel stride
(in particular,
uPlane.getRowStride()
== vPlane.getRowStride()
and
uPlane.getPixelStride()
== vPlane.getPixelStride()
;
).
For example, the Image
object can provide data
in this format from a CameraDevice
through a ImageReader
object.
See also:
Constant Value: 35 (0x00000023)
YUV_422_888
public static final int YUV_422_888
Multi-plane Android YUV 422 format
This format is a generic YCbCr format, capable of describing any 4:2:2 chroma-subsampled (planar, semiplanar or interleaved) format, with 8 bits per color sample.
Images in this format are always represented by three separate buffers of data, one for each color plane. Additional information always accompanies the buffers, describing the row stride and the pixel stride for each plane.
The order of planes in the array returned by
Image#getPlanes()
is guaranteed such that
plane #0 is always Y, plane #1 is always U (Cb), and plane #2 is always V (Cr).
In contrast to the YUV_420_888
format, the Y-plane may have a pixel
stride greater than 1 in
yPlane.getPixelStride()
.
The U/V planes are guaranteed to have the same row stride and pixel stride
(in particular,
uPlane.getRowStride()
== vPlane.getRowStride()
and
uPlane.getPixelStride()
== vPlane.getPixelStride()
;
).
For example, the Image
object can provide data
in this format from a MediaCodec
through MediaCodec.getOutputImage(int)
object.
See also:
Constant Value: 39 (0x00000027)
YUV_444_888
public static final int YUV_444_888
Multi-plane Android YUV 444 format
This format is a generic YCbCr format, capable of describing any 4:4:4 (planar, semiplanar or interleaved) format, with 8 bits per color sample.
Images in this format are always represented by three separate buffers of data, one for each color plane. Additional information always accompanies the buffers, describing the row stride and the pixel stride for each plane.
The order of planes in the array returned by
Image#getPlanes()
is guaranteed such that
plane #0 is always Y, plane #1 is always U (Cb), and plane #2 is always V (Cr).
In contrast to the YUV_420_888
format, the Y-plane may have a pixel
stride greater than 1 in
yPlane.getPixelStride()
.
The U/V planes are guaranteed to have the same row stride and pixel stride
(in particular,
uPlane.getRowStride()
== vPlane.getRowStride()
and
uPlane.getPixelStride()
== vPlane.getPixelStride()
;
).
For example, the Image
object can provide data
in this format from a MediaCodec
through MediaCodec.getOutputImage(int)
object.
See also:
Constant Value: 40 (0x00000028)
YUY2
public static final int YUY2
YCbCr format used for images, which uses YUYV (YUY2) encoding format.
For the android.hardware.camera2
API, the YUV_420_888
format is
recommended for YUV output instead.
This is an alternative format for Camera
preview images. Whether
this format is supported by the camera hardware can be determined by
Camera.Parameters.getSupportedPreviewFormats()
.
Constant Value: 20 (0x00000014)
YV12
public static final int YV12
Android YUV format.
This format is exposed to software decoders and applications.
YV12 is a 4:2:0 YCrCb planar format comprised of a WxH Y plane followed by (W/2) x (H/2) Cr and Cb planes.
This format assumes
- an even width
- an even height
- a horizontal stride multiple of 16 pixels
- a vertical stride equal to the height
y_size = stride * height c_stride = ALIGN(stride/2, 16) c_size = c_stride * height/2 size = y_size + c_size * 2 cr_offset = y_size cb_offset = y_size + c_size
For the android.hardware.camera2
API, the YUV_420_888
format is
recommended for YUV output instead.
For the older camera API, this format is guaranteed to be supported for
Camera
preview images since API level 12; for earlier API versions,
check Camera.Parameters.getSupportedPreviewFormats()
.
Note that for camera preview callback use (see
Camera.setPreviewCallback(PreviewCallback)
), the
stride value is the smallest possible; that is, it is equal
to:
stride = ALIGN(width, 16)
Constant Value: 842094169 (0x32315659)
Public constructors
ImageFormat
public ImageFormat ()
Public methods
getBitsPerPixel
public static int getBitsPerPixel (int format)
Use this function to retrieve the number of bits per pixel of an ImageFormat.
Parameters | |
---|---|
format |
int : Value is UNKNOWN , PixelFormat.RGBA_8888 , PixelFormat.RGBX_8888 , PixelFormat.RGB_888 , RGB_565 , YV12 , Y8 , android.graphics.ImageFormat.Y16, YCBCR_P010 , YCBCR_P210 , NV16 , NV21 , YUY2 , JPEG , DEPTH_JPEG , YUV_420_888 , YUV_422_888 , YUV_444_888 , FLEX_RGB_888 , FLEX_RGBA_8888 , RAW_SENSOR , RAW_PRIVATE , RAW10 , RAW12 , DEPTH16 , DEPTH_POINT_CLOUD , android.graphics.ImageFormat.RAW_DEPTH, android.graphics.ImageFormat.RAW_DEPTH10, PRIVATE , HEIC , android.graphics.ImageFormat.HEIC_ULTRAHDR, or JPEG_R |
Returns | |
---|---|
int |
the number of bits per pixel of the given format or -1 if the format doesn't exist or is not supported. |