tf.image.encode_jpeg

tf.image.encode_jpeg

tf.image.encode_jpeg

encode_jpeg(
    image,
    format=None,
    quality=None,
    progressive=None,
    optimize_size=None,
    chroma_downsampling=None,
    density_unit=None,
    x_density=None,
    y_density=None,
    xmp_metadata=None,
    name=None
)

Defined in tensorflow/python/ops/gen_image_ops.py.

See the guide: Images > Encoding and Decoding

JPEG-encode an image.

image is a 3-D uint8 Tensor of shape [height, width, channels].

The attr format can be used to override the color format of the encoded output. Values can be:

• '': Use a default format based on the number of channels in the image.
• grayscale: Output a grayscale JPEG image. The channels dimension of image must be 1.
• rgb: Output an RGB JPEG image. The channels dimension of image must be 3.

If format is not specified or is the empty string, a default format is picked in function of the number of channels in image:

• 1: Output a grayscale image.
• 3: Output an RGB image.

Args:

• image: A Tensor of type uint8. 3-D with shape [height, width, channels].
• format: An optional string from: "", "grayscale", "rgb". Defaults to "". Per pixel image format.
• quality: An optional int. Defaults to 95. Quality of the compression from 0 to 100 (higher is better and slower).
• progressive: An optional bool. Defaults to False. If True, create a JPEG that loads progressively (coarse to fine).
• optimize_size: An optional bool. Defaults to False. If True, spend CPU/RAM to reduce size with no quality change.
• chroma_downsampling: An optional bool. Defaults to True. See http://en.wikipedia.org/wiki/Chroma_subsampling.
• density_unit: An optional string from: "in", "cm". Defaults to "in". Unit used to specify x_density and y_density: pixels per inch ('in') or centimeter ('cm').
• x_density: An optional int. Defaults to 300. Horizontal pixels per density unit.
• y_density: An optional int. Defaults to 300. Vertical pixels per density unit.
• xmp_metadata: An optional string. Defaults to "". If not empty, embed this XMP metadata in the image header.
• name: A name for the operation (optional).

Returns:

A Tensor of type string. 0-D. JPEG-encoded image.