Image I/O

Input

Our API supports several options to provide source images that need to be processed.

HTTP(S) URL

URL of the input image should be from 1 to 512 characters. The image must be accessible by our system.

{
    "input": "https://letsenhance.io/docs/assets/samples/burger.jpg"
}

Image upload

Our API also supports the ability to upload image content directly. Just make sure that all respective headers are set. See Upload API Reference for more info.

Connected storage

You can connect Cloud Storage and use it as a source for images. Currently, our API supports AWS S3 and Google Cloud Storage.

After connecting your Cloud Storage, you can refer the storage name as an input.

{
    "input": "storage://storage-name/path/image-name.jpg"
}

Input image file types

Our API supports the following image formats as inputs: BMP, GIF, JPEG, PNG, TIFF, WEBP, AVIF, and HEIC.

Output

Configuration of result output is optional.

By default, you may omit the output option from the request payload. In this case, our system stores the result in a temporary bucket with a lifespan of 24 hours and provides a public URL to the image.

Alternatively, you can use a connected Cloud Storage: just configure the path to the folder where you want to store results.

Output image file types

The following image formats are supported for the output: JPEG, PNG, TIFF, WEBP and AVIF.

Basic and advanced output options

Basic Usage

{
    "output": "storage://storage-name/result-path/image-name.jpg"
}

Advanced Usage

"output": {
    "destination": "storage://storage-name/result-path/image-name.jpg",
    "format": "jpeg",
    "metadata": {
        "dpi": 300,
        "color_space": {
            "type": "CMYK",
            "color_profile": "ISO_Coated"
        }
    }
}

Advanced Format Usage

"output": {
    "destination": "storage://storage-name/result-path/image-name.jpg",
    "format": {
        "type": "jpeg",
        "quality": 85,
        "progressive": true
    }
}

See the full list of the advanced format-specific options below:

jpeg

Name	Type	Description
quality	integer	Specifies the amount of JPEG lossy compression in the range 1 - 100. Defaults to 85.
progressive	boolean	Progressive JPEG loads in a browser in successive waves until a clear picture is formed, thus improving the image loading speed. Used by default.

png

Name	Type	Description
compression	string	Indicates compression effort that will be applied during the PNG image encoding. Should have one of the values: fast is used to apply minimum compression resulting in a bigger image size but less processing time. best is used to apply maximum compression resulting in a smaller image size but more processing time. optimal is the default and used to balance between compression effort and processing time.

tiff

Name	Type	Description
compression	string, object	The TIFF codec supports both lossless and lossy modes of operation, so you can select the one that is appropriate for your goals. Should have one of the values: lossy is used to apply lossy compression to significantly reduce the image size in exchange for some loss of data, reducing the quality of an image. JPEG compression is used. {"type": "lossy", "quality": 1..100} is used to apply lossy compression and specify the amount of loss you are willing to accept. Defaults to 75. lossless is used to apply lossless compression to preserve maximum image detail in exchange for a significantly increased file size. Lempel–Ziv–Welch (LZW) compression is used. By default, lossless is used if compression is not selected.

avif

Name	Type	Description
compression	string, object	The AVIF codec supports both lossless and lossy modes of operation, so you can select the one that is appropriate for your goals. Should have one of the values: lossy is used to apply lossy compression to significantly reduce the image size in exchange for some loss of data, reducing the quality of an image. {"type": "lossy", "quality": 1..100} is used to apply lossy compression and specify the amount of loss you are willing to accept. Defaults to 50. lossless is used to apply lossless compression to preserve maximum image detail in exchange for a significantly increased file size.

webp

Name	Type	Description
compression	string, object	The WEBP format supports both lossless and lossy modes of operation, so you can select the one that is appropriate for your goals. Should have one of the values: lossy is used to apply lossy compression to significantly reduce the image size in exchange for some loss of data, reducing the quality of an image. {"type": "lossy", "quality": 1..100} is used to apply lossy compression and specify the amount of loss you are willing to accept. Defaults to 75. lossless is used to apply lossless compression to preserve maximum image detail in exchange for a significantly increased file size.

Color space

"output": {
    "destination": "storage://storage-name/result-path/image-name.jpg",
    "metadata": {
        "color_space": "RGB"
    }
}

Name	Type	Description
RGB	string	Is the color space for digital images. Use the RGB color mode if your image is supposed to be displayed on any kind of screen.
CMYK	string	Is the color space for printed materials. Use CMYK for any image that will be physically printed, not viewed on a screen.

For CMYK color space, you also can specify the color profile that will be applied to the image.

"output": {
    "destination": "storage://storage-name/result-path/image-name.jpg",
    "metadata": {
        "color_space": {
            "type": "CMYK",
            "color_profile": "ISO_Coated"
        }
    }
}

Name	Type	Description	TAC *	Characterisation data
ISO_Coated	string	Standard for glossy and matte coated paper (grades 1 and 2).	330%	Coated FOGRA39 ISO 12647-2:2004
ISO_Uncoated	string	Standard for uncoated white natural paper (grade 4).	300%	Uncoated FOGRA29 ISO 12647-2:2004
USWeb_Coated	string	Standard for glossy and matte coated paper in the United States (grades 1, 2, 3 and 4).	300%	SWOP2006 Coated3v2 CGATS TR003
USWeb_Uncoated	string	Standard for uncoated white natural paper in the United States (grade 4).	260%	GRACoL 2013 Uncoated CGATS21-2-CRPC3

* "Total Area Coverage” – or TAC for short – refers to the amount of ink coverage called for in a given area of an image. It's calculated by summing the Cyan, Magenta, Yellow and Black percentages in that area.

Color space is only supported in JPEG format.