Version 1.9.72 (Release Notes)


grayscalehttps://api.pixlab.io/grayscale

Description

Convert a given image colorspace to the gray color model. A grayscale (or graylevel) image is simply one in which the only colors are shades of gray. The reason for differentiating such images from any other sort of color image is that less information needs to be provided for each pixel. In fact a `gray' color is one in which the red, green and blue components all have equal intensity in RGB space, and so it is only necessary to specify a single intensity value for each pixel, as opposed to the three intensities needed to specify each pixel in a full color image.

Grayscale images are very common & entirely sufficient for many tasks such as face detection and so there is no need to use more complicated and harder-to-process color images. Source.

HTTP Methods

GET, POST

Request Parameters

Required

FieldsTypeDescription
imgURLInput image URL. If you want to upload your image directly from your app, then submit a multipart/form-data POST request.
keyStringYour PixLab API Key. You can also embed your key in the WWW-Authenticate: HTTP header and omit this parameter if you want to.


Optional
FieldsTypeDescription
blobBooleanBy default, this command return a JSON object holding the link to the image output. But, if this parameter is set to true then the image binary contents is returned instead.

POST Request Body (If you plan to use POST instead of a simple GET request)

Allowed Content-Type:

multipart/form-data
application/json

Use multipart/form-data if you want to upload your image directly (refer to the sample set for a working example). If you are using JSON, then your image must be already uploaded somewhere. Call store if you want to upload an image for example before invoking this endpoint.

Response

application/json if the optional blob parameter is not set.

This command return a JSON object after each call only if the optional blob parameter is not set. Otherwise the image binary contents is returned instead. The following are the JSON fields returned in response body:

FieldsTypeDescription
statusIntegerStatus code 200 indicates success, any other code indicates failure.
linkURLLink to the image output which is usually stored on the pixlab.xyz storage server unless you set your own S3 keys (refer to your dashboard on how to do that).
idStringUnique image ID.
errorStringError message if status != 200.

Python Example

import requests
import json

req = requests.get('https://api.pixlab.io/grayscale',params={'img':'http://www.allaboutbirds.org/guide/PHOTO/LARGE/blue_jay_8.jpg','key':'My_PixLab_Key'})
reply = req.json()
if reply['status'] != 200:
    print (reply['error'])
else:
    print ("Link to the grayscaled picture: "+ reply['link'])

See Also