gammahttps://api.pixlab.io/gamma
Description
Gamma-corrects an image. The same image viewed on different devices will have perceptual differences in the way the image's intensities are represented on the screen. Specify individual gamma levels for the red, green, and blue channels, or adjust all three with the gamma parameter. Values typically range from 0.8 to 2.3.
HTTP Methods
GET, POST
Request Parameters
Required
Fields | Type | Description |
---|---|---|
img | URL | Input image URL. If you want to upload your image directly from your app, then submit a multipart/form-data POST request. |
gamma | Float | The amount of gamma-correction (Max value is set to 10.00). |
key | String | Your PixLab API Key. You can also embed your key in the WWW-Authenticate: HTTP header and omit this parameter if you want to. |
Optional
Fields | Type | Description |
---|---|---|
blob | Boolean | By 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. |
channel | Integer | Color channel constant. To apply to more than one channel, combine channel type constants using bitwise operators. If this field is missing, then all image channels will be affected (See below for the list of channels constant). |
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.
Channels Constant
Fields | Value |
---|---|
CHANNEL_RED | 1 |
CHANNEL_GRAY | 1 |
CHANNEL_CYAN | 1 |
CHANNEL_GREEN | 2 |
CHANNEL_MAGENTA | 2 |
CHANNEL_BLUE | 4 |
CHANNEL_YELLOW | 4 |
CHANNEL_ALPHA | 8 |
CHANNEL_OPACITY | 8 |
CHANNEL_MATTE | 8 |
CHANNEL_BLACK | 32 |
CHANNEL_INDEX | 32 |
CHANNEL_ALL | 134217727 |
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:
Fields | Type | Description |
---|---|---|
status | Integer | Status code 200 indicates success, any other code indicates failure. |
link | URL | Link 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). |
id | String | Unique image ID. |
error | String | Error message if status != 200. |
Python Example
# Refer to https://github.com/symisc/pixlab for the full list of production ready code samples...
See Also
blackthreshold, border3d, border, charcoal, chop, despeckle, deskew, edge, emboss, equalize, extent, flatten, flip