Image-Operations.md

List of image operations

Table of contents

• List of image operations
  • Originals
  • Rotate
    • Preset
    • Query string
  • Blur
    • Preset
    • Query string
  • Grayscale
    • Preset
    • Query string
  • Resize
    • Preset
    • Query string
  • Crop
    • Preset
    • Query string
  • Extract
    • Preset
    • Query string
  • ResizeCropAuto
    • Preset
    • Query string
  • Watermark
    • Preset
    • Query string
  • Image format
    • Preset
    • Query string

Originals

Image

Rotate

Rotate the picture clockwise

Parameters

• angle - rotation angle

Preset

Rotate 90 degree

Query string

Rotate 90 degree
Rotate 180 degree

Blur

Blur the picture using Gaussian operator

Parameters:

• sigma - strength of operation

Preset

Blur image with sigma 5

Query string

Blur image sigma 10

Grayscale

Converts image to grayscale

Parameters: none

Preset

Change image colors to grayscale

Query string

Change image colors to grayscale

Resize

Change the size of an image without clipping. Parameters:

• width - choose width for the image. If not given, it will be calculated to preserve the aspect ratio.
• height - choose height for the image. If not given, it will be calculated to preserve the aspect ratio.

Preset

resize with width 500

Query string

resize with width 500

Crop

Crop smart the image. Parameters:

• width - width of the cropped area.
• height - height of the cropped area.
• gravity - position of crop (optional) Position can be one of:
  • center
  • north
  • west
  • east
  • south
  • smart

Preset

crop image with width 500

Query string

crop image with width 200 and height 200

Extract

Extract - crop given area from the image. Parameters:

• top - point on x axis
• left - point on y axis
• width - width of the cropped area.
• height - height of the cropped area.

Preset

crop image with width 500

Query string

crop image with width 200 and height 200

ResizeCropAuto

resize and crop given area from the image. Do it using proportion (center of image is used) Parameters:

• width - width of the cropped area.
• height - height of the cropped area.

Preset

crop image with width 555

Query string

crop image with width 200 and height 200

Watermark

Add watermark to image

Paramters:

• image: url or path to image for adding
• opacity: choose transparency of image
• position: anchor point of image to combine with. Can be one of:
  • top-left
  • top-center
  • top-right
  • center-left
  • center-center
  • center-right
  • bottom-left
  • bottom-center
  • bottom-right

Preset

Add gradient to image

Query string

Add gradient to iamge

Image format

Change image format

Parameters:

format: image format

Formats:

• jpeg
• webp
• png
• bmp

Preset

Change image format to webp

Query string

Change image format to webp