CODEWITHSUNDEEP
node.jsnpmimage-manipulationgraphicsmagick
Prerna Jain
Prerna Jain

Reputation: 1240

Manipulation of an Image in Node.js

I want to change the orientation of an image as from portrait to landscape or vice-versa.

I tried doing it using many of the available npm packages :
* rotate-image
* image-rotate
* jpegorientation
* gm
* rad

But each of these is one way or other not working as I want to do it or each has some or other limitations.
I tried to find a possible solution and search for it as much as I could. Most of the times,it has been done using gm. I tried doing the image manipulation using gm :

Code:

var gm = require('gm');
gm('path/filename.jpg')
    .autoOrient()
   .write('path/destinationfile.jpg', function (err) {
        if (err) {
            console.log(err);
        } else
            console.log("Orientation changed successfully!");
    })

But I am getting an error as :

Error: Could not execute GraphicsMagick/ImageMagick: gm "identify" "-ping" "-verbose" "path/filename.jpg" this most likely means the gm/convert binaries can't be found.

This error will be resolved only by using external binary libraries.I don't want to involve any kind of dependencies on 3rd party libraries.
Can someone please help me out as of how to do it without pre-installing any of the external binary libraries (brew etc.) or how to use any of the existing package in a better way.

Upvotes: 1

Views: 3357

Answers (3)

stone
stone

Reputation: 1

$ sudo apt-get install graphicsmagick

Upvotes: -2

kenberkeley
kenberkeley

Reputation: 9766

Mostly likely is the PATH problem (of CentOS). So I would try this:

sudo ln -s /usr/local/bin/gm /usr/bin/gm
sudo ln -s /usr/local/bin/convert /usr/bin/convert

Hope it could help.

Upvotes: 1

Robbie
Robbie

Reputation: 19490

You could use the contain method from lwip - Light Weight Image Processor for NodeJS

Here is an example:

// obtain an image object:
require('lwip').open('Example.jpg', function(err, image){
  // check err...
  // define a batch of manipulations and save to disk as JPEG:
  image.batch()
    .contain(image.height(), image.width(), 'black')
    .writeFile('output.jpg', function(err){
      // check err...
      console.log(err || 'Done');
    });
});

This swaps the orientation and fills the gaps in black.

I just tried it, and i only needed to install the lwip module into my application. 

npm install lwip --save

Upvotes: 3

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