CMYK JPEG images are not properly painted

[bimusiek]

So here is example of CMYK Jpeg that we try just to draw on canvas in nodejs.

And here is an result of it.

Code that I am using:

        this.context.drawImage(this.imageObj, imageX, imageY, imageWidth, imageHeight);

I would suggest to return exception that JPEG CMYK is not supported.

[somecodemonkey]

+1

[imjared]

Did either of you find a way around this? This is looking like a pain point for my application.

[bimusiek]

We changed our backend to convert CMYK to RGB before sending it to NodeJS.

[jakeg]

I also experience this problem but we have very few customers using CMYK images so it's not a priority for us at the moment.

[vasili-zolotov]

+1 Just spent the day tracing the issues through the processing pipeline and all signs point to this as the root cause.

[jakeg]

Happy to offer a bounty for anyone who wants to add support for CMYK jpgs.

[bruceCzK]

I'm facing the same issue, and I just use gm to convert images to RGB colorspace using following function. Make sure gm installed first.

const gm = require('gm')

function convertToRGB(file) {
  return new Promise((resolve, reject) => {
    gm(file).colorspace('RGB').toBuffer((err, buffer) => {
      if (err) {
        return reject(err)
      }
      resolve(buffer)
    });
  });
}

[bhouston]

This is also affecting YCCK images. Add this so that this thread appears in searches for the YCCK keyword.

[vlad-dudu]

Has anyone managed to find a solution for this issue besides converting the image to RGB prior to sending it to node canvas?