Create ML training error Unexpected JPEG decode failure

Question

Created Nov ’19

Replies 3

Boosts 1

Views 2.2k

Participants 5

Hi, I'm trying to build an object detector model using create ml. After a lot of exploration, I figured the annotation.json format which is expected by the training input. It's something like this:

[{"image":"orange_1.jpg",

     "annotations":[

     {"label":"orange","coordinates":{"y":1132,"x":781,"width":413,"height":394}},

     {"label":"orange","coordinates":{"y":1167,"x":308,"width":397,"height":375}}

      ]

     }
]

On running the training, I get the following error:

Training Error. Unxpected JPEG decode failure.

I confirm that the file name is exactly the same in the training folder.

Any leads on how to go about this?

Boost

Answer 1

DTS Engineer OP

Apple

Nov ’19

That is actually not the correct JSON format for an object detector, the correct format can be found at this link:

https://developer.apple.com/documentation/createml/mlobjectdetector/datasource

0

Answer 2

allie123 OP

Nov ’19

Hi, I tried following the naming conventions from the docs link you shared. Still no luck 😟

[
  {
    "imagefilename": "orange_1.jpg",
    "annotation": [
      {
        "label": "orange",
        "coordinates": {
          "y": 400,
          "x": 400,
          "height": 394,
          "width": 413
        }
      },
      {
        "label": "orange",
        "coordinates": {
          "y": 167,
          "x": 108,
          "height": 375,
          "width": 397
        
        }
      }
    ]
  }
]

Also, it says unexpected JPEG decode error once the training starts.

0

Answer 3

Alzin Mohamad Ghaith OP

Dec ’19

I got the same error, I checked the type of images that I got downloaded from the internet, so before that I was naming my images, for example,

cat.0.jpg

cat.1.jpg

....

..

cat.100.jpg

However, After getting the error, I read the info of some images, I found all images are jpg types from the original source, for example,

https://cdn.pixabay.com/photo/2016/09/13/05/47/gears-1666494__340.jpg

And I found five images were png types, like this:

https://cdn.pixabay.com/photo/2017/08/19/23/54/email-sign-2660276__340.png

So, I changed these to,

cat.55.png

cat.34.png

And jumped to the create ML againg hitting the start training button, it runs correctly, but I realized that these 5 images of type png are not recognizable from create ML at all so replace with other data of type jpg.

Hope this helps anyone will have the same error!

0