Why use 'MemoryDataLayer' output is different from using 'imageDataLayer'

[Su]

Between the prototxts,  only top data layer is difference,  but when I extract the feature of pictures (from same layer, same picture), the output is difference. As follows：

MemoryDataLayer Result:

0 0 3.82127 0 2.06292 0 0 0 0 0 0 0 2.43437 4.78357 0 0 0 0 0.211604 0 0 0 0 0 0 1.10624 0 0 0 0 0 .....

ImageDataLayer result

0 0 2.29276 0 1.23775 0 0 0.214584 0 0 5.27333 0 1.46062 2.87014 0 0 0 0 0.126962 0 13.2942 0 0 0 0 ......

Memory based prototxt：

layer {

   name: "data"

   type:"MemoryData"

   top: "data"

   top: "label"

   memory_data_param {

        batch_size: 1

        channels:3

        height: 224

        width: 224

    }

  transform_param {

    crop_size: 224

    mirror: false

  }

}

...

ImageDataLayer based prototxt：

  layer {

   name: "data"

   type: "ImageData"

   top: "data"

   top: "label"

   image_data_param {   

source:"/_temp/file_list"

batch_size: 1

new_height: 224 

new_width: 224

    }     

  }

                ...

1. I resize the picture when using memory data

2. result is different， and in some