Resizing

Function Description

Resizes the input image and outputs it to the Image object.

For details about the API, see resize.

API Calling Process

Before calling the resizing APIs, prepare the image object to be resized.

Figure 1 Process of calling image processing (resizing) APIs

Key steps are demonstrated as follows:

1. Perform global initialization by calling mx_init().
2. Initialize ImageProcessor.

   Construct the ImageProcessor object. You need to specify the device ID during the construction.

3. Call the image decoding API to decode the input image.

   Decode the image based on services to generate an Image object that can be resized. Subsequently, the image can be processed by using the image processing APIs to generate a final Image object to be resized.

4. Construct the resizing parameters and the output Image.

   Construct the corresponding input Size and output Image based on service requirements.

5. Pass the input image and other parameters to the resize API to obtain the resizing result.
6. Perform deinitialization by calling mx_deinit().

Sample Code

The following is a code example of key steps of functions and features, which is for reference only and cannot be directly copied for execution.

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from mindx.sdk import base  
from mindx.sdk.base import ImageProcessor, Size, Image

def process():
    # Image decoding
    # Initialize the ImageProcessor object.
    imageProcessor = ImageProcessor(device_id)  
    image_path = "image_data/test_image.jpg"  
    # Read the image path for decoding. The decoding format is nv12 (YUV_SP_420).
    decoded_image = imageProcessor.decode(image_path, base.nv12)  
    
    # Resize an image.
   # Resizing size
    size_para = Size(224, 224)  
    # Resize the decoded Image class by size. The resizing mode is the high-order filtering algorithm developed by Huawei (huaweiu_high_order_filter).
    resized_image = imageProcessor.resize(decoded_image, size_para, base.huaweiu_high_order_filter)

if __name__ == "__main__":
    base.mx_init()    # Initialize resources.
    process()
    base.mx_deinit()  # Deinitialize resources.