PNG Process

pngencode

pngencode(img: np.ndarray, compression: int = 1) -> bytes | None

• Description: Encodes a numpy image into PNG bytes.

• Parameters

  • img (np.ndarray): Image array.
  • compression (int): Compression level (0 to 9). Default is 1.

• Returns

  • bytes | None: PNG bytes; returns None on failure.

• Example

  from capybara.vision.improc import imread, pngencode
  
  img = imread('lena.png')
  encoded_bytes = pngencode(img, compression=9)

pngdecode

pngdecode(byte_: bytes) -> np.ndarray | None

• Description: Decodes PNG bytes into a numpy image.

• Parameters

  • byte_ (bytes): PNG bytes.

• Returns

  • np.ndarray | None: Decoded image; returns None on failure.

• Example

  from capybara.vision.improc import pngdecode
  
  decoded_img = pngdecode(encoded_bytes)