Image processing apparatus, image processing method, and image processing system
AssigneeCanon Kabushiki Kaisha
InventorTAKAHISA AKAISHI
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Abstract
An image processing apparatus acquiring image data whose color information is defined by N-bit signal values; acquiring data range information; quantizing the signal values for each of the color components in the acquired image data into M-bit signal values (N>M) based on the data range information; and a transmitting unit configured to transmit the quantized image data, wherein the quantizing is performed so that the maximum value of the signal values for each of the color components in the acquired image data becomes a maximum possible value in the range of the M bits, and the minimum value of the signal values for each of the color components in the acquired image data becomes a minimum possible value in the range of the M bits.
Claims14
An image processing apparatus comprising:
- a first acquiring unit configured to acquire image data whose color information is defined by N-bit signal values for each of color components;
- a second acquiring unit configured to acquire data range information indicating a maximum value and minimum value of the signal values for each of the color components in the image data acquired by the first acquiring unit;
- a quantizing unit configured to perform a quantization to quantize the signal values for each of the color components in the image data acquired by the first acquiring unit into M-bit signal values (N>M) based on the data range information acquired by the second acquiring unit;
- and
- a transmitting unit configured to transmit the quantized image data and the data range information corresponding to the image data acquired by the first acquiring unit in order to convert the signal values of the quantized image data into L-bit signal values (L>M),
- wherein the quantizing unit performs the quantization so that the maximum value of the signal values for each of the color components in the acquired image data becomes a maximum possible value in the range of the M bits, and the minimum value of the signal values for each of the color components in the acquired image data becomes a minimum possible value in the range of the M bits.
An image processing method comprising:
- acquiring image data whose color information is defined by N-bit signal values for each of color components;
- acquiring data range information indicating a maximum value and minimum value of the signal values for each of the color components in the acquired image data;
- performing a quantization to quantize the signal values for each of the color components in the acquired image data into M-bit signal values (N>M) based on the acquired data range information;
- and
- transmitting the quantized image data and the data range information corresponding to the acquired image data in order to convert the signal values of the quantized image data into L-bit signal values (L>M),
- wherein the quantization is performed so that the maximum value of the signal values for each of the color components in the acquired the image data becomes a maximum possible value in the range of the M bits, and the minimum value of the signal values for each of the color components in the acquired image data becomes a minimum possible value in the range of the M bits.
An image processing system comprising:
- a first acquiring unit configured to acquire image data whose color information is defined by N-bit signal values for each of color components;
- a second acquiring unit configured to acquire data range information indicating a maximum value and minimum value of the signal values for each of the color components in the acquired image data;
- a quantizing unit configured to perform a quantization to quantize the signal values for each of the color components in the acquired image data into M-bit signal values (N>M) based on the acquired data range information;
- and
- a transmitting unit configured to transmit the quantized image data and the data range information corresponding to the acquired image data in order to convert the signal values of the quantized image data into L-bit signal values (L>M).
Dependencies are inferred from the claim text.