Electronic apparatus, and method and computer-readable medium for the same

A method adapted to be implemented on an electronic apparatus, the method comprising:

• separating target image data into a plurality of pixel blocks;
• serially inputting luminance data and color difference data of each pixel block as individual pieces of block data, respectively;
• serially converting each piece of the block data into quantized data via execution of frequency conversion and quantization for each piece of the block data;
• serially converting each piece of the quantized data into encoded data via entropy encoding of each piece of the quantized data;
• generating compressed color image data corresponding to the target image data, using the encoded data;
• and
• generating compressed monochrome image data corresponding to the target image data, using the encoded data, by performing one of:
• deleting particular pieces of encoded data corresponding to the color difference data from a data sequence of the encoded data generated through the entropy encoding of each piece of the quantized data;
• and
• replacing the particular pieces of encoded data corresponding to the color difference data with encoded data corresponding to monochrome color difference data,
• wherein after converting each piece of the quantized data via the entropy encoding into the encoded data, allocate the encoded data both to a color data generator configured to generate the compressed color image data and to a monochrome data generator configured to generate the compressed mono chrome image data.

A non-transitory computer-readable medium storing computer-readable instructions configured to, when executed by a processor, cause the processor to:

• separate target image data into a plurality of pixel blocks;
• serially input luminance data and color difference data of each pixel block as individual pieces of block data, respectively;
• serially convert each piece of the block data into quantized data via execution of frequency conversion and quantization for each piece of the block data;
• serially convert each piece of the quantized data into encoded data via entropy encoding of each piece of the quantized data;
• generate compressed color image data corresponding to the target image data, using the encoded data;
• and
• generate compressed monochrome image data corresponding to the target image data, using the encoded data, by performing one of:
• deleting particular pieces of encoded data corresponding to the color difference data from a data sequence of the encoded data generated through the entropy encoding of each piece of the quantized data;
• and
• replacing the particular pieces of encoded data corresponding to the color difference data with encoded data corresponding to monochrome color difference data,
• wherein after converting each piece of the quantized data via the entropy encoding into the encoded data, allocate the encoded data both to a color data generator configured to generate the compressed color image data and to a monochrome data generator configured to generate the compressed mono chrome image data.