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1. Description
In this assignment, you are going to integrate all your previous assignments. To do so, you should follow the following steps.
1. Read command line argumentsa. -c indicates compression and -d indicates decompressionb. input filenamec. output filenamed. quality (0 - 100); no quality argument for decompression
./compress -c girl.pgm output.dat 50./compress -d output.dat output.pgm
2. If compressiona. Open and Read the PGM file b. Divide the data into 8x8 blocks c. Compute DCT coefficients for each block d. Write header to the output file (image-width, image-height, quality, channel, and tag)e. For each blocki. Append the DCT average (round to integer) to the output fileii. Encode the DCT coefficients (a 8x8 block) using 10 bits (K=10) runlength encoding (Assignment 3)iii. Append the encoded data to the output file.f. Repeat step (e) for all 8x8 blocksg. Close the files and release memory3. If decompressiona. Open and Read the compressed fileb. Read the header information and return the file position usingftell(fp)c. For each blocki. Read the DCT averageii. Decode the file and restore the data into a 8x8 block iii. Inverse the DCT coefficient and add the average back to data d. Convert the 8x8 blocks to a single buffer e. Write the buffer back to a PGM file. f. Close the files and release memory
Attachment:- Assignment.rar
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