Lines Matching refs:DCT

47 	Really raw data: DCT coefficients
826 	in future IJG releases as more is learned about DCT quantization.
842 	conforming to the Adobe PostScript DCT conventions, but we do not
877 	Selects the algorithm used for the DCT step.  Choices are:
1131 	Selects the algorithm used for the DCT step.  Choices are the same
1748 When scan_info is not NULL, the compression library will store DCT'd data
2012   For example, one could use a fast DCT method for early scans, changing
2497 the last column and/or row).  The data must be padded to a multiple of a DCT
2501 images, the standard image size is usually a multiple of the DCT block size,
2538 factors and image sizes, additional dummy DCT blocks are inserted to make
2555 MCU height is max_v_samp_factor = 2 DCT rows so you must pass at least 16
2558 so you must pass a total of 7*16 = 112 "scanlines".  The last DCT block row
2584 enough to hold the actual data plus padding to DCT-block boundaries.  As with
2585 compression, any entirely dummy DCT blocks are not processed so you need not
2595 Really raw data: DCT coefficients
2598 It is possible to read or write the contents of a JPEG file as raw DCT
2604 To read the contents of a JPEG file as DCT coefficients, open the file and do
2617 DCT blocks containing real data; any entirely-dummy blocks added to fill out
2642 To write the contents of a JPEG file as DCT coefficients, you must provide
2643 the DCT coefficients stored in virtual block arrays.  You can either pass
2666 When writing raw DCT coefficients, it is crucial that the JPEG quantization
2828  3. A full-image DCT coefficient buffer is needed to decode a multi-scan JPEG
2851 for color quantization.  Also, it needs a full-image DCT coefficient buffer
2864 The JPEG standard provides for both the baseline 8-bit DCT process and
2865 a 12-bit DCT process.  The IJG code supports 12-bit lossy JPEG if you define
2882 You may also want to supply your own DCT quantization tables; the existing