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+.TH jpegqs 1 "08 Apr 2021" "JPEG Quant Smooth"
+.SH NAME
+.B JPEG Quant Smooth
+\- JPEG artifacts removal
+.SH DESCRIPTION
+This program tries to recover the lost precision of DCT coefficients
+based on a quantization table from a JPEG image. The result is saved
+as a JPEG image with quantization set to 1 (like a JPEG saved at 100%
+quality).
+.SH SYNOPSIS
+.B jpegqs
+.IR "" [ options ]
+.I input.jpg
+.I output.jpg
+.SH OPTIONS
+.TP
+.B \-q, \-\-quality n
+Quality setting (0\-6, default is 3)/home/rainbow/Desktop/pngtest/jpegrestore/jpegqs.1
+.TP
+.B \-n, \-\-niter n
+Number of iterations (default is 3)
+.IP
+* More iterations can make the result look like CG art, can make the photos look unnatural.
+.TP
+.B \-t, \-\-threads n
+Set the number of CPU threads to use
+.TP
+.B \-o, \-\-optimize
+Option for libjpeg to produce smaller output file
+.TP
+.B \-v, \-\-verbose n
+Print libjpeg debug output
+.TP
+.B \-i, \-\-info n
+Print quantsmooth debug output (default is 15).
+.RS
+Use the sum of flags:
+.RS
+0 \- silent
+.RE
+.RS
+1/2/4 \- various information
+.RE
+.RS
+8 \- processing time
+.RE
+.RS
+16 \- SIMD type
+.RE
+.PP
+* The processing time includes only the smoothing algorithm, jpeg reading and writing time is not included.
+.RE
+.TP
+.B \-p, \-\-cpu n
+Use to lower the SIMD type if CPU detection fails:
+.RS
+.RS
+0 \- auto
+.RE
+.RS
+1 \- scalar
+.RE
+.RS
+2 \- SSE2
+.RE
+.RS
+3 \- AVX2
+.RE
+.RS
+4 \- AVX512
+.RE
+.PP
+* x86 build selects between modes 1\-3, x86_64 from 2\-4
+.RE
+.SH QUALITY
+.TP
+The quality setting sets a combination of flags for processing:
+.TP
+3. default
+.TP
+4. adds DIAGONALS flag
+smoother diagonal edges, ~1.5 times slower
+.TP
+5. adds JOINT_YUV flag
+chroma channels will depend from luminance, better color consistency
+.TP
+6. adds UPSAMPLE_UV flag
+non-blurring chroma upsampling, unlike fancy upsampling from libjpeg
+.TP
+levels 0\-2 is the same as 4\-6, but with LOW_QUALITY flag
+.RS
+.RE
+~10 times faster, but the quality is lower
+.RS
+.RE
+LOW_QUALITY implies DIAGONALS (always set)
+.SH PROJECT PAGE
+.TP
+https://github.com/ilyakurdyukov/jpeg\-quantsmooth
+.SH COPYRIGHT
+.TP
+Copyright (C) 2016\-2021 Ilya Kurdyukov