From ad38bc6ecb80ddeb562841b33258dd53659b1da6 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=B6rg=20Frings-F=C3=BCrst?= Date: Mon, 24 Aug 2020 18:44:51 +0200 Subject: New upstream version 1.0.31 --- backend/genesys/conv.cpp | 238 ----------------------------------------------- 1 file changed, 238 deletions(-) delete mode 100644 backend/genesys/conv.cpp (limited to 'backend/genesys/conv.cpp') diff --git a/backend/genesys/conv.cpp b/backend/genesys/conv.cpp deleted file mode 100644 index a87c463..0000000 --- a/backend/genesys/conv.cpp +++ /dev/null @@ -1,238 +0,0 @@ -/* sane - Scanner Access Now Easy. - - Copyright (C) 2005, 2006 Pierre Willenbrock - Copyright (C) 2010-2013 Stéphane Voltz - - This file is part of the SANE package. - - This program is free software; you can redistribute it and/or - modify it under the terms of the GNU General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - This program is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, Boston, - MA 02111-1307, USA. - - As a special exception, the authors of SANE give permission for - additional uses of the libraries contained in this release of SANE. - - The exception is that, if you link a SANE library with other files - to produce an executable, this does not by itself cause the - resulting executable to be covered by the GNU General Public - License. Your use of that executable is in no way restricted on - account of linking the SANE library code into it. - - This exception does not, however, invalidate any other reasons why - the executable file might be covered by the GNU General Public - License. - - If you submit changes to SANE to the maintainers to be included in - a subsequent release, you agree by submitting the changes that - those changes may be distributed with this exception intact. - - If you write modifications of your own for SANE, it is your choice - whether to permit this exception to apply to your modifications. - If you do not wish that, delete this exception notice. -*/ - -#define DEBUG_DECLARE_ONLY - -#include "conv.h" -#include "sane/sanei_magic.h" - -namespace genesys { - -/** - * uses the threshold/threshold_curve to control software binarization - * This code was taken from the epjistsu backend by m. allan noah - * @param dev device set up for the scan - * @param src pointer to raw data - * @param dst pointer where to store result - * @param width width of the processed line - * */ -void binarize_line(Genesys_Device* dev, std::uint8_t* src, std::uint8_t* dst, int width) -{ - DBG_HELPER(dbg); - int j, windowX, sum = 0; - int thresh; - int offset, addCol, dropCol; - unsigned char mask; - - int x; - std::uint8_t min, max; - - /* normalize line */ - min = 255; - max = 0; - for (x = 0; x < width; x++) - { - if (src[x] > max) - { - max = src[x]; - } - if (src[x] < min) - { - min = src[x]; - } - } - - /* safeguard against dark or white areas */ - if(min>80) - min=0; - if(max<80) - max=255; - for (x = 0; x < width; x++) - { - src[x] = ((src[x] - min) * 255) / (max - min); - } - - /* ~1mm works best, but the window needs to have odd # of pixels */ - windowX = (6 * dev->settings.xres) / 150; - if (!(windowX % 2)) - windowX++; - - /* second, prefill the sliding sum */ - for (j = 0; j < windowX; j++) - sum += src[j]; - - /* third, walk the input buffer, update the sliding sum, */ - /* determine threshold, output bits */ - for (j = 0; j < width; j++) - { - /* output image location */ - offset = j % 8; - mask = 0x80 >> offset; - thresh = dev->settings.threshold; - - /* move sum/update threshold only if there is a curve */ - if (dev->settings.threshold_curve) - { - addCol = j + windowX / 2; - dropCol = addCol - windowX; - - if (dropCol >= 0 && addCol < width) - { - sum -= src[dropCol]; - sum += src[addCol]; - } - thresh = dev->lineart_lut[sum / windowX]; - } - - /* use average to lookup threshold */ - if (src[j] > thresh) - *dst &= ~mask; /* white */ - else - *dst |= mask; /* black */ - - if (offset == 7) - dst++; - } -} - -/** - * software lineart using data from a 8 bit gray scan. We assume true gray - * or monochrome scan as input. - */ -void genesys_gray_lineart(Genesys_Device* dev, - std::uint8_t* src_data, std::uint8_t* dst_data, - std::size_t pixels, std::size_t lines, std::uint8_t threshold) -{ - DBG_HELPER(dbg); - std::size_t y; - - DBG(DBG_io2, "%s: converting %zu lines of %zu pixels\n", __func__, lines, pixels); - DBG(DBG_io2, "%s: threshold=%d\n", __func__, threshold); - - for (y = 0; y < lines; y++) - { - binarize_line (dev, src_data + y * pixels, dst_data, pixels); - dst_data += pixels / 8; - } -} - -/** Look in image for likely left/right/bottom paper edges, then crop image. - */ -void genesys_crop(Genesys_Scanner* s) -{ - DBG_HELPER(dbg); - Genesys_Device *dev = s->dev; - int top = 0; - int bottom = 0; - int left = 0; - int right = 0; - - // first find edges if any - TIE(sanei_magic_findEdges(&s->params, dev->img_buffer.data(), - dev->settings.xres, dev->settings.yres, - &top, &bottom, &left, &right)); - - DBG (DBG_io, "%s: t:%d b:%d l:%d r:%d\n", __func__, top, bottom, left, - right); - - // now crop the image - TIE(sanei_magic_crop (&(s->params), dev->img_buffer.data(), top, bottom, left, right)); - - /* update counters to new image size */ - dev->total_bytes_to_read = s->params.bytes_per_line * s->params.lines; -} - -/** Look in image for likely upper and left paper edges, then rotate - * image so that upper left corner of paper is upper left of image. - */ -void genesys_deskew(Genesys_Scanner *s, const Genesys_Sensor& sensor) -{ - DBG_HELPER(dbg); - Genesys_Device *dev = s->dev; - - int x = 0, y = 0, bg; - double slope = 0; - - bg=0; - if(s->params.format==SANE_FRAME_GRAY && s->params.depth == 1) - { - bg=0xff; - } - TIE(sanei_magic_findSkew(&s->params, dev->img_buffer.data(), - sensor.optical_res, sensor.optical_res, - &x, &y, &slope)); - - DBG(DBG_info, "%s: slope=%f => %f\n", __func__, slope, slope * 180 / M_PI); - - // rotate image slope is in [-PI/2,PI/2]. Positive values rotate trigonometric direction wise - TIE(sanei_magic_rotate(&s->params, dev->img_buffer.data(), - x, y, slope, bg)); -} - -/** remove lone dots - */ -void genesys_despeck(Genesys_Scanner* s) -{ - DBG_HELPER(dbg); - TIE(sanei_magic_despeck(&s->params, s->dev->img_buffer.data(), s->despeck)); -} - -/** Look if image needs rotation and apply it - * */ -void genesys_derotate(Genesys_Scanner* s) -{ - DBG_HELPER(dbg); - int angle = 0; - - TIE(sanei_magic_findTurn(&s->params, s->dev->img_buffer.data(), - s->resolution, s->resolution, &angle)); - - // apply rotation angle found - TIE(sanei_magic_turn(&s->params, s->dev->img_buffer.data(), angle)); - - // update counters to new image size - s->dev->total_bytes_to_read = s->params.bytes_per_line * s->params.lines; -} - -} // namespace genesys -- cgit v1.2.3