86 lines
3.1 KiB
C
86 lines
3.1 KiB
C
/*
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* Copyright (C) 2007-2008 Daniel Drake <dsd@gentoo.org>
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* Copyright (C) 2018 Bastien Nocera <hadess@hadess.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __FPI_IMG_H__
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#define __FPI_IMG_H__
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#include <stdint.h>
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struct fp_minutiae;
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/**
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* FpiImgFlags:
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* @FP_IMG_V_FLIPPED: the image is vertically flipped
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* @FP_IMG_H_FLIPPED: the image is horizontally flipped
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* @FP_IMG_COLORS_INVERTED: the colours are inverted
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* @FP_IMG_BINARIZED_FORM: binarised image, see fp_img_binarize()
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* @FP_IMG_PARTIAL: the image is partial, useful for driver to keep track
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* of incomplete captures
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*
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* Flags used in the #fp_img structure to describe the image contained
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* into the structure. Note that a number of functions will refuse to
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* handle images which haven't been standardised through fp_img_standardize()
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* (meaning the @FP_IMG_V_FLIPPED, @FP_IMG_H_FLIPPED and @FP_IMG_COLORS_INVERTED
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* should all be unset when the image needs to be analysed).
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*/
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typedef enum {
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FP_IMG_V_FLIPPED = 1 << 0,
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FP_IMG_H_FLIPPED = 1 << 1,
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FP_IMG_COLORS_INVERTED = 1 << 2,
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FP_IMG_BINARIZED_FORM = 1 << 3,
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FP_IMG_PARTIAL = 1 << 4
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} FpiImgFlags;
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/**
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* fp_img:
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* @width: the width of the image
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* @height: the height of the image
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* @length: the length of the data associated with the image
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* @flags: @FpiImgFlags flags describing the image contained in the structure
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* @minutiae: an opaque structure representing the detected minutiae
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* @binarized: the binarized image data
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* @data: the start of the image data, which will be of @length size.
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*
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* A structure representing a captured, or processed image. The @flags member
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* will show its current state, including whether whether the binarized form
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* if present, whether it is complete, and whether it needs particular changes
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* before being processed.
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*/
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struct fp_img {
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int width;
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int height;
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size_t length;
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FpiImgFlags flags;
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/*< private >*/
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struct fp_minutiae *minutiae;
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/*< public >*/
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unsigned char *binarized;
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unsigned char data[0];
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};
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struct fp_img *fpi_img_new(size_t length);
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struct fp_img *fpi_img_new_for_imgdev(struct fp_img_dev *imgdev);
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struct fp_img *fpi_img_realloc(struct fp_img *img, size_t newsize);
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struct fp_img *fpi_img_resize(struct fp_img *img, unsigned int w_factor, unsigned int h_factor);
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int fpi_std_sq_dev(const unsigned char *buf, int size);
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int fpi_mean_sq_diff_norm(unsigned char *buf1, unsigned char *buf2, int size);
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#endif
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