使用自动拼图工具gaps进行自动拼图

WriteUp 2个月前 admin
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拼图在手动的情况下还是有很多限制,以这一题为例,共计600张图片。

使用自动拼图工具gaps进行自动拼图

图片名称没有任何规律。如果手动拼图的话,总的尝试次数会非常大,而且非常耗时,所以需要依赖自动拼图的工具

图片拼接

首先需要将图片全部拼接到一张图片中,并且获取每张图片的尺寸,每张图的尺寸为40×40

使用自动拼图工具gaps进行自动拼图

因为共计600张图片,所以猜测总图片应该是20×30的数量排列
安装montage
apt-get install -y graphicsmagick-imagemagick-compat
montage拼接图片
montage
GraphicsMagick 1.3.28 2018-01-20 Q16 http://www.GraphicsMagick.org/
Copyright (C) 2002-2018 GraphicsMagick Group.
Additional copyrights and licenses apply to this software.
See http://www.GraphicsMagick.org/www/Copyright.html for details.
Usage: montage montage [options ...] file [ [options ...] file ...]

Where options include:
-adjoin join images into a single multi-image file
-affine matrix affine transform matrix
-authenticate value decrypt image with this password
-background color background color
-blue-primary point chomaticity blue primary point
-blur factor apply a filter to blur the image
-bordercolor color border color
-borderwidth geometry
border width
-colors value preferred number of colors in the image
-colorspace type alternate image colorsapce
-comment string annotate image with comment
-compose operator composite operator
-compress type image compression type
-crop geometry preferred size and location of the cropped image
-debug events display copious debugging information
-define values Coder/decoder specific options
-density geometry horizontal and vertical density of the image
-depth value image depth
-display server query font from this X server
-dispose method Undefined, None, Background, Previous
-dither apply Floyd/Steinberg error diffusion to image
-draw string annotate the image with a graphic primitive
-encoding type text encoding type
-endian type multibyte word order (LSB, MSB, or Native)
-fill color color to use when filling a graphic primitive
-filter type use this filter when resizing an image
-flip flip image in the vertical direction
-flop flop image in the horizontal direction
-font name font to use when annotating with text
-format string output formatted image characteristics
-frame geometry surround image with an ornamental border
-gamma value level of gamma correction
-geometry geometry preferred tile and border sizes
-gravity direction which direction to gravitate towards
-green-primary point chomaticity green primary point
-help print program options
-interlace type None, Line, Plane, or Partition
-label name assign a label to an image
-limit type value Disk, File, Map, Memory, Pixels, Width, Height or
Threads resource limit
-log format format of debugging information
-matte store matte channel if the image has one
-mattecolor color color to be used with the -frame option
-mode type Frame, Unframe, or Concatenate
-monitor show progress indication
-monochrome transform image to black and white
-noop do not apply options to image
+page reset current page offsets to default
-page geometry size and location of an image canvas
-pointsize value font point size
-quality value JPEG/MIFF/PNG compression level
-red-primary point chomaticity red primary point
+repage reset current page offsets to default
-repage geometry adjust current page offsets by geometry
-resize geometry resize the image
-rotate degrees apply Paeth rotation to the image
-sampling-factor HxV[,...]
horizontal and vertical sampling factors
-scenes range image scene range
-set attribute value set image attribute
+set attribute unset image attribute
-shadow add a shadow beneath a tile to simulate depth
-sharpen geometry sharpen the image
-size geometry width and height of image
-strip strip all profiles and text attributes from image
-stroke color color to use when stroking a graphic primitive
-strokewidth value stroke (line) width
-texture filename name of texture to tile onto the image background
-thumbnail geometry resize the image (optimized for thumbnails)
-tile geometry number of tiles per row and column
-title string thumbnail title
-transform affine transform image
-transparent color make this color transparent within the image
-treedepth value color tree depth
-trim trim image edges
-type type image type
-verbose print detailed information about the image
-version print version information
-virtual-pixel method
Constant, Edge, Mirror, or Tile
-white-point point chomaticity white point

In addition to those listed above, you can specify these standard X
resources as command line options: -background, -bordercolor,
-borderwidth, -font, -mattecolor, or -title

By default, the image format of `file' is determined by its magic
number. To specify a particular image format, precede the filename
with an image format name and a colon (i.e. ps:image) or specify the
image type as the filename suffix (i.e. image.ps). Specify 'file' as
'-' for standard input or output.
montage montage: Improper arguments supplied, please see manual.
常规命令只需要用到tile和geometry两个参数就可以。
tile是拼成的大小,geometry为图片之间的缝隙大小。
montage ./files/*.png -tile 20X30 -geometry +0+0 flag.png
拼接完的效果

使用自动拼图工具gaps进行自动拼图


拼图调整

然后安装gaps自动拼图工具。
首先安装poetry:
curl -sSL https://install.python-poetry.org | python3 -

安装gaps:

sudo apt-get install python-tk
git clone https://github.com/nemanja-m/gaps
cd gaps
pip install . -i https://pypi.tuna.tsinghua.edu.cn/simple
Usage: gaps run [OPTIONS] PUZZLE SOLUTION

Run puzzle solver.

PUZZLE is the input puzzle image with square pieces.
SOLUTION is the output image file for solved puzzle.

Examples:

$ gaps run puzzle.jpg solution.jpg --size=32 --generations=100
--population=1000

Options:
-s, --size INTEGER Size of single square puzzle piece in pixels.
Autodetected if not specified.
-g, --generations INTEGER The number of generations for genetic algorithm.
[default: 20]
-p, --population INTEGER The size of the initial population for genetic
algorithm. [default: 200]
-d, --debug If enabled, shows the best individual after each
generation.
-h, --help Show this message and exit.

运行gaps

gaps run ./flag.png resolve.png --generations=20 --population=200 --size=40
使用自动拼图工具gaps进行自动拼图
可以看出图片的尺寸应该是30×20,调整后再运行一次
montage ./files/*.png -tile 30X20 -geometry +0+0 flag.png  
gaps run ./flag.png resolve.png --generations=20 --population=200 --size=40
使用自动拼图工具gaps进行自动拼图
图片还是有部分没有修改完成,修改gaps的参数,增加迭代
gaps run ./flag.png resolve.png --generations=400 --population=400 --size=40

运行完成后,可以看到,虽然图片边缘的处理还有些问题,但是图片主要的内容都已经显示出来了

使用自动拼图工具gaps进行自动拼图

原文始发于微信公众号(山石网科安全技术研究院):使用自动拼图工具gaps进行自动拼图

版权声明:admin 发表于 2024年2月20日 上午10:44。
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