Ruby 如何解决；tesseract:加载共享库时出错：libpng12.so.0:无法打开共享对象文件：没有这样的文件或目录？

当我在Rails应用程序中使用Heroku 18堆栈处理图像时：

path = File.expand_path('app/assets/images/chicken_adobo_recipe.jpg')
# => "/app/app/assets/images/chicken_adobo_recipe.jpg"
image = RTesseract.new(path)
# => #<RTesseract:0x000055e949fc9120 @source="/app/app/assets/images/chicken_adobo_recipe.jpg", @config=#<RTesseract::Configuration command="tesseract", debug_file="/dev/null">, @errors=[]>
text = image.to_s

为了确保这不仅仅是一个RTesseract gem问题，我运行了以下命令，并且使用tesseract得到了或多或少相同的错误：

heroku run tesseract app/assets/images/chicken_adobo_recipe.jpg public/output

我的问题是：为什么我会遇到这个错误？这个错误意味着什么？还有，如何解决这个错误，以便使用tesseract解析图像中的文本

这是我的Aptfile：

tesseract-ocr
tesseract-ocr-eng

这是我的档案：

source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

ruby '2.6.5'

gem 'rails', '~> 6.0.1'
gem 'puma', '~> 4.1'
gem 'sass-rails', '>= 6'
gem 'webpacker', '~> 4.0'
gem 'turbolinks', '~> 5'
gem 'jbuilder', '~> 2.7'
gem 'bootsnap', '>= 1.4.2', require: false
gem 'haml', '~> 5.0', '>= 5.0.4'
gem 'pg', '1.2.3'
gem 'rtesseract', '3.1'
gem "wkhtmltoimage-binary", "0.12.4"

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
  gem 'awesome_print'
end

group :development do
  # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
  gem 'web-console', '>= 3.3.0'
  gem 'listen', '>= 3.0.5', '< 3.2'
  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'
  gem 'spring-watcher-listen', '~> 2.0.0'
end

group :test do
  # Adds support for Capybara system testing and selenium driver
  gem 'capybara', '>= 2.15'
  gem 'selenium-webdriver'
  # Easy installation and use of web drivers to run system tests with browsers
  gem 'webdrivers'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

源代码'https://rubygems.org'
git|u源（：github）{| repo |“https://github.com/#{repo}.git}
ruby“2.6.5”
gem'rails'，“~>6.0.1”
宝石“彪马”，“~>4.1”
gem'sass rails'，'>=6'
gem'webpacker'，“~>4.0”
gem“涡轮链接”，“大于5”
gem'jbuilder'，“~>2.7”
gem'bootsnap'，'>=1.4.2'，require:false
gem'haml'，“~>5.0'，”>=5.0.4'
gem‘pg’、‘1.2.3’
gem“rtesseract”，“3.1”
gem“WKHTMLOTIMAGE二进制”、“0.12.4”
小组：开发，：测试
#在代码中的任意位置调用“byebug”以停止执行并获得调试器控制台
gem'byebug'，平台：[：mri，：mingw，：x64_mingw]
宝石“绝妙印花”
终止
小组：发展怎么办
#在异常页面上或通过调用代码中的任意位置的“控制台”访问交互式控制台。
gem“web控制台”，“>=3.3.0”
gem'listen'，'>=3.0.5'，'<3.2'
#Spring通过让应用程序在后台运行来加速开发。阅读更多：https://github.com/rails/spring
宝石“春天”
gem‘SpringWatcherListen’，“~>2.0.0”
终止
组：测试do
#增加了对Capybara系统测试和selenium驱动程序的支持
gem‘水豚’，“>=2.15”
gem“selenium webdriver”
#轻松安装和使用web驱动程序以使用浏览器运行系统测试
gem“webdrivers”
终止
#Windows不包括zoneinfo文件，因此捆绑tzinfo数据
gem'tzinfo data'，平台：[:mingw，:mswin，:x64_mingw，:jruby]

好的，我想出来了。为了解决这个问题并继续使用heroku 18堆栈，我必须选择一个heroku，它安装了Tesseract的更新版本——4.0

source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

ruby '2.6.5'

gem 'rails', '~> 6.0.1'
gem 'puma', '~> 4.1'
gem 'sass-rails', '>= 6'
gem 'webpacker', '~> 4.0'
gem 'turbolinks', '~> 5'
gem 'jbuilder', '~> 2.7'
gem 'bootsnap', '>= 1.4.2', require: false
gem 'haml', '~> 5.0', '>= 5.0.4'
gem 'pg', '1.2.3'
gem 'rtesseract', '3.1'
gem "wkhtmltoimage-binary", "0.12.4"

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
  gem 'awesome_print'
end

group :development do
  # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
  gem 'web-console', '>= 3.3.0'
  gem 'listen', '>= 3.0.5', '< 3.2'
  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'
  gem 'spring-watcher-listen', '~> 2.0.0'
end

group :test do
  # Adds support for Capybara system testing and selenium driver
  gem 'capybara', '>= 2.15'
  gem 'selenium-webdriver'
  # Easy installation and use of web drivers to run system tests with browsers
  gem 'webdrivers'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]