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[Software     name]  ImageSpotDiff Ver.1.4
[Registered   name]  ImageSpotDiff.zip
[Copyright  holder]  A.MORICHIKA m_akira@ka2.so-net.ne.jp
[Compatible models]  Windows 11/10
[Required      DLL]  .NET Framework 4.8.1
[Software     type]  Free software
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[Software introduction]

+ Overview.

 This software is a tool that displays two image files side by side to find the differences.


+ Description of the file.

    <Unzip folder>
    .\ReadMe.txt        : Japanese file.
    .\ReadMe_en.txt     : This file.
    .\ImageSpotDiff.exe : Installer.


+ How to install.

 Please unblock the decompressed file from the file properties.

 Confirm that the extracted configuration is in the above state, and run ImageSpotDiff.exe to start installation.

 To uninstall, go to "Add or Remove Programs" in the Control Panel.
 The program name is "ImageSpotDiff".

 ".NET Framework 4.8.1" is required for operation.
 https://dotnet.microsoft.com/en-us/download/dotnet-framework/thank-you/net481-web-installer


+ Precautions.

 Image files of the same size are easier to compare.

 Supported files have the following extensions: .png .jpeg .gif .bmp.


+ Simple usage instructions.

 When you start the app, the previous image will be displayed. (*1)

 You can change the display magnification with the slider at the bottom right.

 When comparison is enabled, you can find differences by switching between the left and right images.

 The left and right images will be synchronized when you scroll or click. (*2)

 You can open a file by dropping it from Explorer. (*3)

 You can also select "Open" or "Recently Used Files" from the menu.

 The following functions are assigned to the keyboard.

  O: Open a file.
  U: Increase magnification.
  D: Decrease magnification.
  S: Start comparison.
  E: End comparison.
  L: Toggle sync.
  T: Create a SendTo. (*3,*4)

 (*1) A sample image will be displayed the first time.
 (*2) Synchronous and asynchronous modes can be switched.
 (*3) Two files can be specified at the same time.
 (*4) It will be added to the "Send to" right-click menu in Explorer. (You can delete it by pressing the Ctrl key at the same time.)


+ Version history.

    Ver.1.4   2026.8.31

    - The library has been changed from .NET Framework 4.8 to 4.8.1.
    - Rebuilt using Microsoft Visual Studio 2026 Community.

    Ver.1.3   2025.3.3

    - Demo image files are no longer saved in the history.
    - Added theme options: /auto /dark /light.

    Ver.1.2   2024.6.24

    - Improved file history management.

    Ver.1.1   2024.6.15

    - Fixed to maintain display magnification.
    - Added sync/async buttons on the left and right.
    - Images are now displayed in recently used files.
    - You can now change the display magnification using the mouse wheel or keyboard.

    Ver.1.0   2024.6.8

    - First edition released.

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+ Copyright and Disclaimer, etc.

 This software is free software.
 I have the copyright of this program.
 The author assumes no responsibility for any damages or disabilities resulting from the use of this program.
 The author is not obligated to fix bugs or upgrade.
 There are no restrictions on reprinting and distribution by communication and personal handing as long as there are no changes to the contents.

+ Contact information.

    m_akira@ka2.so-net.ne.jp


+ Reference document.

    https://developer.microsoft.com/ja-jp/

    https://docs.microsoft.com/ja-jp/dotnet/framework/wpf/getting-started/walkthrough-my-first-wpf-desktop-application

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Windows 10/11 is a registered trademark or trademark of Microsoft Corporation in the United States and other countries.

