Screenshot OCR

Apply OCR or Reverse Image Search to Real-Time Screenshot in a Single Key Pressing and a Mouse Dragging.

Warnings

Make sure to make yourself informed the warnings below before kicking off.

• Screenshots within the red rectangle are sent to a third-party website to do OCR processing. No privacy guarantee.
• BUGs may occasionally occur, which might mistaken the range of the red rectangle leading to an extra screenshot sending. No privacy guarantee for your computer's full-size screenshot.
• Your IP address may be exposed to the screenshots receiving websites (servers).
• Your screenshot and your IP address might be used in analysis use to the receiving websites (servers).
• Chances are, though little, files downloaded from the download link might be swapped. No file integrity guarantee.
• some POST links are using unsafe HTTP Communications Protocol, rather than HTTPs.

Introduction to Different APIs

• A9T9 can identify as many as 25 languages;
• Sogou OCR API has a better recognition for English and Chinese but with size restriction for uploaded image; sizing problem solved;
• SauceNAO includes uploaded files storage and redirection to other image reverse search engine. This source is not stable.

Prerequisite

• Windows system
• Install Microsoft .NET Framework 4.5 OR(maybe) higher version
• (Optional) Register an API key

How to use

For Screenshot OCR Now

1. Run executive file;
2. Press F4 when you need to convert letters on the screen to editable with OCR;
3. Press F4 again or right click to undo;
4. Drag a rectangle to select the letters-contained region while pressing left key;
5. Wait for a yellow message box to pop up. The recognized letters shown in the box are in your clipboard;
6. Double click the message box to copy them again, right click to close it;
7. Go to step 2.

Hint: In screenshot mode, press Ctrl while left click to re-capture the previous region.

For Image Reverse Search

• Goto settings and choose SauceNAO mode.

For Uploading Images

1. Right click the tray icon;
2. Left click "Upload" item;
3. Choose an image to upload;
4. Wait for a message box to pop up after clicking "OK". Clipboard updates at the same time;
5. Click "OK" to copy them again, "Cancel" to close the message box.

Hint: API that is used is based on the mode you chose at settings.

For Settings

1. Right click tray icon to list out menu and click "Settings"; or simply left click the icon;
2. All settings save after the option "Exit" in the menu is clicked.

Note

WPF Window Overview

Window_Lifetime_Events

ActualWidth and ActualHeight Updating Lag of TextBlock

Reasons

• The process cycle
• Calculation of Double

Solution

Data Binding

Model-View Binding

Appreciation

• 天若OCR文字识别工具 - Source of Inspiration;
• Free-OCR-API - Free OCR API;
• Sogou API for OCR - High Quality OCR API without Documentation;
• SauceNAO - an image reverse search site and also an image host;
• icon8 - Free Icons site;
• ConvertICO - site for Converting PNG to ICO;
• Kelly - a pro giving me technical advice;
• and authors whose original code is at the website whose links were written between my codes.

TODO

• Add Sogou API for OCR(link here with documentation is different from the former one)
• Add a Search-by-Image feature. Redirect from SauceNAO
• Allow hotkey customization.
• Fix BUG: pressing Alt + F4 kills the program though it does not activated.
• Break limitation for minimum image size by Sogou API
• Perfect UI
• fix resolution issue in some desktops
• Auto fixs the grammar mistakes on OCR results
  • https://textgears.com/api/
  • https://www.afterthedeadline.com/api.slp
  • https://docs.microsoft.com/en-us/windows/desktop/intl/about-the-spell-checker-api
  • https://stackoverflow.com/a/38128912/9920172
• Add feature: Notes Display
• Adapt MVC pattern
• Replace the draw board from Winform to WPF
• Reduce startup flickering