OCR is the conversion of text from images into document text that you can edit, and there are some OCR software with which you can extract or copy text from saved images. Alternatively, you can extract text from website images with the Copyfish Free OCR Software Google Chrome extension. With this extension, you can copy and paste text from a page image into word processors.
First, open the Copyfish extension page to add it to Google Chrome. Note that this extension is also available for the Opera browser. Then you will find a Copyfish button in the snapshot below on the Chrome toolbar.
Next, find a website page image with text on it. I've added a suitable image below for you to try out the extension with.
Press the Copyfish toolbar button, then hold down the left mouse button and drag the mouse. Then you can expand a box around the text in the image as shown below. Expand the box to include all the text you need to copy, then release the button.
When you release the mouse button, the Copyfish window below opens at the bottom right of the browser. It shows you the OCR text that should match what you selected to copy into the image. Press the Copy to Clipboard button to copy the text. Then you can paste it into a text editor with the keyboard shortcut Ctrl + V.
For more options, right-click the Copyfish icon in the toolbar and select Options. This will open the tab below from where you can configure the translation if needed. For example, if the image includes German, you must select it from the Input language drop-down menu. Then the extension can translate German to English.
Copyfish also works for videos on websites. Find a suitable video with subtitles to try it out. Then pause the video when it contains subtitle text.
All in all, Copyfish can be a handy extension to have on your Chrome toolbar. With it, you can now copy and translate text over images and videos, which don't always translate with the rest of the page.