why does text look different when I copy from my image?

Text looks different when copied from an image due to differences in the CSS font-family fallback chain and subpixel rendering techniques. When an image contains text, it's rendered using the specific font styles present within that image; however, text copied to your computer or device relies on the available system fonts.

The CSS font-family fallback chain is a list of fonts specified in web design to ensure that if one font isn't available, another one will be used instead. This means that if the font used in the image isn't installed on your system, the browser defaults to a general system font, which may not match the original style.

Additionally, subpixel rendering, a technique used to optimize text display on screen, can cause variations in text appearance when zoomed or viewed on different devices. This technique is part of how operating systems like Windows and macOS use font smoothing, affecting how crisp and clear the text looks at different sizes.

To maintain a consistent appearance, consider embedding fonts directly into the document if possible, or using tools like EditTextImage, which can sample font characteristics from the image itself to create a more seamless transition when editing text. However, remember that some font styles may still look different due to inherent rendering differences across platforms.