Seven-color image compression

Quick answer：

Image compression with a seven-color scheme typically refers to a technique where images are compressed using a specific color palette with seven distinct colors. This method is often used in digital imaging to reduce file size while maintaining an acceptable level of visual quality. It is particularly useful for web graphics and low-resolution displays where color depth is not critical. The process involves analyzing the image and reducing the number of colors to the seven predefined shades, which can lead to a simplified, less detailed, yet still recognizable image. This approach is a form of lossy compression, where some image information is discarded to achieve the compression.