Color Compensation Using Digital Reference Charts

The patent replaces physical hardcopy reference color charts with digital reference color chart data stored in memory. The scanner captures images of color charts, and the processor compares these images against digital reference data to determine color compensation values, eliminating the need for users to possess and maintain physical reference charts while preserving color measurement accuracy.

The patent replaces the mechanical/optical measurement system (colorimeter) with an imaging system (scanner) combined with digital image processing. Instead of using specialized colorimetric sensors, the system uses standard scanning technology to capture color information and processes it through algorithms to achieve color compensation, thereby reducing device complexity and cost.

The patent creates digital copies of reference color chart data and stores them in the image forming apparatus's memory. These digital references replace physical hardcopy charts, eliminating the risks of loss, damage, or contamination associated with physical materials while maintaining continuous availability of color reference data for compensation operations.

The patent introduces digital data as an intermediary between the physical color chart and the compensation process. The scanner captures images of color charts, converts them to digital data, and stores this information for repeated use without requiring the original physical chart to remain intact or accessible, thereby protecting against harmful factors affecting physical materials.

The patent makes the image forming apparatus itself multi-functional by integrating both scanning and color compensation capabilities into a single device. The scanner, already present for document scanning, is also used to capture color chart images, and the built-in processor performs color analysis and compensation. This eliminates the need for separate professional colorimeter equipment and complex control software, making color compensation accessible to general consumers through the device's existing functions.

The patent enables the image forming apparatus to perform color compensation autonomously using its own built-in scanner and processor. The device automatically captures color chart images, compares them against digital references, calculates compensation values, and applies corrections without requiring external professional equipment or complex user intervention, thereby significantly improving ease of operation while maintaining measurement accuracy.