Projection system, information processing apparatus

A projection system comprising:

• an information processing apparatus that carries out image processing on an input image source;
• a projector that projects an image on a screen based on an image data signal outputted from the information processing apparatus;
• and
• a signal transmission unit that carries signals between the information processing apparatus and the projector,
• wherein the information processing apparatus includes:
• a shape conversion unit that generates shape-converted image data converted such that the image data is properly represented on the screen when the image data is projected from the projector towards the screen;
• a modified-part detection unit that compares latest shape-converted image data, which is shape-converted by the shape conversion unit, with preceding shape-converted image data, and detects, as a modified part, part of the latest shape-converted image data that is modified from the preceding shape-converted image data, the preceding shape-converted image data being generated based on a first image data which represents a first image to be displayed, the latest shape-converted image data being generated based on a second image data which represents a second image to be displayed and the second image being displayed after the first image is displayed;
• a modified-image data generation unit that generates modified-image data of the modified part by adding color information to each pixel in the modified part detected by the modified-part detection unit;
• a current-image generation unit that generates latest current-image data including the modified-image data generated by the modified-image data generation unit;
• and
• an image preservation unit that preserves image data generated by the current-image generation unit,
• wherein the modified-part detection unit compares latest shape-converted image data, which is shape-converted by the shape conversion unit, with preceding image data, which is preserved in the image preservation unit, and detects, as a modified part, part of the latest shape-converted image data that is modified from the preceding shape-converted image data.

An information processing apparatus performing image processing on an input image source, outputting and displaying the image-processed image source on a projector connected via a signal transmission unit, the information processing apparatus comprising:

• a shape conversion unit that generates shape-converted image data converted such that the image data is properly represented on the screen when the image data is projected from the projector towards the screen;
• a converted-image preservation unit that preserves the shape-converted image data that is shape-converted by the shape conversion unit;
• a modified-part detection unit that compares latest shape-converted image data, which is shape-converted by the shape conversion unit, with preceding shape-converted image data, which is preserved in the converted-image preservation unit, and detects, as a modified part, part of the latest shape-converted image data that is modified from the preceding shape-converted image data, the preceding shape-converted image data being generated based on a first image data which represents a first image to be displayed, the latest shape-converted image data being generated based on a second image data which represents a second image to be displayed and the second image being displayed after the first image is displayed;
• and
• a modified-image data generation unit that generates the modified-image data of the modified part by adding color-tone data to each pixel in the modified part detected by the modified-part detection unit.