Circuit Apparatus, Electronic Instrument, And Error Detection Method

A circuit apparatus comprising:

• an image acquisition circuit that acquires a display image;
• an error detection circuit that determines an indicator representing a degree of agreement between a foreground image that is an image of a given area of the display image and a reference image that serves as a reference for the foreground image based on pixel values of the display image and pixel values of the reference image or based on pixel values of an edge image of the display image and pixel values of an edge image of the reference image, the error detection circuit performing error detection on the display image based on the indicator;
• and
• a search circuit,
• wherein the search circuit searches the display image for a display position of the foreground image based on the reference image, and
• the error detection circuit performs the error detection based on the display position searched for by the search circuit.

An error detection method comprising:

• searching a display image for a display position of a foreground image that is an image of a given area of the display image based on a reference image that serves as a reference for the foreground image;
• determining histograms of pixel values of the display image based on the display position searched for;
• performing correlation operation using the histograms;
• determining an indicator representing a degree of dissimilarity between the foreground image and a background image corresponding to a background of the foreground image based on a result of the correlation operation;
• and
• performing error detection on the display image based on the indicator.