Abstract: An image data processing system for a sewing machine wherein data processing is performed after reading an original image pattern to be embroidered by the use of an image input device and producing image data. The image data is subjected to data processing such as noise removal, data compression and data addition. In the present invention, noise removal is performed by referencing surrounding bits of an extracted check bit, and if the surrounding bits are the same color, converting the check bit data to this same color. Data compression is performed by assigning the color of a bit representative of a bit group as either black or white in consideration of the degree of black or white of the original image data and the bit group. Also, if portions of the original image are thinner than a predetermined line width, image processing will automatically correct the image so all portions correspond with an appropriate line width.

Abstract: The present invention stores the image data of an original image pattern read by an image reader in processed data storage means, and stores the calculation formulas for producing designs such as checkers and strip patterns in calculation formula storage means. And, the needle location data of a selected design is generated by substituting the line and column numbers of the image data in the calculation formulas stored in the calculation formula storage means. By this construction, within the image data, embroidering data of the design which is not affected by the visible outline thereof can be formed. In addition, by carrying out the logical AND between the data of the needle locations corresponding to a design and the image data of an original data, embroidering data of the design which is not affected by the visible outline of the image data is formed within the image data.

Abstract: The present invention is an embroidering data production system for reading image data from an original image pattern by means of an image input device and producing embroidering data from the image data, and characterized by comprising an image reader for optically reading the original image pattern to convert it to image data of electrical signals, image data storage means for storing said image data, data processing means for processing said image data, embroidering data conversion means for converting the processed image data to embroidering data, and a RAM card for storing the converted embroidering data. Also, incorporated into the embroidering data conversion means of the embroidering data production system is means for allowing crossover lines occurring between image blocks after the sewing to easily be cut off or to be made unnoticeable, thereby enabling the production of sewing data which causes no degradation in the embroidery pattern quality.