Device, method and storage medium for processing image data and creating embroidery data

1. Field of Invention The invention provides an image processing device and method to simplify the operations in processing image data of an original color picture. In the case of creating embroidery data using the embroidery data generation device, or the programs stored in the storage medium according to the invention, the image data of an original color picture is first retrieved by an image scanner. Then, the number of colors in the image data is reduced, thereby converting the original picture into image planes. If necessary, a plurality of image planes are combined into one. The image planes are edited and revised, and later, formed into a composite image to be displayed. Finally, the image data of each image plane is processed for creating embroidery data. According to the invention, when an image plane is edited, the other image planes are automatically revised in correspondence with the preceding edit. Therefore, the operations in processing image data and creating embroidery data are simplified, and which leads to a savings of time and labor.