Method one. Use Corel PHOTO-PAINT tool, which is a bitmap processing tool similar to Photoshop.

Method 2: Edit the bitmap directly with CorelDraw's shape tool. It is to use the shaping tool to pick up the bitmap, and to shape the outer contour of the bitmap by adding or deleting nodes and bending nodes to remove the basemap. This is more convenient for relatively simple diagrams.

Method 3: Use bitmap color mask. The color mask tool in the filter, adjust an appropriate extension, click the background color to be removed, and click Apply, which can also remove the relatively monotonous background color map, which is good for transparency. Those who can PS directly use PS to generate PSD transparent background image.

Method 4: Use the function of image (placed in container). According to the outer contour of the middle image, draw the contour map with pencil or shell magnetism, and then cut the image with the image and frame precision cutting tool.

Method 5: Use the material function of the interactive transparency tool.