Disclosed are a method and device for transmitting image data, a storage medium, and a processor. The method comprises: segmenting a target image into multiple regional images having different resolutions, wherein the target image comprises a first regional image and a second regional image, the first regional image is an image in a region on which a gaze point falls, and the second regional image is a regional image other than the first regional image in the target image; and transmitting header information of the multiple regional images and pixel values of respective pixels in the respective regional images. The present invention solves a technical problem in which since image data in multiple formats are transmitted in practice and each image data transmitting apparatus can only transmit image data in a certain format, such format limitation results in poor compatibility between image data transmitting apparatuses.