Abstract: The present invention provides a full-screen display method for an upright image that includes the following steps: reading the resolution of the second image, the resolution of the second image is a:b; extracting from the said second image to generate the third image, the resolution of the third image is b:a; the center line of the second image and of the third image coincide in both the horizontal and vertical directions; the number of pixels of the second image in the vertical direction is the same as that of the third image in the vertical direction; rotating the third image by 90 degrees along the set direction generates the fourth image; and finally displaying the fourth image full-screen on the said display device. The present invention also provides the mirroring same-screen device, the display device, the full-screen display system for upright images, and the computer readable storage medium to perform the previous steps of the full-screen display method for upright images.

Abstract: The present invention provides a full-screen display method for an upright image that includes the following steps: reading the resolution of the second image, the resolution of the second image is a:b; extracting from the said second image to generate the third image, the resolution of the third image is b:a; the center line of the second image and of the third image coincide in both the horizontal and vertical directions; the number of pixels of the second image in the vertical direction is the same as that of the third image in the vertical direction; rotating the third image by 90 degrees along the set direction generates the fourth image; and finally displaying the fourth image full-screen on the said display device. The present invention also provides the mirroring same-screen device, the display device, the full-screen display system for upright images, and the computer readable storage medium to perform the previous steps of the full-screen display method for upright images.