The resolution of remote sensing camera is restricted by the charge coupled device (CCD) pixel size. To solve the problem, imaging capability of optical system in frequency bandwidth exceeding Nyquist frequency is used to develop a camera which consists of two linear CCDs. These two CCDs are stitched together with a halfpixel width displacement in both directions along and perpendicular to the CCD axis. The principle of improving the resolution of the proposed system is presented. In hipermode, one way interpolation algorithm based on integrated gradients to determine the direction of interpolation is proposed to avoid zipper effect caused by average method. In supermode, high resolution image is acquired in real time by using random access memory (RAM) blocks inside field programmable gate array (FPGA) to regroup image stagger. Gray mean gradients (GMG) of the two high resolution images are increased by factors of 62.5% and 78.3% respectively after using Wiener filter. Results show that the proposed algorithm can make image edge clear and intact. The effect of the algorithm is better than average method and the hardware implementation is easy. The resolution is 1.16 and 1.6 times greater than that of conventional system . Two imaging method can also reduce the image frequency aliasing. Sampling phase staggered technology can take advantage of imaging capability of optical system in high-frequency bandwidth and perform high-resolution imaging.