Abstract: An encrypting and decrypting method applied to a system including at least one camera device and a hard disk video decoder includes: transmitting a handshake signal to the camera device which supports an encryption function and has selected the encryption function, wherein the handshake signal includes first identifier information uniquely corresponding to a chip of the hard disk video recorder; receiving the handshake signal; generating a key according to the first identifier information of the hard disk video recorder in the handshake signal and second identifier information uniquely corresponding to a chip of the camera device; encrypting an audio/video file recorded by the camera device according to the key to generate an encrypted audio/video file bitstream; and receiving and decrypting the encrypted audio/video file bitstream.

Abstract: A method and system for authorizing software in an electronic device is provided. The electronic device has a unique identifier (UID) and is connected to a server of the software through a terminal device. The method includes: generating and transmitting at least one section of audio/video data embedded with the UID corresponding to the electronic device to the terminal device; uploading the audio/video data through the terminal device and sending an authorization request to the server of the software; returning authorization audio/video data from the server of the software through the terminal device, wherein the authorization audio/video data includes an authorization key corresponding to the electronic device; and enabling the electronic device to obtain the authorization audio/video data by means of audio/video communication, so as to obtain the authorization key and authorize the software in the electronic device.

Abstract: The present disclosure discloses an image decryption method that includes steps outlined below. Control information in an image stream is read and decrypted. Image stream packets in the image stream are read according to the control information. According to the control information, pixel data of a first reference frame from a first temporary storage block of a memory module and/or of a second reference frame from a second temporary storage block of the memory module are selectively read. A decryption process is performed according to the image stream packets and selectively according to the pixel data of the first and/or the second reference frame to generate pixel data of a decrypted frame. During the decryption process, the pixel data of the decrypted frame is transmitted to a post-processing circuit and is stored to one of the first and the second temporary storage blocks according to the control information.

Abstract: A control method for an image capturing device is disclosed. The image capturing device includes a sensing circuit, an analog gain adjustment circuit using an analog gain, and an analog-to-digital converter (ADC). The control method includes: using a digital gain adjustment circuit to adjust, according to a digital gain, a digital image generated by the ADC to generate an adjusted digital image; generating the analog gain and the digital gain according to the digital image, and calculating intensity information of an infrared component in the digital image; and determining an image adjustment parameter according to the analog gain, the digital gain and the intensity information of the infrared component to perform image processing on the adjusted digital image.

Abstract: The present disclosure discloses a multi-stream image processing method that includes steps outlined below. Image streams that include a main image stream and at least one sub image stream are generated by a former stage circuit, wherein a resolution of the main image stream is higher than the resolution of the sub image stream. Within an image frame processing time period, a N-th sub image frame is stored in a current sub image storage block in a memory module and a N-th main image frame is stored in a current main image storage block in the memory module by the former stage circuit. Within a first sub period of the image frame processing time period, a N?1-th sub image frame is read from a former sub image storage block in the memory module by a latter stage circuit to perform processing. Within a second sub period of the image frame processing time period, the N-th main image frame is read by the latter stage circuit to perform processing.

Abstract: A control method for a storage device of a driving recorder includes: planning a directory entry of a storage device according to a predetermined directory entry stored in a storage unit; planning a file allocation table of the storage device according to a predetermined file allocation table stored in the storage unit; and controlling a controller to write data to the storage device according to the directory entry and the file allocation table.

Abstract: An image stitching method and an image stitching device for stitching a first image and a second image are presented. The image stitching method includes: calculating, according to pixel values of the first image and the second image in an overlapping area, a plurality of costs respectively corresponding to a plurality of positions in the overlapping area; calculating, according to the plurality of costs and relative distances between the plurality of positions, a plurality of forward regularized cumulative costs respectively corresponding to the plurality of positions in the overlapping area; determining a seam in the overlapping area according to the plurality of forward regularized cumulative costs, wherein the seam includes a plurality of stitching positions; and stitching the first image and the second image on the basis of the seam to generate a stitched image.

Abstract: A dual-processor system includes a power supply, a temporary memory, a non-volatile memory and two processors. The non-volatile memory stores an initialization program code, a first configuration file corresponding to a first operating system, and a second configuration file corresponding to a second operating system. Compared to the first operating system, the second operating system has a shorter interrupt latency and a shorter thread switching latency. After the power supply starts to supply power, the first processor executes the initialization program code to perform operations of initializing the temporary memory, loading the second configuration file into the temporary memory, notifying the second processor to fetch the second configuration file from the temporary buffer, loading the first configuration rile into the temporary memory and establishing the first operating system according to the first configuration file.

Abstract: An image processing method includes: performing an equirectangular projection on a first fisheye image and a second fisheye image to obtain a first equirectangular image and a second equirectangular image; swapping positions of a left-half image of the second equirectangular image and a right-half image of the second equirectangular image to obtain a third equirectangular image; rotating the first equirectangular image and the third equirectangular image by 90 degrees in a spherical coordinate system to obtain a first rotated image and a second rotated image; stitching the first rotated image and the second rotated image to obtain a stitched image; and rotating the stitched image by ?90 degrees in the spherical coordinate system to obtain a panoramic image.