5 results about "Standard test image" patented technology

The invention provides a display calibration method, device and equipment, a computer readable storage medium and a computer program product. The method comprises the steps of controlling a head-up display device installed on a target vehicle to project a standard test image to a target display area; the target display area is arranged at a front windshield of the target vehicle; controlling an image acquisition device to perform image acquisition on the standard test image displayed in the target display area to obtain a to-be-analyzed image; performing distortion analysis on the standard test image and the to-be-analyzed image to obtain a first distortion analysis result; and performing distortion correction processing on the head-up display device based on the first distortion analysis result. According to the invention, the efficiency of completing the calibration of the head-up display device and the calibration passing through once on-line of the vehicle can be improved.

This invention relates to the fields of electronic digital data processing, image communication, measurement of electrical variables, printed circuit board testing, high-end chip packaging testing, functional testing, and aging testing, and particularly to an aging test method and system for a camera module main control board. The aging test system reads the board-level test file of the camera module main control board under test and determines the temperature switching hold period; during the temperature switching hold period, it controls the camera module main control board under test to output a standard test image, and collects baseline frame timestamps, baseline image errors, and baseline interface handshake delays; it applies a power ripple step to the camera module main control board under test and records the trigger time; it establishes a disturbance response window with the trigger time as the zero point, and collects frame timestamps, image errors, link reconnection events, and interface handshake delays; it calculates the image link recovery hysteresis and power-image coupling degradation, and outputs the aging test results. This scheme can improve the accuracy of identifying early coupling aging defects in camera module main control boards.

The application discloses an evaluation method for precision of a sub-pixel level edge detection algorithm, comprising the following steps: S1, simulating an edge as a straight line or a curve equation, and recording the straight line or the curve equation as an edge line A; presetting a minimum value G1 and a maximum value G2 of gray scales on two sides of the edge line A; establishing an image coordinate system, and recording a distance from a center of an i-th row and j-th column pixel to the edge line A as d ij ; S2, taking the d ij as an independent variable, taking a gray scale value of each pixel point as a dependent variable, constructing a function model, obtaining the gray scale values of different pixel points in the image, and generating a standard test image; the gray scale values of the different pixel points are between the minimum value G1 and the maximum value G2; S3, detecting the standard test image by using the sub-pixel level edge detection algorithm to be evaluated, and obtaining detection values of each point on the edge line A in a real test image coordinate system; and S4, calculating deviations of the detection values from the edge line A in the standard test image, and taking the deviations as the precision of the sub-pixel level edge detection algorithm to be evaluated. The method can construct an edge conforming to a real scene, and is more practical.

The invention discloses a digital photo frame display intelligent adjusting system based on image content recognition, and relates to the technical field of digital photo frames. The system comprises a panel characteristic twin modeling module which is used for reversely deducing dynamic characteristic parameters of a digital photo frame display panel through comparative analysis of a standard test image and an actual display image and generating a panel characteristic twin model consistent with the real-time state of the display panel; the pixel demand identification module is used for processing a target image currently displayed by the digital photo frame and generating pixel demand matrixes in one-to-one correspondence with the pixel matrixes of the display panel; and the optimization parameter generation module is used for constructing a multi-target optimization function based on the panel characteristic twinborn model and the pixel demand matrix to calculate a target adjustment parameter of each pixel of the display panel. The problems of adjustment failure, panel damage and the like in the prior art are solved, and display experience, hardware protection and economical efficiency are considered.

The invention relates to the technical field of fault detection, in particular to a liquid crystal display screen display fault judgment method and system. The method comprises the following steps: starting a liquid crystal display screen, and inputting a standard test image into the liquid crystal display screen; executing blurred screen fault detection by using the standard test image to identify a blurred screen fault area; calculating a stripe direction gradient according to the blurred screen fault area; calculating a main stripe direction angle by using the stripe direction gradient; dividing the main stripe direction angle into longitudinal blurred screen stripes and transverse blurred screen stripes; recognizing a column driving channel fault by utilizing the longitudinal blurred screen stripes; identifying a line driving channel fault by using the transverse blurred screen stripes; evaluating and displaying a fault level according to the column driving channel fault and the row driving channel fault; and generating a display screen maintenance priority according to the display fault level. Based on a fault detection technology, accurate judgment on the display fault type of the liquid crystal display screen is realized, and the display fault positioning efficiency and the scientificity of maintenance decision are improved.