Resources Contact Us Home
Method and apparatus for forming high contrast image in imaging system

Image Number 3 for United States Patent #6452631.

The present invention improves the contrast of the image signal before further adjustment by the principle of superposition of the optical-transferring system. There are two ways to carry out the principle of superposition one is in space domain, the other is in frequency domain. Each of them can be implemented by the system or method of the present invention. To implement the compensation in space domain, the present invention utilize the result of scanning the correction board to compensate the optical energy scattered by the optical-transferring system. A pixel in object space can be expressed in terms of the linear combination of the corresponding pixels in image space according to the principle of superposition. Thus is obtained by extracting the coefficients of the linear combination. The pixels of desired picture in image space is multiplied by the compensation vector and the image with sharp contrast is produced by the present invention in space domain. To implement the compensation in frequency domain, the present invention get the result of scanning the correction board and transform it to frequency form. Thus the compensation vector is obtained by extracting the amplitude and phase angle of the frequency form of the result of scanning the correction board. Transform the result of scanning the desired picture into frequency form, followed by dividing it by the compensation vector. The desired picture in frequency form is obtained. Taking the inverse transform of the desired picture, which is in frequency form, the result is transformed in space domain and can be processed or displayed with sharp contrast.

  Recently Added Patents
Piperazinyl methyl phenyl cyclohexane compound
System and method for operating an electric power converter
Calibration method for non-ideal transceivers
Polyfunctional sulfur-containing epoxies and compositions thereof
Extension of physical downlink control channel coverage
Systems and methods for cryopreservation of cells
Fast carrier allocation in multi-carrier systems
  Randomly Featured Patents
Device and method for arranging block of vessel
Hot beverage maker with cup-actuated dispenser
Peelable composite thermoplastic sealants in packaging films
Method, system, and program for processing complexes to access shared devices
LAN-WAN-LAN communication method, and apparatus for LAN-WAN connection
Product package
Online video and audio editing
Process for reinforcing soil structure
Flexible face non-clogging actuator assembly
Golf club shaft