Resources Contact Us Home
Bit map image processing apparatus having hardware window function

Image Number 4 for United States Patent #4933877.

A bit map image processing apparatus includes a window detector for detecting a window position on a screen and a frame memory for storing image data. The frame memory has p 2-port memories each having an l bits.times.m (column).times.n (row) memory area. Each row of the two-dimensional memory area of the frame memory is divided and managed in units of l.multidot.p bits. The apparatus further has a first multiplexer for selecting as a read memory address one of a background memory address and a window memory address in accordance with a detection result of the window detector, a second multiplexer for selecting as a memory address one of read address output from the first multiplexer and a write address input thereto in accordance with the detection result of the window detector, an address converter for converting the memory address output from the second multiplexer into individual memory addresses for each 2-port memory, and a shift register section for converting into serial data the image data output in units of l bits from the p 2-port memories in accordance with the individual memory addresses.

  Recently Added Patents
Bullet lens design for the dasal seeker
Pet fish burial pod
Methods and apparatuses for anti-shading correction with extended color correlated temperature dependency
Wireless refrigerant scale platform
Control unit of a ride level control system, and ride level control system
Method of forming an isolation structure
  Randomly Featured Patents
Fireplace draft control damper
Signet ring cell detector and related methods
Field operated cane cleaning apparatus
Free falling cinch tongue
High aspect ratio fill method and resulting structure
Electrolytic filter for electrolytically filtering and recovering metals from colloidal suspensions
Access control apparatus
Force measuring cell
Magnetostrictive linear displacement transducer having preselected zero crossing detector
Triglyceride-lowering agent and hyperinsulinism-ameliorating agent