Post by thread:[OT]: Wauy lines

Hi all, A friend asked me for help with OSD monitor. One of the setings is explained in the manual that it "Reduces the optical effect of wauy lines on the display image". And he says "When I exercise this setting from one end-stop to the other there is first visible the (internal) mask stucture on the screen, it starts to disappear as I go further, then the image becomes blurry and ends up shaking. My first thought was that wauy is a typo and should be wavy, but the described behaviour does not correspond with this explanation (or maybe he didn't have the right test picture?). Anyone has a clue how this control works and what it is supposed to do? Josef -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

Hi Josef, Perhaps it is a "Moire" pattern adjuster.. basically when you get stipple patterns (alternating light and dark checkerboards like in a windows scroll bar), some times this overlays onto the internal pixel mask of the monitor and results in an optical effect that can produce "wavy colours and lines". This is difficult to explain.. and I think that is how it works. If you're using the standard (grey) windows colour set, it is most apparent in the scroll bar.. try adjusting it when looking at a scroll bar. Cheers, Ash (who spends about 10 minutes setting up a new monitor to be "perfect") :) > {Original Message removed}

This is 'moire' control. It eliminates optical 'beat' frequencies between the shadow mask and the incoming pixels. Not sure how it works. The 'wauy' / 'wavy' does make some sense. You can see a low tech version of this by looking thru two stacked pieces of window screening and rotating one piece a few degrees relative to the other, and then shifting it around. Bob Ammerman RAm Systems (contract development of high performance, high function, low-level software) {Original Message removed}

Here's an excellent freeware Philips Test Pattern Generator. I've used it a few times and passed it on to friends who use it professionally http://www.dc.comp.philips.com/pattern/ The original instruction page seems to be gone but the files are still there (3MB total). I have the original page saved - ======================================= Philips Display Components introduces its test pattern generator software for widescreen computer monitors. Suitable also for standard format (4:3) monitors, the new software allows advanced PC users to test various imaging properties. Thirty pre-defined patterns are available and users can even create their own patterns. Patterns can also be combined for advanced testing Installation procedure - After downloading the disks, place them into one folder In the File Manager (Windows 3.11) or Windows Explorer select the proper folder and double-click disk1.exe Repeat this step for disk2.exe and disk3.exe All files are extracted to the folder Double-click setup.exe and follow the instructions on screen. If you have problems installing, click Help on any setup screen. After installing the test pattern generator software, you can remove the downloaded files (disk1.exe, disk2.exe and disk3.exe) to save diskspace -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics