JPEG Wierdness

High res.......what is your buffer memory set at?

I have no idea. These aren't super huge files - 3000 x 2400. Where would one find this buffer memory setting?

bhankiii

this sounds stupidly simple, but the manual would state how to page to the menu on the printer. This is usually how HP had done it in the past. Had something simuliar, but it was about 10 years ago.....things should have improved.

but I had problems finding it, in the manual it was'nt were it should be.

Earlier printer/plotters your would have to install extra memory. and also were able to set the memory allocations.

They could have improved on how it is done by using the slave computer to buffer the printer is connected to. I'll have to look online for at the manual.

I'll try to do it today........if you did'nt solve it already.

I'll be back.....

I searched the manual for "buffer" and found no reference to buffer memory.

Thanks

Many of NASA's images are created from lots of small photographs stitched together. It's possible that you are seeing the edges of these individual photos.

Post links to the files so we can see for ourselves.

nope -these are artist renderings of new spacecraft, not space pictures. And like I said earlier, I can zoom into see the individual pixels and there's nothing there in the image, only when I print.

What application are you using to view and print the images?

I cropped and resized the images in PaintShopPro, then printed them from the Microsoft Office Picture Manager.

You have found evidence that we really didn't go to the moon, and the images have been falsified!

what application are you using to print with? I suggest the spooling algorighm is to blame... photoshop?

I cropped and resized the images in PaintShopPro, then printed them from the Microsoft Office Picture Manager.

On many cameras used in the Apollo and Gemini programs, there was a fine "mesh" built into the optics.

Maybe the artist is simulating these types of pictures?

Surely its easy to see if they are regular squares or not? Your CRT may not have the resolution unless you zoom in a long way, did you try doing that?

They are horizontal lines, they are not meant to be part of the image, and don't show up on the image at any level of zoom.

Any possibility there is some kind of weird Moire pattern going on? Or, JPEG artifacts? I've seen Moire issues on my home printer, depending on the resolution of the JPEG, and how the image was created or scanned.

The old image editing software I use (Paint Shop Pro) has utilities to address both of these issues.

Just a guess.........

Tom

No, I don't think so. I believe I tried printing it as a bmp also, with the same results.

Here's one of the images:

http://www.nasa.gov/images/content/156336main_Orion_lunar_orbit.jpg

This one I did nothing to, just straight from the website and printed out from the Microsoft Office Picture Manager. I used high quality heavy plotter paper, and set the printer dialog box to match the paper, and selected photo quality.

When I print this in "C" size I get lines spaces 2 inches apart across the smaller dimension - which would be top to bottom in this picture, but left to right when printed since I printed it side ways. The lines appear to be areas of lessened image - not completely white. The intensity of the lines varies across the image, and the variations in the lines are exactly consisted from print to print. The lines are very fine - maybe 5 - 10 mils wide.

I'm thinking it is the inkjet printer... if you rotate the image and print you would get the same problem. I think I've seen it before, but it was always a letter size inkjet print for me and didn't matter so I never thought to try an correct it.

:(

Chris

The picture is in bitmap form. Open it again in photoshop and save it as a jpg. Open again and magnify to see whether the lines were put there as a copyrite.

Keep in mind some graphics have code embedded that does not allow them to be printed.

The lines are invisible in both the bmp and jpg images. I'm assuming that there is some sort of embedded code in the files that inserts the lines during printing. That's what I'm trying to discover here.

It's like an invisible watermark. I ran into likewise trying to print some Hubble imagery.

Must be a way around it. I wonder how one would to get into the images 'properties' ...???

I'll print it out later today and see what happens

Thanks to you if you can solve the riddle. It's odd because NASA images are not copyrighted, and are public domain.

Hi bhankiii........looks ok

Done on an antique HP 932 printer (I've been refilling the same cartridge for years)

If lines are equidistant maybe your printer needs to have the belt/gears cleaned?

No - it's not a mechanical problem. First of all its a brand new printer (and we went through all the cleaning and alignment steps anyway). But also, the files that have the lines always print the lines and the files that don't have the lines never print the lines, even though the images are the same size. I can print them over and over in any order and only bad files will always have the problem and the others never do.

Then I suspect it's been psp resized as opposed to resampled.

just throwing this out, (I haven't read all the responses, yet) Since its a new printer, is there a possibility of noise in the communication lines/cabling to the printer? or bad connection.

^{I hope we can find the problem.....ya know we shoot horses that go lame}

I was wondering that myself. I'll have to try it and see.

I went to the URL, saved the picture to my PC, opened it in Photoshop, then printed it with my Canon i9900 printer... No lines, no artifacts.

I think it might be Picture Manager.

It is your printer. I printed the image provided on our plotter and got no lines at all. It printed 16x20 inch. I did print it in black and white. If you tried to print it larger than 16x20, the lines may be a remnant of the enlarging process.

The shadow directions don't match thru out the photo so it is definitely an artists rendering.

I would contact your printer rep to see if they can tell you how to fix this, Or I would just not use the prints that don't work.

It's definitely an artists rendering, seeing as how the spacecraft doesn't exist yet.

The original file size is 3000 x 2400, but resizing in PSP changes the resolution. I suspect you've turned it into a hi-rez image that the plotter is having trouble handling, especially since the T610 has a max resolution of 2400x1200.

Try resampling the original image in PSP instead of resizing. That will enlarge the image without changing the resolution.

Here's a tutorial with more info.

The most likely problem is the paper that you are using is not designed for hi resolution "photographic" reprodution. The uniformity of photographic paper is closely monitored to ensure that ink from the printer has time to equalize and blend to ensure that no streaks, lines or bloths are produced.

The paper we're using is specifically for high resolution photo printing.

Take a look at the link:

http://articles.techrepublic.com.com/5100-10878_11-1043849.html

Thanks, I've tried all the obvious things. It's not an ink or print head issue.