CFImage Functions and DPI / Image Quality.

I am doing some work that involves taking images supplied from a product called Fotoweb and putting them into PDF files using cfdocument.
We are noticing a degradation in image quality that seems to be coldfusion related.
In the code below I am reading in an image @ 300DPI from the Fotoweb product. It is definately 300dpi. I am then writing the image back to a file without any manipulation and it becomes 96DPI.

<cfset theImage=ImageRead(aUrlToGetImageFrom)>

<cfset ImageWrite(theImage,aFileToWriteTo,"1.0")>
In production we want to be able to resize the image to 5"x7" at 300DPI in a pdf. However as soon as coldfusion gets involved we get bumped down to 96dpi.The image quality is very important as these pdfs will ultimately be printed.
Is there anyway of telling CF to keep the image at 300dpi.
Thanks in advance
Nick

You comparison method is seriously flawed. For 1 image to be at 72 DPI (a software supplied setting) & the other to be at 180 DPI it means that one image has been enlarged (180 divided by 72) 2.5 times more than the other to view it on screen. Zoom in on the good image until it's 2.5 times larger & see how it looks.
Next thing you need to know is that camera technique becomes more important as pixel count increases. an 18 Mpixel image will have an 80% increase in softness over the 10 Mpixel camera from identical camera shake. To make any accurate form of comparison you will need to eleminate the possibility of introducing camera shake into the test. You will also need very similar lighting & the subject must also be stationary for all test shots. (IE that eye (or the person it's attached to) may have moved during one shot but not the othern
"A skill is developed through constant practice with a passion to improve, not bought."

Similar Messages

Compressing pdf's and keep image quality for email send outs

Hello
I have a 55MB Pdf file which I would like to compress to be compatible with email send outs. I work a lot with imagery and need my visuals to be crisp and sharp. Anyone clued up on what settings to use to keep the best possible image quality? Would appreciate some support on this. I work with Mountain Lion and Apple's own compression filter in Preview is really poor. I have tried to download compression filters but nothing seams to work with the system I am running….
Thanks, Anna

Hi Anna
If you are trying to compress a document that contains images, you would have to compromise on the quality of the images. You may visit How to compress a PDF file | Acrobat X Tips & Tricks | Adobe TV
Adobe also has a direct solution to send large size files in the quick way without losing the quality. Please visit How to send large PDF files via email | Acrobat X Tips & Tricks | Adobe TV

IDVD and poor image quality on TV

I imported old VHS/VHS-C tapes into iMovie via Elgato Video Capture, using standard 4:3. I then edited my project iMovie and "shared" it to iDVD. However, on TV, image quality is horrid. What am I doing wrong?

As Old Toad writes BUT
• Share to Media Browser - AND as Large - not HD or the other resolutions as quality will degrade.
• burn on high quality media - I only use Verbatim DVD-R (as they play on more DVD-players)
• Set down burn speed to x4 = Less burn errors
• Encoding quality matters - I use Pro Quality most
else read my long long list on this.
DVD quality
1. iDVD 08, 09 & 11 has three levels of qualities. (version 7.0.1, 7,0.4 & 7.1.1) and iDVD 6 has the two last ones
• Professional Quality
(movies + menus up to 120 min.) - BEST (but not always for short movies e.g. up to 45 minutes in total)
• Best Performances
(movies + menus less than 60 min.) - High quality on final DVD (Can be best for short movies)
• High Quality (in iDVD08 or 09) / Best Quality (in iDVD6)
(movies + menus up to 120 min.) - slightly lower quality than above
Menu can take 15 minutes or even more - I use a very simple one with no audsio or animation like ”Brushed Metal” in old Themes.
About double on DL DVDs.
2. Video from
• FCE/P - Export out as full quality QuickTime.mov (not self-containing, no conversion)
• iMovie x-6 - Don't use ”Share/Export to iDVD” = destructive even to movie project and especially so
when the movie includes photos and the Ken Burns effect NOT is used. Instead just drop or import the iMovie movie project icon (with a Star on it) into iDVD theme window.
• iMovie’08 or 09 or 11 are not meant to go to iDVD. Go via Media Browser or rather use iMovie HD 6 from start.
3. I use Roxio Toast™ to make an as slow burn as possibly e.g. x4 or x1 (in iDVD’08 or 09 this can also be set)
This can also be done with Apple’s Disk Utilities application when burning from a DiskImage.
4. There has to be about or more than 25Gb free space on internal (start-up) hard disk. iDVD can't
use an external one as scratch disk (if it is not start-up disc). For SD-Video - if HD-material is used I guess that 4 to 5 times more would do.
5. I use Verbatim ( also recommended by many - Taiyo Yuden DVDs - I can’t get hold of it to test )
6. I use DVD-R (no +R or +/-RW) - DVD-R play’s on more and older DVD-Players
7. Keep NTSC to NTSC - or - PAL to PAL when going from iMovie to iDVD
(I use JES_Deinterlacer to keep frame per sec. same from editing to the Video-DVD result.)
8. Don’t burn more than three DVDs at a time - but let the laser cool off for a while before next batch.
iDVD quality also depends on.
• DVD is a standard in it self. It is Standard Definition Quality = Same as on old CRT-TV sets and can not
deliver anything better that this.
HD-DVD was a short-lived standard and it was only a few Toshiba DVD-players that could playback.
These DVDs could be made in DVD-Studio Pro. But they don’t playback on any other standard DVD-Player.
Blu-Ray / BD can be coded onto DVDs but limited in time to - about 20-30 minutes and then need
_ Roxio Toast™ 10 Pro incl. BD-component
_ BD disks and burner if full length movies are to be stored
_ BD-Player or PlayStation3 - to be able to playback
The BD-encoded DVDs can be play-backed IF Mac also have Roxio DVD-player tool. Not on any standard Mac or DVD-player
Full BD-disks needs a BD-player (in Mac) as they need blue-laser to be read. No red-laser can do this.
• HOW much free space is there on Your internal (start-up) hard disk. Go for approx. 25Gb.
less than 5Gb and Your result will most probably not play.
• How it was recorded - Tripod vs Handheld Camera. A stable picture will give a much higher quality
• Audio is most often more critical than picture. Bad audio and with dropouts usually results in a non-viewed movie.
• Use of Video-editor. iMovie’08 or 09 or 11 are not the tools for DVD-production. They discard every second line resulting in a close to VHS-tape quality.
iMovie 1 to HD6 and FinalCut any version delivers same quality as Camera record in = 100% to iDVD
• What kind of movie project You drop into it. MPEG4 seems to be a bad choice.
other strange formats are .avi, .wmv, .flash etc. Convert to streamingDV first
Also audio formats matters. I use only .aiff or from miniDV tape Camera 16-bit
strange formats often problematic are .avi, .wmv, audio from iTunes, .mp3 etc
Convert to .aiff first and use this in movie project
• What kind of standard - NTSC movie and NTSC DVD or PAL to PAL - no mix.
(If You need to change to do a NTSC DVD from PAL material let JES_Deinterlacer_3.2.2 do the conversion)
(Dropping a PAL movie into a NTSC iDVD project
(US) NTSC DVDs most often are playable in EU
(EU) PAL DVDs most often needs to be converted to play in US
UNLESS. They are play-backed by a Mac - then You need not to care
• What kind of DVDs You are using. I use Verbatim DVD-R (this brand AND no +R or +/-RW)
• How You encode and burn it. Two settings prior iDVD’08 or 09
Pro Quality (only in iDVD 08 & 09)
Best / High Quality (not always - most often not)
Best / High Performances (most often my choice before Pro Quality)
1. go to iDVD pref. menu and select tab far right and set burn speed to x1 (less errors = plays better) - only in iDVD 08 & 09
(x4 by some and may be even better)
2. Project info. Select Professional Encoding - only in iDVD 08 & 09.
Region codes.
iDVD - only burn Region = 0 - meaning - DVDs are playable everywhere
DVD Studio pro can set Region codes.
1 = US
2 = EU
unclemano wrote
What it turned out to be was the "quality" settings in iDVD. The total clip time was NOT over 2 hours or 4.7GB, yet iDVD created massive visual artifacts on the "professional quality" setting.
I switched the settings to "high quality" which solved the problem. According iDVD help, "high quality" determines the best bit rate for the clips you have.
I have NEVER seen iDVD do this before, especially when I was under the 2 hour and 4.7GB limits.
For anyone else, there seem to be 2 places in iDVD to set quality settings, the first is under "preferences" and the second under "project info." They do NOT seem to be linked (i.e. if you change one, the other is NOT changed). take care, Mario
TO GET IT TO WORK SLIGHTLY FASTER
• Minimum of 25Gb free space on Start-Up hard disk
• No other programs running in BackGround e.g. Energy-Saver
• Don’t let HD spin down or be turned off (in Energy-Save)
• Move hard disks that are not to be used to Trash - To be disconnected/turned off
• Goto Spotlight and set the rest of them under Integrity (not to be scanned)
• Set screen-saver to a folder without any photo - then make an active corner (up right for me) and set
pointer to this - turns on screen saver - to show that it has nothing to show
Yours Bengt W

Help! My 300 dpi images are printing low quality!

I've purchased print-ready images (300 dpi) from an extremely well-known stockphoto website to use in a brochure I'm creating. On the brochure cover (which is 8.5" x 5.5"), I have placed 14 of these print-ready images. (FYI-all of these print-ready images are pictures of people smiling while doing various activities.)
As you can imagine, I have had to reduce the scale of each of these print-ready images to approximately 1" x 0.7" to fit on the page. The layout itself looks really nice, but when I attempt to create a .pdf using the "Print Booklet" option, all of my images look horrible! I've also attempted to create a .pdf using the "Export" function and selecting "Press Quality" and my images are slightly better, but still look horrible!
I have also re-scaled the images in Photoshop (leaving them at 300 dpi) and created a .tiff file, but no matter what I do (and I've been wrestling with this single problem for DAYS), I can't get these images to actually appear clearly on a printed page. When I forwarded my brochure (in .indd, .pdf, and .eps formats) to a professional printing company, they came back to me telling me to use print-ready images.
I've been working with print-ready images for well over a year and have sent multiple jobs to professional printers and this is the first time I've ever had a problem with images looking like they aren't print-ready. Could it be that you can only reduce the size of an image so much? Has anybody had this problem before???
Thanks in advance for your input!

Thanks for the comments thus far! I forgot to mention that all of my images are .jpegs (300dpi).
I've reviewed my "Print Booklet" settings and under my "Images- Send Data," I have "All" selected as opposed to "Optimized Subsampling." My Effective Resolution is also set at 300 dpi.
I'm still working, and am open to more suggestions.
Thanks!

Image quality and report size

Hello,
I have a problem in the export to PDF document. I use CR 10.2 with Visual Studio 2005 in a web application.
My problem is that I have a report of photographies, in wich I need an aceptable image quality. I don´t show the report in an report viewer, I create the report document and export it to PDF sending the memorystram in the http reponse.
Firstly I see that the PDF document image quality was so bad. Then I checked the report property "Retain original color depth", and the image quality was good, but the PDF size was too big, two photographies of about 2MB(each one) generates a PDF file of about 20MB size.
I need to send the pdf files to the clients via email, but the files are so big, and if the cllient inserts 10 photographies, the report size would be of about 100MB. Is there any wallkaround to this issue?. Is there this issue fixed in crystal reports XI?
Best regards

See [this|Crystal to PDF; thread. As unsatisfactory as the answer may be, it is what it is...
I believe R&D is looking at this issue, but as an enhancement for a future release of CR.
Ludek

!! Exporting SWF file in PDF reduces image quality.

Hello,
I have a file with many multi-state picture frames and buttons for them. I export it in pieces in SWF format, then I put the SWF's back in the document as a new layer and export as interactive PDF. Finally everything worked fine, except that PDF opens in a larger then normal zoom and when zooming in on pictures the quality is very poor I am guessing 72ppi at the intended zoom. I check the SWF file and see that its image quality is good when zoomed, so the problem is with the way the PDF has exported the SWF.
notes: I made sure the settings were to export at 300ppi and high image quality. When I take a single multi-state frame with its associated button and export to SWF then PDF the image quality is maintained.... however I have over 150 image frames, so I rather not export them individually. Please, please reply... any suggestions will be gratefully excepted.

edit your image in photoshop and experiment with various settings/size. there's no magic high quality small file size setting.
it's a trade-off. the higher the quality and the greater the image dimensions, the greater the file size. you have to decide where those are acceptable.

10.6.2: Bad image quality with SIPS

I used to convert my PDF documents with SIPS like this:
/usr/bin/sips --setProperty format jpeg --setProperty formatOptions high -z 400 200 sourcefilename.pdf --out targetfilename.jpg
This results in a very bad image quality after updating to 10.6.2 (the text contained in the source pdf file is nearly unreadable in the resulting image, especially when using the -z attribute for downsizing).
I could reconstruct this behaviour with several machines today: when using 10.6.1 the quality is fine, but after the update to 10.6.2 the resulting image quality is unacceptable.
Any ideas? Or could this be a bug? The man page for sips does not contain any information about new parameters and the image quality for other target formats (tif, png, ...) seems to be ok.

That picture looks like it was taken in a dimly lit room.
You could try using night mode but you will need a very steady hand.
Most basic phone cameras just cannot produce good pictures indoors when not in brightly lit areas. LED flashes just cannot do a good enough job when compared to real cameras.
Megapixels don't equal quality, it's the lens and flash that make the biggest difference.

Radeon 6850 poor image quality via hdmi

Hi have a connected via HDMI cable to a Sony Bravia 32in 100hz LCD TV and the image quality is poor Windows appears really pixalated, have used this TV with on board graphics and image quality is great any ideas?

Still you should be able to bump the Res up with DVI to DVI if it has that port. VGA PC to DVI TV will work 1080P. Some manufacturer though do not allow DVI to do 1080p I read somewhere. My LG 50" TV has every port I could think of DVI VGA RCA COAX HDMI probably more that I dont even know. It does 1080p with DVI but HDMI is easier with the sound.

Poor webcam image quality (HP Touchsmart Notebook

I recieved a HP touchsmart Notebook as a Christmas gift and the image quality is horrible! Even in a well lit environment, the image is still not clear. I have adjusted the settings to try to improve the image quality, but there is still not much of a difference in the way the images appear. I have also tried to reinstall the Cyberlink YouCam application but the image quality is still the same (poor). I like some features on my laptop, yet I'm still getting aquainted with it. However, the image quality along with a few other technical issues such as (freezes), has negatively impacted how I view this product. I hope that there is something that could be done! Please help!

Hi @mzdymond01
Thank You for the inquiry, I will do my best to assist you!
I understand you received this notebook at Christmas and image quality of the WebCam is poor.
Have you done all your Windows updates?
Have you tried Using automated troubleshooting (Windows 8)?
Have you ran the HP Support Assistant to assist with HP updates?
Here is a link to Webcam Troubleshooting (Windows 8) that will guide you through some steps.
If the issue should remain I suggest contacting HP support for further assistance. As this is a new product you want to ensure everything is performing as it should.
Please call our technical support at 800 474 6836. If you live outside the US/Canada Region, please click the link below to get a support number for your region.
World Wide Phone Support
Best of Luck!
Sparkles1
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping!

Cleaning up Image quality of old VHS tapes

Is there anything you can do in final cut pro to clean up the image quality of captured footage.. even slightly? I am capturing a bunch of old VHS and Hi8 tapes from the early 90's and the image quality is quite bad. Is there anything I can do to fix this at all?

There is also a little trick I use when I see particularly bad anlog dropouts on this type of footage.
Usually these dropouts appear as a horizontal stripe of yuckiness on only one field of a frame. I will often razor blade around just the one frame showing the dropout, and apply a de-interlace filter to that frame. I'll then change the settings of the filter until I find the field that does not have the dropout.

JPEG Image Quality problem

Until yesterday, when saving an image as a JPEG I would click "Save As", select my folder and the Image Quality dialog box would pop up and I would then select 12/Maximum as the image quailty and hit "OK". Thereafter, every time I saved an image, Photoshop applied the same settings as the previous save i.e., 12/Maximum was pre-selected and I would just hit OK and move to my next image.
However, since yesterday Photoshop is no longer pre applying the last setting used and is defaulting to quality 8/High every time. Si everytime I save, I am now having to slide the slider to 12 which is kind of interrupting my work flow.
I have tried delete my preferences settings in the hope that this glitch would be fixed by resetting the program, but the problem persists.
Has anyone experienced this and how can I fix it?
Thanks.

AFAIK jpeg quality settings are sticky per file, not globally (at least inside Photoshop, but that association may not transfer between applications).
So if the files are out of a camera they probably already have a quality level assigned, and Photoshop is honoring that. Try a low setting on a test file and see what happens when you resave that. It should be the same.
And...oh, never mind. You probably know already...cumulative quality loss and so on...

Bad image quality of slideshows

I am a new Mac user. I am having difficulty making slideshows from the iLife version 6 software with the features that I want and decent image quality.
I've been trying with iPhoto, iMovieHD and iDVD. I want to be able to put captions or title screens in my slideshows, so I must use either iDVD or iMovieHD. If I do not want my photos to pan and zoom, I can use iDVD. I've done this and burned the result to a DVD. When I play the DVD on my 65" wide screen high definition television, the image quality of the slideshow is not satisfactory. Diagonal lines have visible stepping. Just before a photo transitions to the next photo, there is a noticeable increase in the number of digital artifacts for about one second.
For some slideshows, I wanted to have the pan and zoom effects, and title screens, so I used iMovieHD. When I started the project, I chose the format 1080i because that is what my high definition television can do. I realize, however, that my DVD player cannot do that resolution, so I am not sure that was the correct format to choose. I "shared" the completed slideshow movie to iDVD. When I play that slideshow, I see many digital artifacts in the images as the zoom happens. The images are not as good as looking at the original digital photos on the computer.
Is there a way to make a slideshow on a DVD that has an image quality that matches the original digital photograph? Is it possible to use the pan and zoom effect when I wish to play a DVD slideshow on a television?
Any help is appreciated.
MacBook Pro Mac OS X (10.4.4) 2MB memory, 15"

I realize that I did not ask exactly the right question.
I've made slideshows using U-lead software on my windows XP desktop machine. The image quality of those slideshows on a standard TV is better than what I can do with iDVD and iMovie. So I'm wondering is there something I need to do in iDVD that might be automatically happening in the U-lead software. Obviously, I do not expect people here to know anything about that software, but you might know of something in the iDVD software that will prevent the digital artifacts that I see when I use iDVD to make a slideshow. So far, the slideshows I've made are bordering on not watchable.
MacBook Pro Mac OS X (10.4.4) 2MB memory, 15"

Image quality issue while exporting video to FLV

Hi, I have a major problem: I am using Adobe Media Encoder to export a movie (FLV format) and the image quality is so bad I can't read the text in my logo. The movie was created with Adobe Premiere Pro CS4. No matter what settings I chose from Media Encoder dropdown menu, I get the same bad quality.
Can anyone help me?
Thanks!
Laurent

Hi and thanks for the answer. The datarate is 1 500 Kbps, I increased it to 2 500 and I haven't noticed any differences. The source media is MPG from a camcorder. The export settings are 720 X 480 px. What are the sequence settings? I am not familiar with that.
Thank you,
Laurent

Can I improve the image quality in Safari?

As a photographer one of the things I was most looking forward to doing on my iPad was browsing flickr and other photo sites.
Unfortunately safari seems to re-compress the images it displays (to save memory?) and the resulting JPEG artifacts are so distracting that it's not even worth looking at my contacts photos until I'm back on my laptop.
To reproduce this just go to flickr on your normal computer and on the iPad and compare some images - it's a pretty big difference.
I can't see any settings for image quality anywhere. Is there anything I can do, or am I stuck waiting for an iPad version of the Flickr app?

jbt99 wrote:
Alley_cat, you're right... I just installed an AirPort last night and over WiFi everything looks fantastic! For the record I'm getting 3G from O2 in the UK, so I guess that means they're compressing the images?
Looks like it.
I've noticed it too on my O2 connection and the image quality is abysmal.
A quick search hasn't yielded a solution - changing the O2 username to bypass in some setups apparently bypasses the proxy, but someone on O2 forums was asking before iPad was released, and the inference was that unless you had a long term contract, all the pay as you go type options didn't allow this to work.
I also tried a different server setting for O2 and it told me I had no allowance left - fortunately this went when I reset the setting.
I may try contacting O2 and would urge others to do so as it really I pairs the user experience.
Vodafone does the same with a USB dongle I have but in theory I can get them to disable the proxy.
Btw, I've just had the chance to have a proper play with my iPad this morning, downloading apps and stuff, and I have to say it's exceeding my expectations in every way (and my expectations were high!). What an amazing machine

Photoshop slice tool and Save for Web image quality. Will it affect prints?

I want to slice a large photo into multiple smaller (4x6) printable photos to arrange in a 12x12 inch scrapbook binder pocket (made of of 4x6 pockets). I need to order separate 4x6s online so tiling in the print options is not what I need.
The slow way I know to do this involves cropping and saving each section (maybe even recording this action to do batch processing). However, another way is to use the slice tool to quickly divide up the sections then "Save for Web...". I can adjust some parameters, but I'm afraid there are other automatic adjustments that I don't want. For example, all images are converted to 96 dpi instead of the original 300 dpi. The number of pixels remains the same so I don't think there will be problems printing the picture.
My question is: does the Save for Web function reduce image quality in any way when printing (it is obviously intended to be used to optimize images for websites)? Are there settings in "Save for Web" that would optimize for high quality prints? Is there a better way to tile an image?
I have not yet compared any prints.
W7
CS6

If you understand that something will do something you do not want like convert to 96 DPI as long as it does not resample you can always convert back to 300 DPI. If you want 6 4x6 to form a 12x12 you must start with an square 1:1 aspect ratio image. That you resample to 12"x 12" at 300 dpi if you want 6 4x6 300 dpi images.
If the original images vary in size and aspect ratio you need to crop them square or add two borders to make them square. The rest is easy to do with an action.
The square crop or border can be automated with a little scripting. If crop a center crop would be the route to go. My crafting actions package contains more the a dozen scripts to be used within action. One is a plug-in script that would make center cropping a snap two steps menu File>Automat>AspectsRatioSelection followed menu Image>Crop. Add a menu Image>Size set side to 12" and resolution 300 DPI and you have your starting 12"x12" 300 dpi image.
Flatten the image make your first 4"x6" selection copy past to add it as a layer. Select the background select the next 4x6 area copy and paste repeat that process till you have added the 6 4"X6" layers. Then delete the background, Select all, target all layers and use layer>Align layers to selection>Top edge then repeat align to left edge. the Image>Trim you have your 6 4x6 in a stack. You can the use Adobe Photoshop Script Export Layer to file. All automated in an action however the last step Export layers to files is interactive for its not a plug-in script. So if you batch it you keen to hang around to interact with the last step for each image.
You could also write you own export script that would not need human intervention to use instead of Adobe interactive script.
Crafting Actions Package UPDATED Aug 10, 2014 Added Conditional Action steps to Action Palette Tips.
Contains
Action Actions Palette Tips.txt
Action Creation Guidelines.txt
Action Dealing with Image Size.txt
Action Enhanced via Scripted Photoshop Functions.txt
CraftedActions.atn Sample Action set includes an example Watermarking action
Sample Actions.txt Photoshop CraftedActions set saved as a text file.
More then a dozen Scripts for use in actions
Example
Download

CFImage Functions and DPI / Image Quality.

Similar Messages

Maybe you are looking for