Conversion TIF > JPG

[JHAG]

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Good evening everyone

I have a conversion problem for a submission.

My client asks me a JPEG file comprised between 900 Kb and 1,5Mb.

I have two master copies, one TIF, one PNG.

When I click "Save as" in CS2, I have no JPG option for "Format" :

only PNG, TIF, Photoshop RAW, Large document format, Photoshop PDF.

None of it fits the bill.

If I click "Save for Web", it's in JPG alright, but the pic (for around 1200 x 1000)

gets to 600 Kb at most.

Help !

[stunsworth]

Convert the image to 8 bits per channel, you should see the Jpeg option appear in the 'save as' dialog box <grin>

[JHAG]

Thank you dear Stuns…

No matter how I try : I have it in JPG alright, selecting image size > 1000 x 1004,

Resolution 950, it displays "Pixel dimensions : 980,5, which should be fitting.

Only that after saving it, file is reduced to 584 Kb only…

[stunsworth]

Jpeg is a compresed format, and the amount of compression depends on content of the image. What you are seeing is perfectly normal if it is an image that compresses easily.

[JHAG]

In fact, I know compression is normal, but why does the box Image size displays 980 Kb, when the resulting file is only 565 Kb ? My JPEG has to be comprised between 900 and 1500 Kb, with a pixel dimension of 1000… Usually, I never use JPG, but they want JPG…

[jaapv]

What is the original TIFF size? Did you not use a compressed TIFF? Or, as Stuart says, size varies with the contents of the file, whether they are "easily compressable"or not. 584 Kb is perfectly possible for some 1000x1000 images, even at the highest quality. Btw, I would not use "save for the web" It not only writes a Jpeg, but it also changes the colours, contrast and sharpening.

[JHAG]

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Hi, jaapv

 

Original TIFF (I have two) are 10,2 and 44 Mb respectively.

I finally obtained a 890 Kb file by magnifying image size to 1400,

but this is fiddling, really.

[jaapv]

Well, as long as it worked...

[JHAG]

[Delfi_r]

Try PMView Pro - Image Viewer and Converter, it's the better image viewer around, it's free for trial.

 

Then open your TIFF file and without resizing, click on save as... JPEG, under options put: quality 100% smoothing 0%, and if it's too large, increase smoothing up to 10% or reduce quality (it's a JPEG file) to 90%.

[Shootist]

Try PMView Pro - Image Viewer and Converter, it's the better image viewer around, it's free for trial.

 

Then open your TIFF file and without resizing, click on save as... JPEG, under options put: quality 100% smoothing 0%, and if it's too large, increase smoothing up to 10% or reduce quality (it's a JPEG file) to 90%.

My god that software may be good but it look like it is also very old. They offer a version for IBM OS2 Warp!!!! I haven't used that OS in 10+ years.

[JHAG]

Try PMView Pro - Image Viewer and Converter, it's the better image viewer around, it's free for trial.

 

Then open your TIFF file and without resizing, click on save as... JPEG, under options put: quality 100% smoothing 0%, and if it's too large, increase smoothing up to 10% or reduce quality (it's a JPEG file) to 90%.

 

Dear Delfi, thanks a lot, but… I work on a Mac. No PMView for me…

[philipotto]

I use the Save for Web. Just select the desired output size and voilà.

 

As an aside,

Unfortunately when you include save for web in an action, it saves the quality that is required to produce the desired file size, not the desired file size itself. So when you go to batch images, you end up with a wide range of file sizes. I would like to be able to batch images with varying compression, to output them all as the same file size.

[mgcd]

After taking a quick glance at this thread, another consideration is to NEVER set the quality lower than 8 when saving in JPEG, otherwise you will discover unwanted artifacts in your files due to compression. Thus set quality somewhere between 8-12 for best quality.

 

Cheers,

[Delfi_r]

My god that software may be good but it look like it is also very old. They offer a version for IBM OS2 Warp!!!! I haven't used that OS in 10+ years.

 

No, the last version for eCS and Os/2 it's only a few weeks old, and the next version will open Raw files on the fly. OS/2 is dead, but this dead OS is fair and alive, we are near a new release of it's successor, eCS

 

I am not a Mac user, but perhaps some emulation could run the win version.

 

There are ports of another program suite that we use, GBM but I haven't found the Mac distribution, but should not be far away. On the command line or with any programming interface you can do anything to image formats.

[DaveB]

IrfanView is a free utility that's very flexible and will allow for conversions, renamining, batch processing and all sorts of other stuff.<P> When PS doesn't get the job done I usually find IrfanView does.