I dont know anyway of making a transparent jpeg - but i could be wrong.Originally Posted by Mr_P
Maybe jpeg 2000? but the performance of jpeg 2000 used to be terrible in quicktime
http://www.jpeg.org/
http://www.jpeg.org/jpeg2000/index.html
I dont know anyway of making a transparent jpeg - but i could be wrong.Originally Posted by Mr_P
Maybe jpeg 2000? but the performance of jpeg 2000 used to be terrible in quicktime
http://www.jpeg.org/
http://www.jpeg.org/jpeg2000/index.html
To take a pre-existing object or photograph which has a background you want to remove -use the extract filter in photoshop.
The extract filter takes quite a bit of experimentation.
You are going to have to read the manual on how to use this
But i took this image of some flowers and made the blue sky transparent.
You have to hand draw around the edges to help the filter, the 'smart hilighting' check box helps enormously. i used a big brush size to outline the edges. your brush size will depend on the resolution of the images.
the nicest thing about extract is that you dont have to be too accurate! just broad brush strokes, in close to the right place.
Richard -
thanks for the info - I've got it working now...
I created a blank document in photoshop with a transparent background.
Then used the magic mask tool to select the white areas in my graphic, then inverted the mask to select my object and copied it in to my new transparent document.
Saved it as a tiff, with the settings suggested - and it works brilliantly, with no need for transparent colour effects. - Object floats over background with no noticeable distortion
One of the issues I had was that I was using coreldraw (PC) to create the tiffs - and it doesn't save transparent backgrounds, although tiff format supports them... Basically it was merging the transparent with white... hence no transparency seen.
Got a bit of work to do converting all the relevant tiffs - will try your second method mentioned.
However, I can still use transparent white or tint colour effects for making simple text graphics on white backgrounds transparent
Thanks for the help
S
If you have a lot of images a mac program like graphic convertor will batch convert an entire folder - if setup correctly.
( there may be other programs that do this... )
http://versiontracker.com/dyn/moreinfo/macosx/11559
when you have a complex image to separate with complex edges and ambiguous boundaries, using the extract filter is much better than using the magic mask.Originally Posted by Mr_P
There are several nice apps if you spend some money to give you very good result when extracting or masking you pictures.Timesavers!Originally Posted by samsc
Extensis Mask Pro is cool:
http://www.extensis.com/en/products/...=en_US&id=1018
Peppe Tannemyr
Beacon DigiGobos®
www.digigobos.com / www.gobogroup.com
Quick message to say thanks for all the info - just finished the fashion show and all went well - got all the required images invisible using a mix of all the suggestions...
Got some good results with inverse tint too - but a little bit stuttery on some playback... where invisible white or black didn't as much...
how many layers?Originally Posted by Mr_P
what discs?
Which computer?
where you using your g4 with the delta audio card?
Using 1 x layer as animated background - cloud loop (feedback video - 006 SD_Cloud010.mov)
+ 1 x layer as tiff object with either embedded invisible background (see attached) or invtint on the white background (depending upon picture) - object then moved from L to R of screen with x,y posn
(ie a shoe flying through the clouds!)
Noticed a slow down of the background as the 'shoe' moved across the screen - normal playback resumed as soon as the shoe disappeared
Using a G5 2G mac with 2GRam - clean up-to-date hired machine - think it was a SATA drive, but might have been a fast SCSI one (wasn't my G4! - I only use it for pre-production)
Incidentally - are there any issues concerning xfade between a PAL and NTSC clips? Is it recommended to stick to one format - or doesn't it matter?