High resolution JPEG Images

Classic Servoy
1

I am storing a bunch of high resolution JPEG images. I understand that displaying the fullsize images will be slow and could cause memory issues. I plan to deal with this using thumbnails. The trouble I am having is that Servoy displays the high resolution images very very slowly. I have loaded 80,000 (average resolution 1600 x 1200 average size 600K)It seems to handle JPEG images up to 800 x 600 with no problem but when I get to the resolution of most of the prosumer digital camera it seems to slow exponentially. I estimate it will take a fast machine months to generate thumbnails for these images. Can anything be done to make the display of high resolution images more rapid? If I print a high resolution image will it print at screen resolution or will it use the full resolution of the image? I have attached an image that loads slow and one that loads fast.

Thanks

John McCann

2

I read my prior message and the true problem might not be obvious from it. In order to make a thumbnail of a high resoluiton image you must display the image on a button or a label. Servoy displays the high resolution images so slowly that it is very time consuming to create the thumbnails. Is thier any way to get Servoy to display high resolution images more quickly?

John McCann

I guess the good news is that I was able to load 40 gigbites worth of JPEG images and 40 gigabites worth of PDF documents into my database without a perceptable change in performance! If I could just get the thumbnails to generate I would be golden.

3

Just a thought but might it not be possible and perhaps better to first convert the images to thumbnails/lower resolution in a different application? Importing images into Servoy/ASA goes seems to go very quickly. I imagine there must be applications that are dedicated to that function and would be able to ‘bulk’ convert very quickly. Did you also see the thread below? Maybe there is a bug in the 2.0 release concerning this:
http://forum.servoy.com/viewtopic.php?t=1997

4

John,

I could bulk convert the old images but we aquire about 400 new images per week. The time and training involved in doing this makes it not practical for the newly aquired images. Furthermore, it is something that should be possible within the Servoy envirmonment. The problem is not the function that creates the thumbnails. This seems to work fine. The problem is that high resolution images display very very slowly in Servoy.

John McCann

5

in 2.1 you don’t have to view a file first before showing it i will test if this helps up the speed.

6

I look forward to testing it out.

Thanks

John McCann