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very slow record navigation

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    very slow record navigation

    hi to all,

    i have an employee logging system that stores employees database with employee picture, and stores time-in logs. we experience that reference on the image file has been lost.

    the employee file contains 818 records and its very slow in record navigation.

    i use image file reference for the jpg images that are stored in a folder on the same drive.

    is there better approach to speedup navigation?

    will attach a sample picture here.

    tia
    Francis

    #2
    Re: very slow record navigation

    I noticed that your sample picture is approximately 1.5MB. When I threw together a sample table with references to pictures that size, I experienced slow record navigation as well. I have another table that has about 7000 records that references one 100kb image per record with no noticeable delay.

    So, I'd recommend reducing the file size used for the pictures in your database. If you still need the full resolution images as well, you could store the path in a character field and open them with a button on the form.

    ~Jason
    Last edited by Juniper; 02-02-2011, 10:15 AM.

    Comment


      #3
      Re: very slow record navigation

      You might consider using thumbnails for most display situations and only open the full size pictures on demand.
      There can be only one.

      Comment


        #4
        Re: very slow record navigation

        Jason and Stan,

        thanks for the inputs.

        stan, how can i convert the existing pictures to thumbnails and how to preview the full sized image when i hover on the thumbnail?
        (something like cooliris add-on on mozilla firefox browser.

        jason,

        how can i reduce the file size to 100kb without loosing much of the quality of the image?
        Francis

        Comment


          #5
          Re: very slow record navigation

          You can't reduce the file size without losing quality. My suggestion was essentially the same as Stan's. Apparently you need the full resolution for something, so only display it when you need it. Use a lower resolution copy (thumbnail) for the form's normal display. If Alpha has a means of automatically generating thumbnails, I'll have to leave it to Stan to explain how. :)

          ~Jason

          Comment


            #6
            Re: very slow record navigation

            how can i convert the existing pictures to thumbnails

            I just found a neat website, Google. Led me to 124,000 hits when I searched for

            freeware thumbnail creator

            Go figure.
            There can be only one.

            Comment


              #7
              Re: very slow record navigation

              how to preview the full sized image when i hover on the thumbnail
              Images don't have events so you have to place a user object over the image, make sure the object is in front, transparent, and code the onmouse event.
              There can be only one.

              Comment


                #8
                Re: very slow record navigation

                big thanks to you both
                Francis

                Comment


                  #9
                  Re: very slow record navigation

                  Before discarding the option of resizing your photos you might want to take a look at the loss in photo quality resizing would have. It is quite likely you will not notice very much difference in the quality of the resized photos unless you are going to be using very large images.

                  A freeware photo resizer that has a lot of options and is very easy to use can be found at http://www.faststone.org/ . This software will work with Windows XP, Vista and 7.

                  If you are using Windows XP, Microsoft�s Power Toy�s Image Resizer while not having many options is super simple to use. It can be found at http://www.microsoft.com/windowsxp/d...powertoys.mspx .

                  A resized to 100K copy of your photo using Faststone's software is provided below.

                  Comment


                    #10
                    Re: very slow record navigation

                    Rich,

                    thank you so much for the tip and links.

                    awesome tool
                    Francis

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