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Exact wallpaper and caller ID picture sizes for Sanyo 6400

by martianviking    Mar 30, 2004, 2:06 PM

I have spent a good bit of time experimenting with sample images (with per-pixel rulers on them) to find out exactly what the optimum image sizes are for the Sanyo 6400, so I figured I should share with anyone else that might be wanting to put some custom pictures onto their trusty "Mr. Skinny for Vision."



BASIC IMAGE CONSTRUCTION
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For the Sanyo 6400, always use 120 (width) x 96 (height) greyscale images for both wallpapers and picture caller ID. As a general rule, the entire image (all 120x96 pixels) should be actual picture (no extra white space at the top, bottom, or edges). This will allow every image to look good regardless of whether you use it as wallpaper or picture caller ID.

I have found that saving pictures as greyscale PNG files (in "Grayscale" mode using Photoshop) produces the best results. The phone will still dither it a bit, but the image is smaller than it would be if you left it in RGB mode and it seems to look better than if you try to dither it yourself (surprisingly).

Another thing to mention is that if you turn down the brightness a bit and turn up the contrast a bit before saving and after switching to greyscale, the images will look better on the phone.



TIPS ON CROPPING/RESIZING
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Try to keep the main part of the picture (a person's face or the main part of the design) in the center of the picture. For wallpapers, definitely keep the good parts of the picture out of the bottom 15 pixels. For pictures that you will be using for caller ID pics, try to keep the important parts of the picture out of the bottom 22 pixels and also out of the top 15 pixels (if you can).

The reason is that when used as a wallpaper (screen saver), the bottom 15 pixels of the image will not show up at all, and when used as picture caller ID the top 15 pixels AND the bottom 22 pixels will be partially obscured by the callers name at the top and phone number at the bottom (this leaves only a 59 pixel tall portion of the picture in the middle that is completely clear when displayed as picture caller ID). Read the "specific details" sections below for more discussion on this and an example picture.



SPECIFIC DETAILS ON WALLPAPERS
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As I said above, when used as a wallpaper, the bottom 15 pixels of your image will not show up at all.

So, if you knew you would only be using a certain picture for wallpaper (screen saver) and never for caller ID, then it would be okay to ignore the note at the very top in the "basic image construction" section that tells you to fill the entire image with the picture. What I mean is that in this particular case it would be fine to use a 120x81 greyscale picture to start with and just add 15 pixels of blank space to the bottom to create your 120x96 image (if you don't add the extra space to the bottom then the image will not center correctly on your screen; you should always upuload only full 120x96 pixel image file). Remember, DON'T DO THIS if you think you might want to use this image for picture caller ID, because then there would be some blank space at the bottom (showing up behind the person's phone number) that could have been filled by part of your picture.



SPECIFIC DETAILS ON CALLER ID PICS
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When used for picture caller ID, the entire 120x96 pixel image will show up but parts of it will be partially covered by various information, as follows:

Only the 59 pixels in the center (below the top 15 pixels) will always be completely visible and unobstructed.

In the the top 15 pixels it will display the first 13 characters of the caller's name as it appears in your phonebook (FYI, your phonebook will allow you to input up to 16 characters). You will be able to see some of the picture through the letters.

A 16x9 pixel box directly to the right of the caller's name will be completely covered by a black box with a white letter in it indicating what type of number is calling (M for mobile, H for home, W for work, etc.).

In the 20 pixels near the bottom (above a 2 pixel space, so effectively 22 pixels at the bottom) it will display the caller's number. You will be able to see some of the picture through the letters, and there will be 2 pixels at the very bottom that will be completely uncovered (but it's hard to see much of anything in a 2 pixel tall strip, so pretty much just consider the entire bottom 22 pixels of the image to be partially obstructed by the phone number of the caller).



That's it; I hope a few of you find this useful.

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