I am creating an application that processes Pictures of Resistors taken with Smartphone Camera and then provide us the resistor values directly. For this I need several groups of resistor pictures from different sources so that I can understand (or at least try to understand) the quality and clarity of different Smartphone cameras, their different resolutions, the lighting and different resistors normally used by people and so on. Use only Smartphone cameras to take pictures and don’t do any color corrections.
If you would like to help then go ahead. Take some Resistor pictures with your Smartphone Camera and upload them.
It will only take a minute or two.
Please follow the procedures below for taking photos:
1. Picture's Background: Pictures with white background only are needed. Just take an empty white paper and put some resistors on it.
2. Resistor type: Use common resistor types only (1/2 or 1/4 watt that everybody normally uses with breadboards). Use only 4 color band (3 for values + 1 for tolerance - gold) resistors with a beige or any similar white-like background color (This resistor background color is the recommended one; any other color is also OK if you don’t have that color). A sample picture of resistors with beige background is shown here http://imgur.com/jhiDkA9
3. Resistor arrangement: Well, particularly nothing! Just put resistors in some random positions may be with one overlapping the other but make sure that all color bands of all resistors are visible and not hindered by metal part of other resistors. Feel free to use more number of resistors.
4. Camera Lighting & Options: Don’t use zoom (Zoom out fully if you are zoomed in). Don’t take pictures with flash(set flash mode to off in options). Instead use some adequate lighting that doesn't make the picture too dark or too bright.
5. Positioning Camera and taking pictures: Try to move your phone as near as possible to the resistors. If you move too near you can notice that your camera's cannot auto-focus the picture. If that happens move your camera a little above. And now take 2 or 3 pictures with different resistors.
Uploading the pictures taken:
(Uploading the pictures in your reply itself is not possible as your pictures will be really big and there might be image size, width and height restrictions in websites)
After taking the pictures, upload it in any image site (such as imgur, flicker) or online storage (dropbox etc.,) as you wish but make sure that it is publicly available.
If you prefer anonymous uploading & sharing, visit imgur.com and click the image upload button on the top left corner. After uploading they will provide a list of URLs for the images you’ve uploaded.
Then share the list of IMAGE URLs in your REPLY. Also add the Megapixels of your camera.
Thank you for your time.
