Posts tagged ‘Image Quality’

Autofocus issues with the Motorola Droid

droid_tnOne of the strangest Image Quality issues we’ve seen: Apparently the autofocus has a timing issue which causes it to have “Periods” where it doesn’t work properly.  A description of the syndrome:

“There’s a rounding-error bug in the camera driver’s autofocus routine (which uses a timestamp) that causes autofocus to behave poorly on a 24.5-day cycle,” said Morrill. “That is, it’ll work for 24.5 days, then have poor performance for 24.5 days, then work again.”

We’re used to 28 day cycles [/bad joke].    Look for a software fix to be magically beamed to your droid shortly.

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Kodak EasyShare M381: 12 Megapixels and lots of image quality problems

easyshareM381Despite the 12 megapixel sensor it packs, this low-budget ($170) camera appears plagued with numerous image quality issues.  The review rules it “acceptable for casual snapshots”.  (Read: it could be a LOT better)

“In my informal tests for image quality, I noticed inconsistencies in exposure. Shots taken within a few seconds of each other in the Smart Capture mode varied noticeably; some images looked fine, while others seemed overexposed.”

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David Pogue on Big Sensors in Small Cameras

Once again David Pogue crusades for truth in Image Quality, remarking on the new crop of high quality devices with big sensors:

“The best overall predictor of image quality, though, is the size of the sensor inside. Big sensors absorb more light, so you get better color and sharper low-light images. Small sensors pack too many light-absorbing pixels into too little space, so heat builds up, creating digital “noise” (random speckles) in your photos.”

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6 megapixel – the best picture quality

Image engineering, a German company, has launched an initiative to proclaim the sensibility of not getting crazy packing insane amounts of megapixels into tiny sensors. They assert the best number of megapixels is Six.

“To increase the pixel count, the sensor has to be divided into smaller and smaller pixels. The result is a decrease in sensitivity of the camera and an increase in noise because the amount of light collected by a single pixel is smaller.”

[Read more at]

In summary, To paraphrase Monty Python: “Six shalt be the number of megapixels, and the number of megapixels shalt be six. Five shalt it not be, nor either four, Seven is right out.”

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Google Tech Talk: Image Quality Explained

Norman Koren explains how to analyze Image Quality using Imatest.
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The Lie of Interpolation

Look at this ebay auction. Here the seller claims a Fifteen Megapixel camera, but if you read closer, the pixels are Interpolated. This means the image is just resized to be more (blurred) pixels. A gimmick that is a waste of memory and whose only purpose is to deceive consumers into believing that they’re buying a high Megapixel device. Read on to find the camera actually only has 5.0 Megapixel!
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Megapixel Myth Launches web site 6/21/07 launched on June 21st 2007. This web site was created to inform and educate consumers of digital cameras about all the factors that affect image quality. Educated consumers that know that there is mre to a camera than its megapixels will put forces on the manufacturers that will enable new lens, sensor, and processing technologies to succeed. This will help improve the image quality of cameras big and small.
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