sensors

Sandblaster clears for landing

There are many challenges in waging war for oil, not the least of which is fighting in a big sandbox--it's hard on soldiers and it's murder on helicopters.

Enter the Sandblaster. This is a helicopter avionics system commissioned by DARPA that integrates advanced flight controls, a "see-through" sensor, synthetic vision and data fusion to allow the pilots to fly safely in a zero-visibility, howling haboob, according to Sikorsky Aircraft Corp.

Using the Sikorsky system, the pilot has only to press a button to bring the chopper from en-route flight to a low, non-drift hover over a … Read more

'Swarm' converges on energy use in buildings

To make buildings more efficient, Regen Energy is equipping them with a bunch of miniature brains--in the form of wireless mini-controllers.

The Toronto-based start-up announced on Monday partnerships with solar energy-monitoring firm Fat Spaniel Technologies and with carbon-management software company Zerofootprint to optimize buildings for efficiency and clean power production.

There are already automation systems that allow commercial building managers to view data from HVAC systems or lights and set policies to improve energy efficiency.

Regen Energy CEO and co-founder Mark Kerbel asserts that its system of building a "swarm" of autonomous controllers is a quicker and less … Read more

Sony SLR sensor ranks below Nikon, above Canon

Three midrange Sony SLRs now are included in DxO Labs' measurements of image sensor performance, and the Alpha A700 proves to be reasonably competitive.

Sony's A700, which costs about $1,100 with an 18-70mm lens, has a score of 66.3 on the test, which calculates how well the sensor handles color, a range brightness and darkness, and low-light shooting. That puts it behind the top-scoring camera with a comparably sized sensor, the Nikon D90, almost ties it with the Pentax K10D and Nikon D300, and gives it a a few points' lead over Canon's 40D and 50D.

Meanwhile, the A200 scores 62.9 and the A300 an even 64, according to the DxOMark Sensor test results that were updated Tuesday. A five-point difference makes a difference of about 1/3 stop in exposure, DxO says, meaning that a higher-scoring camera can attain the same raw image quality as a rival even though the higher-scoring camera is using a faster exposure or higher ISO.

DxO Labs, a French company, makes a business of measuring camera image quality, developing technology for image-processing hardware and software, and selling software to convert the raw files produced by higher-end cameras into less flexible but more convenient formats such as JPEG. The DxOMark score measures sensor performance based on the raw file, a foundation for overall image quality but only a facet of a camera's overall performance. … Read more

Olympus: 12 megapixels is enough for most folks

A correction has been made to this story. See below for details.

LAS VEGAS--Olympus has declared an end to the megapixel race.

"Twelve megapixels is, I think, enough for covering most applications most customers need," said Akira Watanabe, manager of Olympus Imaging's SLR planning department, in an interview here at the Photo Marketing Association (PMA). "We have no intention to compete in the megapixel wars for E-System," Olympus' line of SLR cameras, he said.

Instead, Olympus will focus on other characteristics such as dynamic range, color reproduction, and a better ISO range for low-light shooting, he said.

Increasing the number of megapixels on cameras is an easy selling point for camera makers, in part because it's a simple concept for people to understand. Even though having more megapixels can enable larger prints and enlargement of subject matter through cropping, adding megapixels comes with some drawbacks.

For one thing, smaller pixels can mean more noisy speckles at the pixel level and can reduce the dynamic range, so brighter areas wash out and darker areas become swaths of black. For another, images take more room on memory cards, hard drives, and Web servers, and cameras need more powerful image processors to handle them. And yesteryear's cameras already had plenty of pixels for making 8x10-inch prints, a size few people exceed. … Read more

New window opens on camera sensor cleaning

LAS VEGAS--Camera cleaning accessory maker LensPen announced a new product to help remove dust, hairs, specks, and other detritus that sticks to digital SLR sensors.

The $59.95 SensorKlear Loupe, announced here at the Photo Marketing Association (PMA) show, is a magnifying glass that attaches to a camera's lens mount. Its four battery-powered LEDs illuminate the sensor, and unlike rival products such as VisibleDust's Sensor Loupe, a gap in the side allows you to clean off the sensor.

Unsurprisingly, the company recommends use of LensPen SensorKlear II to actually clean off the schmutz. The pen and loupe together … Read more

Biometric fingerprint scanners come to Netbooks

"I put down $500 for a Netbook and all I got was an integrated Webcam!" Don't complain. That's not a bad deal, but if you must, I'll see that Webcam and raise you an integrated biometric fingerprint scanner.

This week, UPEK announced the availability of biometric fingerprint scanners for Netbooks and other Mobile Internet Devices (MIDs) with its TouchStrip TCS5 Fingerprint Sensor. Along with the sensor is the dedicated touch-based Fingerprint Suite Starter software that allows users to access password-protected Web sites with the swipe of a digit.

So as users get caught up in … Read more

CNET News Daily Podcast: SLRs catching up to higher-end digicams?

The results of a new camera benchmark test suggest that high-end SLRs cameras from Canon and Nikon may be catching up with medium-format professional models used almost exclusively by professionals. CNET News reporter Stephen Shankland explains. This and other headlines in Tuesday's CNET News Daily Podcast.

Listen now: Download today's podcast

Today's stories:

Motorola's fourth-quarter loss hits $3.6 billion

Sensor quality: SLRs erode medium-format lead

Retrevo launches DTV coupon exchange

GM eyes San Francisco, Washington for Chevy Volt

IBM to send blazing fast supercomputer to Energy Dept.

Google on trial in Italy

Sensor quality: SLRs erode medium-format lead

It looks like Canon and Nikon weren't blowing smoke when they said their high-end SLRs cameras will compete with medium-format digital cameras used almost exclusively by professionals.

Given the image quality advantages that SLRs with larger "full-frame" sensors have over mainstream and much less expensive models with smaller processors, one might have expected another quantum leap from costly high-end medium-format digital cameras with sensors twice the area of top-end SLRs. Not so, according to new DxOMark Sensor test results set for release Tuesday by French test and measurement firm DxO Labs.

The company tested image sensors from several medium-format cameras--the Mamiya ZD Back, Leaf Aptus 75S, Hasselblad H3DII 39, and Phase One P45+. These are the sorts of cameras used by fashion photographers and others who need lush tones, fine detail, and lots of megapixels to handle big photos such as magazine spreads.

But none outperformed the Nikon D3X SLR, whose score of 88 gives it the current top rank on DxO's sensor tests. … Read more

Tests show ups and downs of Four Thirds cameras

Panasonic's $670 G1 and Olympus' $540 E-520 and $450 E-410--that show both the advantages and disadvantages of the Four Thirds standards the companies use.

The Four Thirds system governs image sensor sizes and the mounting mechanism for interchangeable lenses on the companies' SLR cameras, and the companies announced a new variation called Micro Four Thirds for smaller cameras that have SLRs' interchangeable lenses but not SLRs' "reflex" mirror, which directs light through an optical viewfinder before a shot is taken.

Four Thirds SLRs have a smaller sensor than lower-end SLRs from market leaders Nikon and Canon, which poses image quality challenges because there's less surface area to gather light. However, the sensor size is the same for Four Thirds and Micro Four Thirds, which means that cameras using the latter have a much larger sensor than typical compact cameras have. … Read more