contrast

The other day I wrote an article titled "When should I upgrade my HDTV?" The general thought was that TV performance, while not exactly hitting a plateau, had slowed enough that TVs even a few years old perform pretty close to the new models.

In the world of front projection, though, it's an entirely different story. The level of performance you can get for very little money is incredible. What were once considered "budget level" projectors now easily outperform $10,000+ models from just a few years ago.

Time to upgrade? Perhaps.… Read more

The cutthroat competition among HDTV-makers inspires constant efforts to one-up the other guy, and the end result are confusing, misleading claims that do little to tell shoppers about true performance and picture quality. At CNET I try to cut through a lot of that "specmanship" in my reviews, and many other critical voices are fighting the good fight too.

"Display Myths Shattered: How Monitor & HDTV Companies Cook Their Specs" collects numerous misleading HDTV and PC monitor specs and debunks them one by one. The author, Raymond Soneira, takes aim at unnecessary--and often harmful to picture … Read more

Finally there's a free image editor worth reviewing. So many Photoshop wannabes have failed to live up to expectations, which admittedly are high. But PhotoFiltre stands on its own as a basic, capable image editor.

The first good news is the program's user interface, which is very clean and not at all overwhelming, unlike many graphics tools. Menu items line the top of the window with their respective shortcut buttons below in two rows. Rather than using moveable color and tool palettes, PhotoFiltre places them in a narrow right-hand sidebar, which leaves plenty of room for images. We … Read more

When the Kindle 2 was first released, we reported on the small controversy over how dark the text and images appeared on the screen compared to the original Kindle. Held side by side, the original appeared to have better contrast and the text appeared slightly darker--and slightly easier to read.

Well, when we reviewed the new AT&T-powered version of the Kindle 2, which Amazon calls "Kindle Wireless Reading Device (6" Display, Global Wireless, Latest Generation)," we noticed that the text appeared darker on this model than on the older Sprint-powered Kindle 2. It's not … Read more

Face Smoother offers to help clear up blemishes and improve photo quality, especially with shots of people. While it provides all the proper tools to get this done, the program's limitations are frustrating.

The program's interface was its best attribute. Allowing us to learn onscreen with helpful command icons, we didn't need to utilize the program's slightly disorganized Help file. The program offers options to sharpen, adjust, smooth, rotate, and resize any photo. Rotate, Resize, and Adjust were the most user-friendly options, as they were able to be customized by sliders or entering in new dimensions. … Read more

Whenever a next-generation version of a product is launched, inevitably you get comparisons to the previous model--and what the older model did better. Well, in the case of the Kindle 2, the nitpicking is in full swing as several blogs have taken up the debate over whether the Kindle 2's text is lighter than the original Kindle's.

On Joe Wikert's Kindleville blog, one reader lodged the following complaint:

Side-by-side, the K1 text is bolder and jumps out at you. It's as if the low fidelity, dot-matrix-like typeface of the K1 is better suited for the reading experience than the feathered, crisp, 16-shades of gray of the K2. After 30 minutes of reading on the K2, my eyes get tired and I actually experience mild dizziness, headaches. Never experienced that with the K1.

In the Mobileread forums, a reader posted that he had decided to return the Kindle 2 after he noticed "low contrast on text as compared to kindle 1...text on kindle 1 is really good it is dark and somewhat thicker than kindle 2 at the same font size, menu is normal on kindle 2." He said he spoke to a Kindle representative (we assume a customer service person), who said he'd heard complaints from other Kindle 2 users as well.

On Amazon, there's a thread titled, "Amazon: Please make the text darker on Kindle 2!"

The thread's starter, BMK, is calling for an e-mail campaign to encourage Amazon to update the firmware on the Kindle 2 to fix the alleged problem.

"Kindle 2 is capable of producing darker text than the default setting, which is light, thin, and difficult to read for many people. Customer Service has reportedly told at least one person that the standard text could have been a darker shade of gray/black than the one that was chosen."

So, what's the deal? Are people imagining things or is there really an issue? … Read more

Contrast ratio should be black and white. Taken at face value, it's the ratio of the light level (luminance) the display produces when fed a white signal to the luminance when it's fed a black signal. Unfortunately, it's probably the most misused, inflated, and ultimately misleading specification used to describe HDTVs today.

At the 2009 Consumer Electronics Show, manufacturers quoted contrast ratio specs of 1,000,000:1 or 2,000,000:1 for upcoming LED-based LCD displays (Vizio and LG, respectively), which are similar to the specs quoted by Samsung and Sony for their current LED models. Those numbers sure do sound impressive, but what do they mean in the real world?

Very little. It's true that in general, a higher contrast ratio can indicate that the display produces a deeper level of black, with all of the picture-quality benefits that brings--but then again it might not. Despite the million-to-one contrast ratios of the Samsung and Sony LED sets we reviewed, we observed better black-level performance in the Pioneer PRO-111FD. Pioneer doesn't publish a contrast ratio spec for that television, but has claimed that its black levels are so deep as to be "immeasurable." … Read more

Vendors want to sell you stuff! There, it's finally been said. Don't believe me? Well, you wouldn't be the first, but thankfully, I have evidence.

Within the last year I've seen a new spec, called dynamic contrast ratio (DCR), tossed around for computer displays. If you didn't know before, contrast ratio is simply the difference between the darkest blacks and the brightest whites a given display can produce.

Typically, computer displays have a contrast ratio of about 1000:1. However with DCR, you'll see numbers like 4000:1, 10,000:1, and higher. Basically, it's just a way for Company A to proclaim, "Don't buy Company B's monitor because it has a much lower DCR than our monitor." Since more and more vendors have been pushing this, I want to delve further into how they're getting these numbers. I also covered this topic in less detail (but with a sexy voice thrown in) in episode 2 of the Inside CNET Labs podcast.

Before a monitor is released to the public it goes through a bunch of testing in the vendor's own lab. These tests produce the specs that the vendor will then publish with the release. Specs like maximum brightness, pixel pitch, pixel response time, contrast ratio, and dynamic contrast ratio are all determined in the vendor's own lab.

When testing normal contrast ratio, vendors use a device that measures light to determine how much light is emanating from a display while it's showing both a completely black and a completely white screen. They then take each number, do a bit of math, and come up with the contrast ratio. … Read more

In a time when CNET's two top-rated HDTVs of the year are Panasonic's TH-50PZ800U and Pioneer's PDP-5020FD, we have to wonder why a salesperson would recommend flat-panel LCD HDTVs at the rate that J.D. Power and Associates claims in a recent report.

The report, which surveyed more than 2,000 shoppers on their experience in big-box electronic retailers, a specialty television retailer, a mass merchant, and a warehouse store, found that retail salespeople recommended LCDs over plasmas at a three-to-one rate.

Sure, plasmas have a long list of supposed failings: they're allegedly bulky and power hungry, and have image burn-in issues and leaks, and a short lifespan. However, most of these problems--image burn-in being the most common with early plasma sets--have been resolved on modern plasma displays.

According to the report, however, "37 percent of salespersons warned their customers that images may be permanently burned onto the screen of plasma TVs." The lifespan argument doesn't hold up either, as both LCD and plasma lifespan claims are basically the same now at 60,000 hours each. And, with LCDs still costing more at equivalent screen sizes, it's certainly convenient for retailers to promote the LCD technology over its less expensive rival.… Read more