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Search results for "luminance"

How to Color Correct an Image

So you got a brand new DSLR, but when you start to take pictures, you notice a strange color tint on some or all of your images. Some may seem like they have a blue tint while others appear almost orange. Or maybe certain colors just aren’t quite “right”. One of the most common questions for new users of Digital Photography is how to color correct their images. The good news is that there are a few quick fixes available that are easy to learn and use.White BalanceThe most common cause of an... continue reading

Should you always use a tripod?

Almost always I read in photography tutorials to keep my ISO as low as possible and if necessary, use tripod to allow slower shutter speed, and let in more light to the camera sensor. But is it always necessary to use a tripod? In the end everyone must admit, that is quite limiting, especially when we are talking about flexibility and creativity. Ok, maybe modern tripods are more adjustable, but still you need time to set everything up. Is that necessary?I believe in using a tripod in few examples:... continue reading

How to Make Your Worst Photo Your Best Friend – Part I

You made all the plans. Packed your computer bag with all the equipment you would need. Scoped out the perfect spot. Set up the shot taking into consideration the correct ISO, shutter speed, aperture, filters, remotes, tripod, etc., etc., etc.You get home to download your shoot to your computer with baited breath, sure you have “that one picture”, and discover the image was an epic fail. So you move it to the trash and carry on. Right?Not so fast. Stop a minute and look at your failed images.... continue reading

A typical Chinese architectural style

This is a typical Chinese architectural style. Chinese people like red lanterns lighting at night may also have auspicious meaning, so people like to put it hanging in the doorway.This photo due to the brightness of the sky and the house is not the same, I'm late to improve the brightness of the shadows so that the luminance of the same photograph, while increasing the saturation point, make colors more vivid.Photo Location: Yunnan Province, China  continue reading

About video codecs YUV 4.2.0 v. 4.2.2

Hi. Do you want to start selling video footage and don't know what camera to buy? Forget about prices, check this first! Take a SD Card with you and ask seller to let you shoot a small video. Come home and check video codec (use VLC for this, Tools - Codec information).You will see something like Planar 4:2:0 YUV or Planar 4:2:2 YUV.What this means?Short explanation: 4:2:2 is better than 4:2:0. So, that camera is the winner.Long explanation: 4:2:0 format requires 4*8+8+8=48 bits for... continue reading

Noise Reduction Tools: A Review

As a photographer, you always get to encounter situations that are worth capturing but the light is extremely unfavorable. If you have a tripod, you are good to go. But that doesn't always help. Recently while trying to make an HDR of a church interior, I wasn't allowed to set up the tripod because it would obstruct flow of tourists. The church was beautiful and I wanted an HDR, whatever happens. So I had to step up ISO to 1600 (still got a shutter speed of around 1/13 only). Thanks to Canon's outstanding... continue reading

Workflow for your compact camera photos

Don't have a DSLR that produces very high quality images? Read on!Modern DSLR cameras are highly flexible, fast and produce RAW format images which contain all the data produced by the image sensor. That means none of your data is lost and most of the adjustments can be done later to achieve impressive results. But what if you only have highly compressed JPEG images only? What if you shot a photo at 14MP and it is hardly 2MB in size?That simply means you lost a LOT of color information because... continue reading

The Photography side of Microstock-beginner to Masterclass

Call this,if you like, a "Photographer's Notebook" -these are lessons learned in almost 50 years of photography-aimed mainly at the beginner in the game of stock; But hopefully more advanced practitioners may pick up a trick, or wrinkle here and there. Regards, KenI believe it is best to take baby steps- So before you do anything, take these Three steps:A)Set your Focusicons - detach lens, (so you are adjusting focus on focus point, not image) - adjust dioptre (next to viewfinder)... continue reading

High Dynamic Range Images (HDR)

Since the last camera upgrade last year (details here), I've been experimenting with the HDR techniques. My previous cameras did not have the exposure auto-bracketing function, and this function was one of the reasons why I have decided to buy a Canon 450D.HDR comes from Higy Dynamic Range images and refers to images having a greater dynamic range of luminance between the light and darker part of a scene than normal photography techniques. Its intention is to more accurately render the wide range... continue reading

Making HDR Pictures (Part IIC)

HDR pictures generated by Photomatix per se are not good enough for stock photos.There are three main defects that needs to be removed before it is of suitable quality, namely artefacts, high noise levels, and severe chromatic aberrations.These defects exist even when maximal effort have been taken in the capture (Part I) and the generation (Part IIA and Part IIB) to minimise them. But now there is a high possibility - more than 90% from my experiences - to improve its quality to an acceptable... continue reading

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