Question about Sony Cyber-Shot DSC-H1 Digital Camera

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Moire patterns A few months ago I decided to 'wet my toe' with digital photography and I bought very cheap Mustek GSmart Mini 2 digicam. As you might expect with a $60 camera the image quality is a bit limited due to the fixed focus lens, low resolution (1.3MP) and poor low light performance. Anyway, now that I can see the advantages of digital photography I'm planning on buying a decent camera e.g. Canon S230 to overcome the problems of the Mustek. One problem that the mustek has is moire type patterns on some images particularly where there are close parallel lines in the picture. The question is, is this a problem because its a cheap camera or is this a general problem with digicams. Is the Canon likely to suffer the same problem ? Thanks Simon I have a SonyDSC-H1 and use it for house appraisals. With clapboard sided homes I get a moire pattern from the boards running across the house. I am not really sure how to get rid of this problem but a professional photographer told me to use the least "quality" settings. Seems the problem is lessened but the pixels are bigger? What to do.

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  • ngobikrishna Jun 24, 2008

    Hi, this is gobi from chennai, India, Yesterday i bought olympus sp570u , in this some pictures are having thin horizontal line on the left side... is it a problem with ccd or all the digi camera's are having this kind of problem?

    And how to rectify it... or I have to replace the camera... give me a solution



    regards,

    gobi

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The moire pattern is most likely due to poor lens resolution and a resolution that conflicts with the close pattern of the house design. By lowering the resolution. you are making the receptors "bigger" so they dont pick up the smallest details. if you get a larger MP camera, you can use the best resolution and the pattern will look natural. It is as if you are right in the "sweet spot" for the moire pattern to manifest itself. Another way to combat this is to slightly tilt the camera as the pixels are lined up like bricks in a wall. and the horizontal patterns will not be overlayed onto the horizontal biasing of the CCD.

Posted on Mar 02, 2008

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The following describes the symptoms, cause and prevention of the Moire effect. Symptoms of the Moire effect When you are shooting a subject that has a fine regular pattern such as stripes or plaids, a ripple that does not exist on the subject sometimes appears in the image. This effect is called the Moire effect. Why does the Moire effect occur? Digital cameras and camcorders are equipped with imaging devices such as CCD sensors and CMOS sensors that have pixels that are finely aligned horizontally and vertically that convert light into electronic signals. When the pixels and the pattern on the subject overlap slightly misaligned, an interference pattern occurs and a ripple that does not exist on the actual subject may appear. This is the Moire effect. Preventing the Moire effect You can reduce this effect by changing the distance, zoom setting or the angle of the image. If you are using a camera with manual focusing, the Moire effect can be reduced by simply changing the focus slightly. Reference You may find another Moire effect displayed on the LCD of the camera. As this is caused by the aligned pixels on the LCD, this effect does not necessarily appear in pictures you have taken.

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