CCD artifacts
These are just columns of pixels that do not work properly. There are several reasons for a column to be bad (ranging from electronic to mechanic)
Basic CCD image processing - ESO.org
A CCD is an electronic detector constituted by many square photosensitive "pixels". When a photon (light particle) hits one of these pixels, the information is ...
Image artifacts - Telescope and camera defects - Stereo NASA
The most noticeable example of a camera defect is shown below. This is a small fiber on the surface of the Charge-Coupled Device (CCD) camera ...
What Causes Blooming Artifacts in Microscopic Imaging and How to ...
Blooming occurs in CCD (Charge Coupled Device) sensors under conditions in which the finite charge capacity of individual photodiodes or the ...
CCD Saturation and Blooming - Hamamatsu Learning Center
Saturation and blooming are related phenomena that occur in all charge-coupled device (CCD) image sensors under conditions in which either the finite charge ...
3.2. Real dark current: noise and other artifacts - Astropy
The dark current on modern CCDs, even relatively inexpensive ones, is very small. In a typical exposure the dark current is likely smaller, maybe much smaller, ...
Anomalies and Artifacts - STScI
Bad CCD columns · Saturated blobs in darks · Bias offset between WFC amplifier quadrants · Bias striping due to 1/f noise on the bias reference ...
New form of CCD (and CMOS?) artifacts discovered - aavso
In short, the artifact seems to be introduced at the ADC stage and it adds a negative offset to a pixel's ADU value that is very strongly ...
Residual images in charged-coupled device detectors
thermal noise, and other electronic artifacts become impor- tant. The ... ments, TC-255 CCD, front side illuminated, 320⫻240 pix- els, 10 m pixel ...
Removing CCD artifacts from grabbed images
One way to clean the grabbed images of these artifacts is to use MimFlatField(). This function uses a flat-field image processing context to store processing ...
CCD vs. CMOS: Image Artifacts to Consider with CMOS ... - Adimec
A consideration with CMOS image sensors are the different types of defects present and whether the camera manufacturer corrects for them.
Flat Fields and Correcting CCD Images - Physics and Astronomy
If the the telescope, camera and CCD were ideal and introduced no artifacts into the light, each pixel on the CCD would record 10,000 electrons. In general ...
Introduction to CCD Imaging - Moravian Instruments
Companies producing CCD sensors followed this convention and created CCD ... All these effects alter image brightness and cause not only aesthetics artifacts, but ...
4.4 Bright Object Artifacts - STScI
Blooming up and down a CCD column occurs when more than about 90,000e- (the full well capacity) are collected in any pixel. When the pixel is full, the charge ...
... artifacts can be present in your image. Those of us who are using ccd sensors for imaging are familiar with the so-called “column defects ...
Unknown CCD artifact - Experienced Deep Sky Imaging
Unknown CCD artifact - posted in Experienced Deep Sky Imaging: Anybody know what is causing this kind of artifact near some stars in my ...
How CCD Cameras Work - Starizona
... artifacts present due to the nature of the CCD. Image processing software allows the removal of most of these artifacts. Below is a processed image. Above ...
Artifacts on CCD - ZWO User Forum
I recently noticed that my out of focus image shows the artifacts seen below. My camera (ASC1224) has only been used about 20 times.
Artifacts in sunset photography - Green Flashes
This reflection about the center of the image is a dead giveaway that the spurious image is a ghost. Image taken with a CCD camera, showing green ghost Such ...
1.1. Understanding an astronomical CCD image - Astropy
Real dark current: noise and other artifacts · 3.3. Handling overscan and bias ... An offset voltage called bias is applied to the CCD chip to ensure there are no ...