Strange Artifacts with Brightness/Contrast Filter

I've applied the brightness/contrast filter to several stills and then on the last 6 frames, I pump the brightness to 100 to create a flash transition. However, on several of these, I'm getting very strange black artifacts after rendering. They appear on the edges of the frame.
They're not there before rendering, so it's not because that's what the image is supposed to look like at 100 brightness.
Has anyone ever experienced this or have any ideas how to fix it?
Thanks!
Cameron

Interesting development. I got a different transition from Eureka! plugins that's basically the same as the Buena one except it doesn't crash my system. Rendered it, and lo and behold! Same problem. The same kind of artifacts show up on the edges. The problem with cropping it is that then I just have to re-render and the artifacts come up again.
Any ideas?
Thanks!
Cameron

Similar Messages

Can't slice gradient with adjusted bright/contrast filter

I was playing around with gradients, and finally came up with something I wanted to try on my site. I'm taking a shade of yellow (#CC9933), then adjusting the colors with a brightness/contrast filter (brightness -81, contrast -8). But when I try to export a slice of the image, or just copy it to another Fireworks file for export, I am getting the original, bright yellow gradient, not the darker gradient with the adjusted brightness/contrast settings. What am I doing wrong?
I've attached a copy of the image I'm working with. It shows both the image with the adjusted colored gradient I want, and (to the right) how the slices are looking like.
Thanks much to anyone who can help

Thank you, Jim. I don't know what I was doing last night. Everytime I tried to export or copy from
the darker image, I'd get the lighter one in Dreamweaver. I just tried it after reading your posting, and it works fine now. I think the lesson for me is, don't work at 3:30 am.
Can you recommend which format (jpeg or png24) I should export as? The darker image, that is. I don't want the lighter one.
Thanks again.

Using Brightness & Contrast filter in FCP (Why the lighting/color shifts??)

I'm using the standard Brightness & Contrast filter that comes with FCP but when I do so the video I apply it to has crazy shifts in color and lighting, any help with getting rid of these or at least minimizing them would be much appreciated!
Thanks
Kevin

The Brightness and Contrast filter in FCP is worthless, plain worthless and does more damage than good. Same with the Proc Amp filter which along with the B&C filter should be eliminated from the FCP tool kit.
As Mr. X. has rightly stated, use the 3way. Get to know it intimately as it does darn near everything you need to accomplish.

Brightness Contrast filter won't stop flickering

My Brightness & Contrast filter is acting crazy. Most of the time, it works fine, but sometimes changes suddenly. Right in the middle of the clip, it will change brightness. Sometimes, it happens in brief flashes, sometimes constant, and other times, it rapidly flickers. This is only happening to certain clips, at complete random. Why is it doing this?
If anybody knows how I can stop this, please help.
Powermac G4 Mac OS X (10.3.9) using FCP 4.5

Tried trashing renders. still can't figure it out.
It seems to happen on both the external monitor and the clip itself. Tried exporting into new quicktime movies, also as still image sequences and the flicker still happens to these certain clips when the contrast filter is applied. Seems to be embedded in the footage itself, but doesn't happen when there's no filter.

How do I save an edited movie with brightness, contrast adjustments

I am using Quicktime pro ver 7.6.4(518.35) and I love its editing features especially the rotation and brightness adjustment features. Is it possible to save a move with these edits so they will be view correct with the basic Quicktime player? I have a movie that I edited the contrast and brightness and resave it as its original MOV file. The new contrast and brightness setting show up when I play the video on the same computer that has my Quicktime pro on it. But, when I play it on another computer with the basic Quicktime player the movie reverts to the original Contrast and brightness. Am I doing something wrong? I even tried to export it to another format and lose the video portion of the movie.
I would hope that I could fully edit a movie save it and give it to my family so they can view it like it was edited. Any suggestions?
Thanks.

Ok, after some searching, I found the export filter settings...
However, the exported video appearance does not match that of the source video with similar A/V settings.
Example 1 = Source video (.3g2) with A/V settings, recorded with screen capture software. *http://www.youtube.com/watch?v=ezvE6sUeUb0*
Example 2 = Source video with similar export filter settings (brightness/contrast) *http://www.youtube.com/watch?v=7tQYXWX17zQ*
When the video gets brighter, the brightness dims and when the video gets darker, the brightness increases... contrast settings seemed to be ignored.
All I can say is.. what the HECK?
It's pretty sad when I have to rely on screen capture software to get the desired result! Luckily the source video was taken with a cell phone, so there was no noticeable loss in video quality.

Brightness/Contrast issue

when I add the brightness/contrast filter to my footage and adjust it-the picture looks normal,until I render, in which case I get flickering multi-colored frames. I'm editing prores422HQ footage at 23.98fps. The timeline is set to the correct setting, and I've tried different render settings with no luck. Any help would be appreciated...

In support of Jim, (and I don't know what camera you are using when I say this). But pro gear, tends to record in a bigger colour space (higher colour resolution 4.2.2) therefore when adjusting (using FCP filters for example) there's greater latitude to tolerate the adjustments. In my early days of single chip, just a few minor tweaks in brightness contrast can have the image fall off really dramatically, so you do need to get the image right when you record it i.e. even a single chip will record a great image when lit well, but under-lit, it's very difficult to make adjustments using FCP filters.

LR 2.3 artifacts with NEF files

I get some strange artifacts with a small number of my NEF files (Nikon D700) and LR 2.3, Here is an example compared to Nikon's Capture NX2. Sharpening is different but it is not the root of the problem, artifacts are still visible with 0 sharpening and no other adjustment.

Too high of the "Recovery" slider value on an image like this will will cause an ugly discontinuity along the juncture between the brightest areas that the Recovery slider affects and the midtone areas that it doesn't, because the dimmer parts of the bright areas have been darkened more than the brighter parts of the dimmer areas, if that makes sense.
Use more of the Toning curve and less of the Recovery slider. Overuse of the Fill slider can have the same affect along the edge between the mid-tone ahd shadow-area boundary. For an extreme image, I'd probably export to Photoshop and use the more sophisticated and controllable Shadow/Highlights operation.

Brightness & Contrast control for SMP

I did raise my suggestion at Google Youtube discussion and wish that you could also provide an option for these controls to be available on 1.0 release, it is easy to implement using filter, useful for those using projector screen where audience could not see the dark themed video clearly could be compensate with brightness/contrast setting.

I mean a widget as creating a new button in the control bar.
For example an engineer might need to create a FastForward widget and add it to the control bar just after the play button. He'll need to configure the widget UI, it's layout and the logic that it should provide.
In in this use case, you might be able to create your brightness control widget. Won't this better then adding this behavior directly to the player code?

Set default Settings for Brightness/Contrast Slider

I am in the throes of editing several hundred pictures. My camera has a standard tendency toward too bright and not enough contrast. While editing about a hundred pictures in Photoshop Elements 3.0 last night, the brightness/Contrast and Shadow highlight slider suddenly retained the last setting - which GREATLY enhanced my editing efficiency! Alas, today it is back to normal - the Brightness/Contrast slider default is 0 for it's associated sliders and the Shadow Highlight option is again at 50%/0/0 for the three associated sliders.
Is there a way to set a default value for the associated sliders for each of these?
(I had installed Photoshop Elements 5.0 on a trial basis up until yesterday and also have Photoshop Elements 4.0 installed, but it is such a hassle to use, I just gave up on it (and 5.0 has the same issue as 4.0 - no concurrent file browser when editing.))

Can't help you with Shadows/Highlights, but you do have an option with Brightness/Contrast. Instead of going to Enhance>Adjust Lighting>Brightness/Contrast, go to Layer>New Adjustment Layer>Brightness/Contrast instead. Once you've established the parameters you want for Brightness and Contrast, you can open up additional pictures and drag-and-drop the adjustment layer onto each new picture, retaining the settings from the first adjustment. This also allows you to quickly tweak the settings on the succeeding pictures, as adjustment layers can be readjusted ad infinitum.
If only Shadows/Highlights had an adjustment layer option...
Chuck

Help with some strange artifacts - N580GTX Twin Frozr II/OC

hi and firstly thanks for any assistance on my issue
I bought a new N580GTX Twin Frozr II/OC card about a month ago and I have recently noticed some strange artifacts showing up.
Basically, I get light, almost pastel coloured blue and red 'ghosting' in 3d games (eg TF2, RO2), noticeable where the background is dark. They are only noticeble when I move in the environment, but they leave short-lived (perhaps 500ms), thin outlines of the edge of the image on the screen. The image might be the edge of a person graphic or the side of a wall for instance. These artifacts don't show up in 2d screens and the machine I have is perfectly stable.
I've got the latest official nvidia driver (280), don't overclock the unit and have a corsair hx 750 ps. I have read the faq and it suggests upgrading the bios, but considering it's only a few weeks old is there any other thing I should try first?
cheers!

Quote from: barkmann on 08-October-11, 06:18:31
Thanks for your assistance Svet.
http://www.mediafire.com/?ecwm7bwfyfow3iv
cheers
BIOS appear to be already latest version. It use different one.
Try to apply VGA reference clocks with Afterburner,
then retest

Strange Problem with InKeyset filter

I encountered a strange problem with inkeyset filter.I am trying to do some operations on the the selected set of keys within a cache. I have posted the psuedo code below
InKeySetFilter inKeySet=new InKeySetFilter(AlwaysFilter.INSTANCE,orgDestFlightSubset);
// Set of Keys for NamedCacheInstance
inKeySet.ensureConverted
(NamedCacheInstance.getCacheService().getBackingMapManager().getContext().getKeyToInternalConverter());
Extra code to be Added
System.out.println(NamedCacheInstance.entrySet(inKeySet).size());
Always prints 0 eventhoug the keys are present in cache. If i add the following code
NamedCacheInstance.get(orgDestFlightSubset.toArray()[0]) above printing it gives 1 as a result.
I am sure that object is in cache becoz cache.get() does not call the DB again
Can anyone tell me what could be the possible problem?

Hi,
user10866091 wrote:
I encountered a strange problem with inkeyset filter.I am trying to do some operations on the the selected set of keys within a cache. I have posted the psuedo code below
InKeySetFilter inKeySet=new InKeySetFilter(AlwaysFilter.INSTANCE,orgDestFlightSubset);The orgDestFlightSubset must contain keys in Java format which are existing cache keys.
user10866091 wrote:
// Set of Keys for NamedCacheInstance
inKeySet.ensureConverted
(NamedCacheInstance.getCacheService().getBackingMapManager().getContext().getKeyToInternalConverter());I assume NamedCacheInstance is a NamedCache instance obtained from CacheFactory.
In this case you should not call the ensureConverted method. This is called by Coherence on the storage nodes upon deserializing of the filter.
Try these changes.
Best regards,
Robert

Lens correction bug, bad artifacts with contrast adjustments...

Something has changed between LR3 and LR4 in the processing chain for lens corrections. Doing an extreme correction (e.g. using a LCP for a fisheye lens) with increased contrast causes bad halos at contrast edges. The effect doesn't occur with the same settings on LR3. It is almost as if the LCP is being applied after the basic controls rather than before?!?!?!?!
Ken

So I did a bit more checking. It is actually the highlights slider that does it - contrast just makes it more obvious. It is as if the highlights "masking" is getting created in the pre-transformed data and then distorted in some way when going through and extreme LCP like with a fish-eye. Here is an example, contrast at 100 and the "Strong Contrast" tone curve used in both. The one of the left has highlights at 100. Notice the "shadows" in the sky of the leaves, as if the mask was somehow stretched differently from the image data. This was with a fisheye lens and fisheye LCP. You can actually recreate the problem to a degree yourself with any image. Just apply any of the fisheye lens profiles from Adobe (Nikon 10.5mm for example) and look at high contrast regions near the edges of the frame with highlights set to 100%. You'll see shadows like this (again, easier to see with extreme contrast settings). Without an extreme profile applied no such effect.

Premiere Pro CS5.5 -very strange issue with the color tones and Preview-

I deal with a very strange and not usual problem in Premiere Pro CS5.5 (also the version CS5). What I try to do is just a simple color correction. The problem occurs when I try to use Three Way Color Corrector but it happens with Fast Color Corrector also.
When applying the Three-Way Color Correction and without changing anything else (just applying), can be seen in the preview of the soft how sudden changes in color tones. For example, the gray tone becomes a little more green, but also can be seen very easy a change in the other color tones too. In fact even RGB Parade show the same thing. This is very, very strange and unacceptable and saw that it happens when trying to use Colorista II too.
I tried the same thing in Sony Vegas Pro 11 and I downloaded the trial version of Edius 6 to convince me if the same thing happens. Not! In Sony Vegas and Edius everything is working correctly, I have not experienced these problems in the preview's of this 2 others softs.
This issue is very annoying because every possible color correction is based on what we see in the preview and if in this preview the tones are seen altered realize that can not make a decent color correction. So what happens here?!? I uploaded a small video demonstration to see very clearly about what I'm talking. You can see in the next link: http://vimeo.com/35317616

Yes Jim, you're right. No changes in the scopes when one just apply RGB Curves, Fast Color Corrector, RGB Color Corrector or the Three way Color Corrector (last three thanks to the new update 6.03). I already wrote that Adobe team has been able to fix this bug for some of the tools/effects.
But Brightness&Contrast? Change Color? Color Balance? Levels? MBLooks? Twixtor? Colorista II? Does it seem normally that all scopes or just one of them jump when you just apply one of these effects/tools? Not to say that in some situations even the tones change (especially in shadows&midtones).
You say this is something "very minimal". I say it is not so. I don't find normally to make a very detalied CC with Three way Color Corrector and then when applying Colorista/MBLooks, for example, the scopes jump and inclusively some tones may be influenced. And I left clear examples in this topic where you can see that this is possible. I don't know if this is "very minimal" or not, but is really so impossible to edit in Premiere without this "very minimal" issue?!? How can it be possible in other softs (Edius, Media Composer, Vegas Pro) and in Premiere not?!?
One more thing: many of us use intermediate codecs in the editing process. Do you find normally that a AVCHD video have the lumninance at approximately 110IRE, to export it directly to Cineform and then import it in Premiere, and the waveform shows the luminance at 100IRE?!? How is this possible?!? So the AVCHD video have a 110IRE luminance, you convert this video to Cineform without changing anything, and then this Cineform video have the luminance at 100IRE?!? And anyone can verify this example.
So, how can one trust in this soft?!?

Brightness/Contrast of an indexed image

Hi all,
Is it possible to change the Brightness/Contrast of an indexed image?
I've tried that with the following code:
// Brighten the image by 30%
float scaleFactor = 1.3f;
RescaleOp op = new RescaleOp(scaleFactor, 0, null);
bufferedIm = op.filter(bufferedIm, null);but it outputs:
java.lang.IllegalArgumentException: Rescaling cannot be performed on an indexed imageThanks in advance

Just roll your own: get the color components of the IndexColorModel, rescale them, build a new
IndexColorModel from that and put that together with the original WriteableRaster to form the
rescaled BufferedImage:
import java.awt.*;
import java.awt.image.*;
import java.io.*;
import java.net.*;
import javax.imageio.*;
import javax.swing.*;
public class RescalingICMExample {
    public static void main(String[] args) throws IOException {
        URL url = new URL("http://weblogs.java.net/jag/bio/JagHeadshot-small.jpg");
        BufferedImage original = ImageIO.read(url);
        BufferedImage index = convertType(original, BufferedImage.TYPE_BYTE_INDEXED);
        JPanel p = new JPanel(new GridLayout(2,4));
        addToPanel(p, original, "original image");
        addToPanel(p, index, "indexed version");
        float[] scales = {1f, 1.1f, 1.2f, 1.3f, 1.3f, 1.3f};
        float[] offsets = {48, 32, 16, 0, 16, 32};
        for(int i=0; i<scales.length; ++i) {
            float s = scales;
float o = offsets[i];
addToPanel(p, rescale(index, s, o), "scale=" + s + ", offset="+o);
JFrame f = new JFrame("");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setContentPane(p);
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
public static BufferedImage convertType(BufferedImage image, int type) {
if (image.getType() == type)
return image;
BufferedImage result = new BufferedImage(image.getWidth(), image.getHeight(), type);
Graphics2D g = result.createGraphics();
g.drawRenderedImage(image, null);
g.dispose();
return result;
static void addToPanel(JPanel p, BufferedImage image, String title) {
JLabel label = new JLabel(new ImageIcon(image));
label.setBorder(BorderFactory.createTitledBorder(title));
p.add(label);
public static IndexColorModel rescale(IndexColorModel icm, float scaleFactor, float offset) {
int size = icm.getMapSize();
byte[] reds=new byte[size], greens=new byte[size], blues=new byte[size], alphas=new byte[size];
icm.getReds(reds);
icm.getGreens(greens);
icm.getBlues(blues);
icm.getAlphas(alphas);
rescale(reds, scaleFactor, offset);
rescale(greens, scaleFactor, offset);
rescale(blues, scaleFactor, offset);
return new IndexColorModel(8, size, reds, greens, blues, alphas);
public static void rescale(byte[] comps, float scaleFactor, float offset) {
for(int i=0; i<comps.length; ++i) {
int comp = 0xff & comps[i];
int newComp = Math.round(comp*scaleFactor+offset);
if (newComp < 0)
newComp = 0;
else if (newComp > 255)
newComp = 255;
comps[i] = (byte) newComp;
public static BufferedImage rescale(BufferedImage indexed, float scaleFactor, float offset) {
IndexColorModel icm = (IndexColorModel) indexed.getColorModel();
return new BufferedImage(rescale(icm, scaleFactor, offset), indexed.getRaster(), false, null);

Flickering in clips when brightness/contrast adjustments applied

In CS3 I apply brightness and contrast changes to a clip. When I view that clip in the preview monitor, and also when I view that clip after exporting to DVD on a television, there are intermittent random quick changes in the brightness. Screen appears to flicker irregularly. Any ideas as to why this is happening? It does not seem to happen on every clip I make changes on, but it is enough of a problem to be distracting. Thank you.

Dave, your responses are showing up blank. Are you useing email to respond? If so there must be a biug.
Im going to guess at you r problem based on the symptoms. Im guessing you used the Auto Bightness/contrast filter. The auto filter will do this because by dwfault it adjust every frame. Ergo you will see starl adjustments being made frame by frame. The fix is to increase the temporal smoothing parameter; that will cause the auto filter to look fwd and back in time and consider x frames before adjusting. But this will increase render times.
The other solution is to use the manual ver of the filter and not let it auto adjust.

Strange Artifacts with Brightness/Contrast Filter

Similar Messages

Maybe you are looking for