DeadPixel test on D7 TIFF images

I've tried a DeadPixel test with deadpixel.exe on my D7. Not a single deadpixel shows up, is this normal, should there be some deadpixels ?

If anyone have tried the program on a D7 TIFF image, let me know.

Besides that, i've never seen any camera taking this good pictures. It might not be the fastest camera, but...--Jorn

the only meaningful test for dead pixels is with RAW images.

Any other file format introduces the possibility of 'artifacts' caused by software conversion of colors and resolutions. You have got to loow at the raw output of the image sensor, the only way to do that is with the RAW image format.

Retest with RAW images when you have the time.

Jorn Ramnes said:

I've tried a DeadPixel test with deadpixel.exe on my D7. Not a
single deadpixel shows up, is this normal, should there be some
deadpixels ?

If anyone have tried the program on a D7 TIFF image, let me know.

Besides that, i've never seen any camera taking this good pictures.
It might not be the fastest camera, but...
--
Jorn

Click to expand...

The problem with the RAW format is that the DeadPixel.exe dont recognice the file as a TIFF, JPG or Olympus RAW format, i get an error message. But i tried again with SuperFine Quality, and the program reported one dead and one hot pixel at the edge of the image. And i had to zoom in to the maximum in PhotoShop to see this two pixel.

But anyway, thanks for the answer.
Jorn

newsposter said:

the only meaningful test for dead pixels is with RAW images.

Any other file format introduces the possibility of 'artifacts'
caused by software conversion of colors and resolutions. You have
got to loow at the raw output of the image sensor, the only way to
do that is with the RAW image format.

Retest with RAW images when you have the time.

Click to expand...

--Jorn

lets clarify things....

Are you testing for dead pizels on a minolta camera using a tool designed for minolta raw files?

There is no single standard for camera raw image files.

Jorn Ramnes said:

But anyway, thanks for the answer.
Jorn

newsposter said:

the only meaningful test for dead pixels is with RAW images.

Any other file format introduces the possibility of 'artifacts'
caused by software conversion of colors and resolutions. You have
got to loow at the raw output of the image sensor, the only way to
do that is with the RAW image format.

Retest with RAW images when you have the time.

Click to expand...

--
Jorn

Click to expand...

I'm using a program called DeadPixel.exe which is not from Minolta. Do Minolta have a program where i can test for dead pixels ? Can i test for dead pixels in DIVU ? I have a D7 camera.

Jorn

newsposter said:

Are you testing for dead pizels on a minolta camera using a tool
designed for minolta raw files?

There is no single standard for camera raw image files.

Jorn Ramnes said:

But anyway, thanks for the answer.
Jorn

newsposter said:

the only meaningful test for dead pixels is with RAW images.

Any other file format introduces the possibility of 'artifacts'
caused by software conversion of colors and resolutions. You have
got to loow at the raw output of the image sensor, the only way to
do that is with the RAW image format.

Retest with RAW images when you have the time.

Click to expand...

--
Jorn

Click to expand...

Click to expand...

--Jorn

Jorn Ramnes said:

Do Minolta have a program where i can test for dead pixels ? Can i
test for dead pixels in DIVU ? I have a D7 camera.

Click to expand...

Have a look to http://home-4.tiscali.nl/~t800373/

-- Patrick

Patrick Porlan said:

Patrick Porlan said:

Do Minolta have a program where i can test for dead pixels ? Can i
test for dead pixels in DIVU ? I have a D7 camera.

Click to expand...

Have a look to http://home-4.tiscali.nl/~t800373/

-- Patrick

Click to expand...

I've downlade the software and i'll try it later.
--Jorn

Jorn Ramnes said:

Patrick Porlan said:

Jorn Ramnes said:

Do Minolta have a program where i can test for dead pixels ? Can i
test for dead pixels in DIVU ? I have a D7 camera.

Click to expand...

Have a look to http://home-4.tiscali.nl/~t800373/

-- Patrick

Click to expand...

I've downlade the software and i'll try it later.

--
Jorn

Click to expand...

I tried the D7CCD program, and it reported this at ISO 100, S 4"0:

PICT0001.MRW
ISO 100, S 4"0
G X=80 Y=1501 Gb: 127
G X=84 Y=1125 Gb: 919
R X=2480 Y=1866 R: 134

I'll try more later, thank you.
--Jorn

Jorn Ramnes said:

Jorn Ramnes said:

Patrick Porlan said:

Jorn Ramnes said:

Do Minolta have a program where i can test for dead pixels ?

Click to expand...

Click to expand...

Click to expand...

Click to expand...

Surely they have for servicing but if you ask for the probably will say:

"Dead pixel? Never heard... what's this? Minolta produces only high quality cameras!" ;-)

Jorn Ramnes said:

Jorn Ramnes said:

Jorn Ramnes said:

Jorn Ramnes said:

Can i test for dead pixels in DIVU ? I have a D7 camera.

Click to expand...

Click to expand...

Click to expand...

Click to expand...

Only by visual inspection. Shoot the images in raw-mode or s-fine-mode (TIFF) with full resolution. JPEG results in "smearing" single pixels (dead pixels too) because of the compression.

Jorn Ramnes said:

Jorn Ramnes said:

Jorn Ramnes said:

Have a look to http://home-4.tiscali.nl/~t800373/

Click to expand...

Click to expand...

Click to expand...

Nice, well done program (hi, Jake ;-).
But watch out for the threshold settings.

For detecting dead pixels set at about 3900 (almost full brightness of the single pixel). Thresholds below (say 500 or so) results in showing "warm" pixels too.

Jorn Ramnes said:

I tried the D7CCD program, and it reported this at ISO 100, S 4"0:

PICT0001.MRW
ISO 100, S 4"0
G X=80 Y=1501 Gb: 127
G X=84 Y=1125 Gb: 919
R X=2480 Y=1866 R: 134

Click to expand...

That's not bad!
The only one which I would be concerned by is the G X=84 Y=1125 Gb: 919.

But the value 919 is far away from full brightness (12bit full range =4095) and if the value decreases at shorter shutter times (or even disappears) it's only a "hot" pixel. Real dead pixels are visable at all shutter times (the pixel is defective). So you also have to test a few images at shorter exposure times. Hot and warm pixels differ more or less from the rest pixels in sensitivity or noise level. The longer exposure time or the larger ISO setting the more the warm or hot pixels differs from the rest so they will be more visable in the image.
Hope that explanation helps...
--best regardsTom

After shooting at ISO 100 at 26 shutter speeds,
my camera came with the following output:

PICT0026.MRW
ISO 100, S 4"0

PICT0002.MRW
ISO 100, S 1/1500
G X=327 Y=172 Gr: 35
G X=410 Y=511 Gb: 36
B X=557 Y=475 B: 42

PICT0003.MRW
ISO 100, S 1/1000
G X=327 Y=172 Gr: 64
B X=557 Y=475 B: 47

PICT0004.MRW
ISO 100, S 1/750
G X=327 Y=172 Gr: 60
B X=557 Y=475 B: 36

PICT0005.MRW
ISO 100, S 1/500
G X=327 Y=172 Gr: 65

PICT0006.MRW
ISO 100, S 1/350
B X=557 Y=475 B: 45

PICT0007.MRW
ISO 100, S 1/250
G X=327 Y=172 Gr: 64

PICT0008.MRW
ISO 100, S 1/180
G X=327 Y=172 Gr: 76
B X=557 Y=475 B: 53

PICT0009.MRW
ISO 100, S 1/125
G X=327 Y=172 Gr: 68
B X=557 Y=475 B: 56

PICT0010.MRW
ISO 100, S 1/90
G X=327 Y=172 Gr: 80

PICT0011.MRW
ISO 100, S 1/60
G X=327 Y=172 Gr: 94
B X=557 Y=475 B: 63

PICT0012.MRW
ISO 100, S 1/45
G X=327 Y=172 Gr: 85
B X=557 Y=475 B: 61

PICT0013.MRW
ISO 100, S 1/30

PICT0014.MRW
ISO 100, S 1/20
G X=327 Y=172 Gr: 101

PICT0015.MRW
ISO 100, S 1/15

PICT0016.MRW
ISO 100, S 1/10
G X=327 Y=172 Gr: 100

PICT0017.MRW
ISO 100, S 1/8
G X=327 Y=172 Gr: 117

PICT0018.MRW
ISO 100, S 1/6

PICT0019.MRW
ISO 100, S 1/4

PICT0020.MRW
ISO 100, S 1/3

PICT0021.MRW
ISO 100, S 0"5

PICT0022.MRW
ISO 100, S 0"7

PICT0023.MRW
ISO 100, S 1"0

PICT0024.MRW
ISO 100, S 2"0

PICT0025.MRW
ISO 100, S 3"0

PICT0001.MRW
ISO 100, S 1/2000
G X=327 Y=172 Gr: 57
B X=557 Y=475 B: 42

--Jorn