Hand Held Products 4620 User Manual

H - Histogram Stretch:  Increases the contrast of the transmitted image.  Not 
available with some image formats.  

0H

No stretch  

(default)

1H

Histogram stretch

I - Invert Image:  Used to rotate the image around the X or Y axis in fixed 
mount applications where the imager is mounted upside down.

1IX

Invert around the X axis (flips picture upside down)

1IY

Invert around the Y axis (flips picture left to right)

IR - Image Rotate:  

1IR

Rotate image 90 degrees to the right

2IR

Rotate image 180 degrees (upside down)

3IR

Rotate image 90 degrees to the left

J - JPEG Image Quality: Sets the desired quality when the JPEG image 
format is selected.  Higher numbers result in higher quality, but larger files.  
Smaller numbers result in greater amounts of lossy compression, faster 
transmission times, lower quality, but smaller files.  

(Default =  50)

nJ 

Image is compressed as much as possible while preserving quality 

factor of 

n (n = 0 - 100)

0J

worst quality (smallest file)

100J

best quality (largest file)

K - Gamma Correction:  Gamma measures the brightness of midtone values 
produced by the image.  You can brighten or darken an image using gamma 
correction.  A higher gamma correction yields an overall brighter image.  The 
lower the setting, the darker the image.  A setting of 100 results in no 
adjustment to the image.  The optimal setting for text images is 50K. 

0K

Gamma correction off 

(default)

50K

Apply gamma correction for brightening typical document image

nK

Apply gamma correction factor 

n (n = 1-255)