CMV2000 datasheet(36/64 Pages) AMSCO

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Reference: CMV2000-datasheet-v3.8

CMV2000 v3 Datasheet

Page 35 of 63

5.4 IMAGE FLIPPING

The image coming out of the image sensor can be flipped in X (per channel) and/or Y direction. When flipping in Y is

enabled, the bottom left pixel (0,1087) is read out first instead of the top left pixel (0,0). When flipping in X is enabled,

only the pixels within a channel are mirrored, not the channels themselves. In this case, the first row in channel 1 to be

read out is pixel (1023,0) to pixel (0,0). In channel 2, this is pixel (2047,0) to pixel (1024,0).

2048x1088

Pixel (0,0)

Pixel (2047,1087)

2048x1088

Pixel (0,0)

Pixel (2047,1087)

Image flipping in Y

CH1

(1024x1088)

Pixel (0,0)

Pixel (1023,1087)

CH2

(1024x1088)

Pixel (1024,0)

Pixel (2047,1087)

CH1

(1024x1088)

Pixel (0,0)

Pixel (1023,1087)

CH2

(1024x1088)

Pixel (1024,0)

Pixel (2047,1087)

Image flipping in X

Using 2 output

channels

Pixel (0,1087)

Pixel (2047,0)

2048x1088

Pixel (0,0)

Pixel (2047,1087)

Image flipping in Y

CH1

(1024x1088)

Pixel (0,0)

Pixel

(1023,1087)

CH2

(1024x1088)

Pixel (1024,0)

Pixel

(2047,1087)

CH1

(1024x1088)

Pixel (1023,0)

Pixel

(0,1087)

CH2

(1024x1088)

Pixel (2047,0)

Pixel

(1024,1087)

Image flipping in X

Using 2 output

channels

Pixel (0,1087)

Pixel (2047,0)

Pixel (0,0)

Pixel (2047,0)

Pixel

(0,1087)

Pixel (1023,0)

Pixel

(1024,1087)

Pixel (2047,1087)

Pixel (1024,0)

Pixel

(2047,1087)

Pixel (0,0)

Pixel

(1023,1087)

FIGURE 40: IMAGE FLIPPING

Image flipping

Default value

Description of the value

Image_flipping

40[1:0]

0: No image flipping

1: Image flipping in X

2: Image flipping in Y

3: Image flipping in X and Y

5.5 IMAGE SUBSAMPLING

To maintain the same field of view but reduce the amount of data coming out of the sensor, a subsampling mode is

implemented on the chip. Different subsampling schemes can be programmed by setting the appropriate registers.

These subsampling schemes can take into account whether a color or monochrome sensor is used to preserve the Bayer

pattern information. The registers involved in subsampling are detailed below. A distinction is made between a simple

and advanced mode (can be used for color devices). Subsampling can be enabled in every windowing mode.

5.5.1 SIMPLE SUBSAMPLING

Image subsampling - simple

Default value

Description of the value

Number_lines

1[7:0]

2[7:0]

1088

Defines the total number of lines read-out by the sensor

(min=1, max=1088)

Sub_s

35[7:0]

36[7:0]

Number of rows to skip (min=0, max=1086)

Sub_a

37[7:0]

38[7:0]

Identical to Sub_s

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