OV2640 Camera Module Software Application Notes
Table of Contents
OV2640 Camera Module..................................................................................................................... 1
Software Application Notes................................................................................................................. 1
1. How to Select Output format?..................................................................................................... 4
1.1 Back-end with full ISP.......................................................................................................... 4
1.2 Back-end with YCbCr ISP.................................................................................................... 5
1.3 Back-end without ISP........................................................................................................... 5
1.4 Equations to Convert from One Format to Another............................................................. 5
2. How to Select Output Resolution?...............................................................................................6
2.1 back-end with ISP................................................................................................................. 6
2.2 back-end without ISP............................................................................................................ 6
3. How to Adjust frame rate.............................................................................................................6
3.1 SVGA Preview, 30fps, 24Mhz input clock...........................................................................6
3.2 SVGA Preview, 15fps, 24 Mhz input clock..........................................................................7
3.3 SVGA Preview, 25fps, 24 Mhz input clock..........................................................................7
3.4 SVGA Preview, 14.3fps, 24 Mhz input clock.......................................................................7
3.5 UXGA Capture, 7.5fps, 24 Mhz input clock........................................................................ 7
3.6 UXGA Capture, 7.14fps, 24 Mhz input clock...................................................................... 8
4. How to set Night Mode Preview..................................................................................................8
4.1 Night Mode with Fixed Frame Rate..................................................................................... 8
4.2 Night Mode with Auto Frame Rate.......................................................................................8
5. How to Remove Light Band in Preview Mode............................................................................9
5.1 Light Band.............................................................................................................................9
5.2 Remove Light band............................................................................................................. 10
5.3 Select Banding Filter by Region Information..................................................................... 10
5.4 Select Banding Filter by Automatic Light Frequency Detection........................................11
5.5 Remove Light Band in Capture.......................................................................................... 11
5.6 When Light Band can not be Removed.............................................................................. 12
6. White Balance............................................................................................................................12
6.1 Simple White Balance.........................................................................................................12
6.2 Advanced White Balance....................................................................................................12
6.3 How to select?..................................................................................................................... 13
7. Defect Pixel Correction............................................................................................................. 13
8. BLC............................................................................................................................................13
9. Video Mode............................................................................................................................... 13
10. Digital zoom............................................................................................................................ 14
11. OV2640 Functions...................................................................................................................14
11.1 Light Mode........................................................................................................................14
11.2 Color Saturation................................................................................................................ 15
11.3 Brightness..........................................................................................................................16
11.4 Contrast............................................................................................................................. 17
11.5 Special effects................................................................................................................... 18
11.6 YUV Sequence..................................................................................................................20
12. Deal with Lens......................................................................................................................... 21
12.1 Light fall off...................................................................................................................... 21
12.2 Dark corner....................................................................................................................... 21
12.3 Resolution......................................................................................................................... 21
2 Company Confidential
