黑群l晖lcd4linux,LCD - linux-sunxi.org-程序员宅基地
技术标签： 黑群l晖lcd4linux
Allwinner SoCs can output display signals to LCD panels.
For devices with LCD displays, the resolution and timing values
can be found in the FEX file.
Software
Mainline U-Boot
Support for LCD displays is available in mainline U-boot, starting from release v2015.04.
FEX conversion rules
The timing definitions and values are slightly different from the FEX files.
The following is a translation table.
Value
CONFIG_DM_VIDEO
CONFIG_VIDEO_LCD_MODE
FEX file values
Notes
Horizontal resolution (pixels)
hactive
x
lcd_x
Vertical Resolution (pixels)
vactive
y
lcd_y
Color depth / format
data-mapping
depth
lcd_frm:0 => depth:24 (to be verified)
lcd_frm:1 => depth:18
Pixel Clock (KHz)
clock-frequency (Hz)
pclk_khz
lcd_dclk_freq * 1000
Horizontal Sync Length
hsync-len
hs
lcd_hv_hspw (with a minimum of 1)
Vertical Sync Length
vsync-len
vs
lcd_hv_vspw (with a minimum of 1)
Left Margin (Horizontal back porch)
hback-porch
le
lcd_hbp - hs
Right Margin (Horizontal front porch)
hfront-porch
ri
lcd_ht - lcd_x - lcd_hbp
Top Margin (Vertical back porch)
vback-porch
up
lcd_vbp - vs
Bottom Margin (Vertical front porch)
vfront-porch
lo
sun[457i]: (lcd_vt / 2) - lcd_y - lcd_vbp
sun8i: lcd_vt - lcd_y - lcd_vbp
u-boot SYNC flags
NA
sync:3
NA
u-boot VMODE flags
NA
vmode:0
NA
Mainline Linux (simple-panel)
Conversion from LCD timing from u-boot configuration string to struct drm_display_mode in mainline kernel:
CONFIG_VIDEO_LCD_MODE="x:1024,y:768,depth:18,pclk_khz:100000,le:799,ri:260,up:15,lo:16,hs:1,vs:1,sync:3,vmode:0"
static const struct drm_display_mode unknown_display = {
.clock = 100000, // pclk_khz (FEX: lcd_dclk_freq * 1000)
.hdisplay = 1024, // x (FEX: lcd_x)
.hsync_start = 1024 + 260, // x + ri
.hsync_end = 1024 + 260 + 1, // x + ri + hs
.htotal = 1024 + 260 + 1 + 799, // x + ri + hs + le (FEX: lcd_ht)
.vdisplay = 768, // y (FEX: lcd_y)
.vsync_start = 768 + 16, // y + lo
.vsync_end = 768 + 16 + 1, // y + lo + vs
.vtotal = 768 + 16 + 1 + 15, // y + lo + vs + up (FEX: lcd_vt / 2)
.vrefresh = 60, //
};
Example timing calculation from a INNOLUX EJ070NA-01J 7inch LVDS LCD datasheet (tested on DS167 board):
Corresponding u-boot configuration string:
CONFIG_VIDEO_LCD_MODE="x:1024,y:600,depth:18,pclk_khz:51000,le:22,ri:297,up:1,lo:33,hs:1,vs:1,sync:3,vmode:0"
Note: Some values above such as pclk, le, ri,lo...etc have margins as seen from above datasheet. You may get perfectly fine picture if you set ri=296 instead of ri=297 here. You might experience visual artifacts if your settings are beyond defined limits in the datasheet.
Script for automated conversion
The following ruby script takes fex file name as a command line parameter and produces the corresponding config line for u-boot according to the rules from the table above.
Here is the ruby script (click on the 'Expand' link to see it):
#!/usr/bin/env ruby
if !ARGV[0] || !File.exists?(ARGV[0]) then
abort "Usage: ruby #{__FILE__} [fex_file_name]\n"
end
def parse_fex_section(filename, section)
results = {}
current_section = ""
File.open(filename).each_line {|l|
current_section = $1 if l =~ /^\[(.*?)\]/
next if current_section != section
results[$1] = $2.strip if l =~ /^(\S+)\s*\=\s*(.*)/
results[$1] = $2.to_i if l =~ /^(\S+)\s*\=\s*(\d+)\s*$/
}
return results
end
def print_video_lcd_mode(lcd0_para, vt_div)
x = lcd0_para["lcd_x"]
y = lcd0_para["lcd_y"]
depth = { 0 => 24, 1 => 18 }[lcd0_para["lcd_frm"]]
pclk_khz = lcd0_para["lcd_dclk_freq"] * 1000
hs = [1, (lcd0_para["lcd_hv_hspw"] || lcd0_para["lcd_hspw"])].max
vs = [1, (lcd0_para["lcd_hv_vspw"] || lcd0_para["lcd_vspw"])].max
le = lcd0_para["lcd_hbp"] - hs
ri = lcd0_para["lcd_ht"] - x - lcd0_para["lcd_hbp"]
up = lcd0_para["lcd_vbp"] - vs
lo = lcd0_para["lcd_vt"] / vt_div - y - lcd0_para["lcd_vbp"]
abort "Unsupported 'lcd_frm' parameter" if !depth
printf("CONFIG_VIDEO_LCD_MODE=\"" +
"x:#{x},y:#{y},depth:#{depth},pclk_khz:#{pclk_khz}," +
"le:#{le},ri:#{ri},up:#{up},lo:#{lo},hs:#{hs},vs:#{vs}," +
"sync:3,vmode:0\"\n")
end
lcd0_para = parse_fex_section(ARGV[0], "lcd0_para")
abort "Not a valid 'lcd0_para' section" if lcd0_para["lcd_used"] != 1
printf("== for sun[457]i ==\n")
print_video_lcd_mode(lcd0_para, 2)
printf("\n== for sun[68]i ==\n")
print_video_lcd_mode(lcd0_para, 1)
Dithering test program
If in doubt regarding 18-bit vs. 24-bit depth, it is possible to compile and run on the device the following simple test program. It should show a smooth gradient picture. If the gradient looks blocky, then the depth most likely needs to be changed to 18.
Here is the C source code (click on the 'Expand' link to see it):
/* gcc -O2 -o fbgradient fbgradient.c */
#include
#include
#include
#include
#include
#include
int main()
{
int fd, x, y;
uint32_t *fb;
struct fb_fix_screeninfo finfo;
struct fb_var_screeninfo vinfo;
if ((fd = open("/dev/fb0", O_RDWR)) == -1) {
printf("Can't open /dev/fb0\n");
return 1;
}
if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo)) {
printf("FBIOGET_FSCREENINFO failed\n");
return 1;
}
if (ioctl(fd, FBIOGET_VSCREENINFO, &vinfo)) {
printf("FBIOGET_VSCREENINFO failed\n");
return 1;
}
if (vinfo.bits_per_pixel != 32) {
printf("Only 32bpp framebuffer is supported\n");
return 1;
}
fb = mmap(0, finfo.smem_len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (fb == (void *)-1) {
printf("mmap failed\n");
return 1;
}
for (y = 0; y < vinfo.yres; y++)
for (x = 0; x < vinfo.xres; x++)
fb[y * vinfo.xres + x] = (255 * x / vinfo.xres) * 0x000100 +
(255 * y / vinfo.yres) * 0x010001;
return 0;
}
Bulk automatic conversion of all FEX files from the sunxi-boards repository
The results of automatic FEX files conversion are listed in the table below. The CONFIG_VIDEO_LCD_MODE line should be accurate and calculated exactly as described in the first section of this page. But the GPIO settings need careful human review. "Green" settings are likely to be usable as-is. "Yellow" most definitely need some tweaks. "Orange" are impossible to support with the current u-boot code.SoC
Device info
FEX file
CONFIG_VIDEO_LCD_MODE u-boot settings
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:24,pclk_khz:33000,le:45,ri:209,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:24,pclk_khz:33000,le:45,ri:209,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:16,ri:209,up:22,lo:24,hs:30,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
CONFIG_VIDEO_LCD_POWER="PB9"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:1024,y:600,depth:18,pclk_khz:45000,le:150,ri:16,up:21,lo:2,hs:10,vs:2,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
CONFIG_VIDEO_LCD_POWER="PB9"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:16,ri:209,up:22,lo:22,hs:30,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
CONFIG_VIDEO_LCD_POWER="PB9"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:600,depth:18,pclk_khz:40000,le:88,ri:40,up:19,lo:5,hs:128,vs:4,sync:3,vmode:0"
CONFIG_VIDEO_LCD_MODE="x:1024,y:600,depth:18,pclk_khz:45000,le:150,ri:16,up:21,lo:2,hs:10,vs:2,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="AXP0-0"
CONFIG_VIDEO_LCD_BL_EN="AXP0-1"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:16,ri:209,up:22,lo:22,hs:30,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="AXP0-0"
CONFIG_VIDEO_LCD_BL_EN="AXP0-1"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:600,depth:18,pclk_khz:40000,le:88,ri:40,up:19,lo:5,hs:128,vs:4,sync:3,vmode:0"
CONFIG_VIDEO_LCD_MODE="x:1024,y:600,depth:18,pclk_khz:45000,le:150,ri:16,up:21,lo:2,hs:10,vs:2,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PB10"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:16,ri:209,up:22,lo:22,hs:30,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PB10"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:39,ri:88,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="AXP0-0"
CONFIG_VIDEO_LCD_BL_EN="AXP0-1"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:16,ri:209,up:22,lo:22,hs:30,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:16,ri:209,up:22,lo:22,hs:30,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:24,pclk_khz:33000,le:45,ri:209,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:1024,y:600,depth:18,pclk_khz:45000,le:150,ri:16,up:21,lo:2,hs:10,vs:2,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:16,ri:209,up:22,lo:22,hs:30,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:24,pclk_khz:33000,le:45,ri:209,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:40000,le:87,ri:112,up:38,lo:141,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:45,ri:82,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="AXP0-0"
CONFIG_VIDEO_LCD_BL_EN="AXP0-1"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:320,y:240,depth:24,pclk_khz:7000,le:38,ri:20,up:15,lo:4,hs:30,vs:3,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH12"
CONFIG_VIDEO_LCD_BL_EN="PH8"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:24,pclk_khz:30000,le:40,ri:40,up:29,lo:13,hs:48,vs:3,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH12"
CONFIG_VIDEO_LCD_BL_EN="PH8"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:1024,y:600,depth:24,pclk_khz:55000,le:100,ri:170,up:10,lo:15,hs:50,vs:10,sync:3,vmode:0"
CONFIG_VIDEO_LCD_PANEL_LVDS=y
CONFIG_VIDEO_LCD_POWER="PH12"
CONFIG_VIDEO_LCD_BL_EN="PH8"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:320,y:240,depth:24,pclk_khz:7000,le:38,ri:20,up:15,lo:4,hs:30,vs:3,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH12"
CONFIG_VIDEO_LCD_BL_EN="PH8"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:24,pclk_khz:30000,le:40,ri:40,up:29,lo:13,hs:48,vs:3,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH12"
CONFIG_VIDEO_LCD_BL_EN="PH8"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:1024,y:600,depth:24,pclk_khz:55000,le:100,ri:170,up:10,lo:15,hs:50,vs:10,sync:3,vmode:0"
CONFIG_VIDEO_LCD_PANEL_LVDS=y
CONFIG_VIDEO_LCD_POWER="PH12"
CONFIG_VIDEO_LCD_BL_EN="PH8"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:1024,y:600,depth:24,pclk_khz:51000,le:45,ri:274,up:22,lo:12,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_PANEL_LVDS=y
CONFIG_VIDEO_LCD_POWER="PH2"
CONFIG_VIDEO_LCD_BL_EN="PH9"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:1024,y:768,depth:24,pclk_khz:51000,le:19,ri:300,up:6,lo:31,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_PANEL_LVDS=y
VIDEO_LCD_HITACHI_TX18D42VM=y
VIDEO_LCD_SPI_CS="PA0"
VIDEO_LCD_SPI_SCLK="PA1"
VIDEO_LCD_SPI_MOSI="PA2"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:214,ri:40,up:33,lo:11,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:600,depth:18,pclk_khz:45000,le:85,ri:170,up:38,lo:11,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:1024,y:768,depth:18,pclk_khz:100000,le:479,ri:544,up:5,lo:26,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
CONFIG_VIDEO_LCD_PANEL_LVDS=y
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:24,pclk_khz:33000,le:45,ri:209,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:24,pclk_khz:33000,le:45,ri:209,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:24,pclk_khz:33000,le:45,ri:209,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:1024,y:768,depth:24,pclk_khz:64000,le:198,ri:120,up:21,lo:15,hs:2,vs:2,sync:3,vmode:0"
CONFIG_VIDEO_LCD_PANEL_LVDS=y
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:87,ri:40,up:31,lo:13,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="AXP0-0"
CONFIG_VIDEO_LCD_BL_EN="AXP0-1"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:24,pclk_khz:33000,le:45,ri:209,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:1024,y:600,depth:24,pclk_khz:45000,le:159,ri:16,up:22,lo:12,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:24,pclk_khz:33000,le:45,ri:209,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:42000,le:110,ri:386,up:22,lo:130,hs:48,vs:3,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:39000,le:5,ri:83,up:20,lo:22,hs:40,vs:3,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="AXP0-0"
CONFIG_VIDEO_LCD_BL_EN="AXP0-1"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:24,pclk_khz:33000,le:40,ri:40,up:29,lo:13,hs:48,vs:3,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:1024,y:600,depth:24,pclk_khz:51000,le:45,ri:274,up:22,lo:12,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_PANEL_LVDS=y
CONFIG_VIDEO_LCD_POWER="PH2"
CONFIG_VIDEO_LCD_BL_EN="PH9"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:1024,y:768,depth:18,pclk_khz:65000,le:120,ri:180,up:22,lo:13,hs:20,vs:3,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:24,pclk_khz:33000,le:45,ri:209,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:45,ri:209,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
CONFIG_VIDEO_LCD_POWER="AXP0-0"
CONFIG_VIDEO_LCD_BL_EN="AXP0-1"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:45,ri:209,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
CONFIG_VIDEO_LCD_POWER="AXP0-0"
CONFIG_VIDEO_LCD_BL_EN="AXP0-1"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:1024,y:600,depth:18,pclk_khz:51000,le:138,ri:162,up:22,lo:10,hs:20,vs:3,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:1280,y:800,depth:18,pclk_khz:69000,le:19,ri:118,up:9,lo:6,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_PANEL_LVDS=y
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:1024,y:600,depth:24,pclk_khz:52000,le:32,ri:287,up:22,lo:12,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_PANEL_LVDS=y
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:1024,y:600,depth:24,pclk_khz:51000,le:157,ri:160,up:20,lo:12,hs:3,vs:3,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:24,pclk_khz:33000,le:45,ri:209,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:24,pclk_khz:33000,le:45,ri:209,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:24,pclk_khz:33000,le:45,ri:209,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH11"
CONFIG_VIDEO_LCD_BL_EN="PH12"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:24,pclk_khz:33000,le:45,ri:209,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:1024,y:600,depth:18,pclk_khz:60000,le:60,ri:160,up:13,lo:12,hs:100,vs:10,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:45,ri:210,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="AXP0-0"
CONFIG_VIDEO_LCD_BL_EN="AXP0-1"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:1366,y:768,depth:18,pclk_khz:70000,le:53,ri:20,up:22,lo:17,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
CONFIG_VIDEO_LCD_PANEL_LVDS=y
CONFIG_VIDEO_LCD_POWER="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:24,pclk_khz:33000,le:45,ri:209,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:1024,y:768,depth:18,pclk_khz:100000,le:480,ri:260,up:6,lo:16,hs:320,vs:10,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
CONFIG_VIDEO_LCD_PANEL_LVDS=y
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:1024,y:768,depth:18,pclk_khz:100000,le:480,ri:260,up:6,lo:16,hs:320,vs:10,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
CONFIG_VIDEO_LCD_PANEL_LVDS=y
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:45,ri:210,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="AXP0-0"
CONFIG_VIDEO_LCD_BL_EN="AXP0-1"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:30000,le:45,ri:79,up:22,lo:13,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="AXP0-0"
CONFIG_VIDEO_LCD_BL_EN="AXP0-1"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:1024,y:768,depth:18,pclk_khz:100000,le:480,ri:260,up:6,lo:16,hs:320,vs:10,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
CONFIG_VIDEO_LCD_PANEL_LVDS=y
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:45,ri:82,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="AXP0-0"
CONFIG_VIDEO_LCD_BL_EN="AXP0-1"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:24,pclk_khz:33000,le:45,ri:209,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:87,ri:40,up:31,lo:13,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="AXP0-0"
CONFIG_VIDEO_LCD_BL_EN="AXP0-1"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:87,ri:40,up:31,lo:13,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="AXP0-0"
CONFIG_VIDEO_LCD_BL_EN="AXP0-1"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:24,pclk_khz:33000,le:45,ri:210,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:2,ri:78,up:29,lo:13,hs:48,vs:3,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="AXP0-0"
CONFIG_VIDEO_LCD_BL_EN="AXP0-1"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:24,pclk_khz:33000,le:45,ri:209,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:1024,y:600,depth:24,pclk_khz:63000,le:32,ri:287,up:22,lo:12,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
CONFIG_VIDEO_LCD_PANEL_LVDS=y
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:1366,y:768,depth:18,pclk_khz:75000,le:12,ri:171,up:12,lo:25,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
CONFIG_VIDEO_LCD_PANEL_LVDS=y
# warning: contradicting 'lcd_pwm_used' and 'lcd_pwm_not_used'
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:65000,le:45,ri:82,up:22,lo:547,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
# warning: could not decode 'lcd_power' (port:power2<1><0><1>)
CONFIG_VIDEO_LCD_BL_EN="PM1"
CONFIG_VIDEO_LCD_BL_PWM="PH13"
CONFIG_VIDEO_LCD_MODE="x:768,y:1024,depth:18,pclk_khz:66000,le:56,ri:60,up:30,lo:36,hs:64,vs:50,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
# warning: 'lcd_gpio_0' = 'port:PA06<1><0><1>'
# warning: 'lcd_gpio_1' = 'port:PA07<1><0><1>'
# warning: 'lcd_gpio_2' = 'port:PH24<1><0><0>'
# warning: 'lcd_gpio_3' = 'port:PA05<1><0><1>'
# warning: 'lcd_gpio_4' = 'port:PH23<1><0><0>'
# warning: 'lcd_gpio_5' = 'port:PH22<1><0><0>'
CONFIG_VIDEO_LCD_MODE="x:1024,y:768,depth:24,pclk_khz:100000,le:799,ri:260,up:15,lo:16,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_PANEL_LVDS=y
# warning: unsupported 'lcd_lvds_mode' : 1
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:45,ri:209,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
# warning: could not decode 'lcd_power' (port:power2<1><0><1>)
CONFIG_VIDEO_LCD_BL_EN="PH6"
CONFIG_VIDEO_LCD_BL_PWM="PH0"
# warning: 'lcd_gpio_0' = 'port:PH07<1><0><1>'
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:87,ri:167,up:31,lo:13,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
# warning: could not decode 'lcd_power' (port:power2<1><0><1>)
CONFIG_VIDEO_LCD_BL_EN="PH6"
CONFIG_VIDEO_LCD_BL_PWM="PH0"
# warning: 'lcd_gpio_0' = 'port:PH07<1><0><1>'
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:45,ri:209,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
# warning: could not decode 'lcd_power' (port:power2<1><0><1>)
CONFIG_VIDEO_LCD_BL_EN="PH6"
CONFIG_VIDEO_LCD_BL_PWM="PH0"
# warning: 'lcd_gpio_0' = 'port:PH07<1><0><1>'
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:87,ri:168,up:31,lo:13,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
# warning: could not decode 'lcd_power' (port:power2<1><0><1>)
CONFIG_VIDEO_LCD_BL_EN="PH6"
CONFIG_VIDEO_LCD_BL_PWM="PH0"
# warning: 'lcd_gpio_0' = 'port:PH07<1><0><1>'
CONFIG_VIDEO_LCD_MODE="x:1024,y:600,depth:18,pclk_khz:51000,le:138,ri:162,up:22,lo:10,hs:20,vs:3,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
# warning: contradicting 'lcd_pwm_used' and 'lcd_pwm_not_used'
CONFIG_VIDEO_LCD_MODE="x:1920,y:1080,depth:24,pclk_khz:148000,le:19,ri:260,up:19,lo:25,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_PANEL_LVDS=y
# warning: unsupported 'lcd_lvds_ch' : 1
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_MODE="x:768,y:1024,depth:18,pclk_khz:66000,le:56,ri:60,up:30,lo:36,hs:64,vs:50,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
# warning: could not decode 'lcd_power' (port:power2<1><0><1>)
CONFIG_VIDEO_LCD_BL_EN="PA25"
CONFIG_VIDEO_LCD_BL_PWM="PH13"
# warning: 'lcd_gpio_0' = 'port:PH10<1><0><2><1>'
# warning: 'lcd_gpio_1' = 'port:PH11<1><0><2><1>'
# warning: 'lcd_gpio_2' = 'port:PA26<1><0><2><1>'
# warning: 'lcd_gpio_3' = 'port:PH09<1><0><2><1>'
CONFIG_VIDEO_LCD_MODE="x:1024,y:600,depth:18,pclk_khz:66000,le:90,ri:160,up:3,lo:127,hs:70,vs:20,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
# warning: could not decode 'lcd_power' (port:power2<1><0><1>)
CONFIG_VIDEO_LCD_BL_EN="PA25"
CONFIG_VIDEO_LCD_BL_PWM="PH13"
CONFIG_VIDEO_LCD_MODE="x:1024,y:600,depth:24,pclk_khz:70000,le:120,ri:180,up:17,lo:15,hs:20,vs:3,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=0
CONFIG_VIDEO_LCD_PANEL_LVDS=y
# warning: could not decode 'lcd_power' (port:power2<1><0><1>)
CONFIG_VIDEO_LCD_BL_EN="PA25"
CONFIG_VIDEO_LCD_BL_PWM="PH13"
# warning: 'lcd_gpio_0' = 'port:PH10<1><0><2><1>'
# warning: 'lcd_gpio_1' = 'port:PH11<1><0><2><1>'
# warning: 'lcd_gpio_2' = 'port:PA23<1><0><2><0>'
# warning: 'lcd_gpio_3' = 'port:PH09<1><0><2><1>'
CONFIG_VIDEO_LCD_MODE="x:1024,y:768,depth:24,pclk_khz:100000,le:799,ri:260,up:15,lo:16,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_PANEL_LVDS=y
# warning: unsupported 'lcd_lvds_mode' : 1
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
# warning: unsupported 'lcd_if' : 5 (LCD_IF_EDP)
LCD panel
LCD LVDS panels can be found on old notebook or desktop monitor.
Model
Inch
u-boot settings
QD17EL07
17"
CONFIG_VIDEO_LCD_MODE="x:1280,y:1024,depth:24,pclk_khz:108000,le:56,ri:60,up:29,lo:3,hs:10,vs:10,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=1
LTN150XB
15"
CONFIG_VIDEO_LCD_MODE="x:1024,y:768,depth:18,pclk_khz:65000,le:88,ri:24,up:29,lo:3,hs:136,vs:6,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=1
B150XG01
LTD154EX0K
15" 16:9
CONFIG_VIDEO_LCD_MODE="x:1280,y:800,depth:18,pclk_khz:71100,le:88,ri:48,up:15,lo:2,hs:32,vs:6,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=1
HSD121PS11
12.1"
CONFIG_VIDEO_LCD_MODE="x:800,y:600,depth:18,pclk_khz:40000,le:88,ri:40,up:23,lo:1,hs:128,vs:4,sync:3,vmode:0"
CONFIG_VIDEO_LCD_DCLK_PHASE=1
Monitor with vertical size bigger 768 px and 24bit deep need u-boot patch to add lvds dual channel support.
Downloadable LCD panel datasheets
Some of the LCD panel web shops are kind enough to conveniently provide freely downloadable collections of datasheets:
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文章浏览阅读3.2k次。一定时宽的语音信号，其能量的大小随时间有明显的变化。清音段能量比浊音段小得多。短时过零数也可用于语音信号分析中，发浊音时，其语音能量约集中于3kHz以下，而发清音时，多数能量出现在较高频率上。可认为浊音时具有较低的平均过零数，而清音时具有较高的平均过零数，故对一短时语音段计算其短时平均能量及短时平均过零数，就可以区分其中的清音段和浊音段，从而可判别句中清、浊音转变时刻，声母韵母的分界以及无声与有声的分界。这在语音识别中有重要意义。自己编写的matlab代码，对一段语音，取帧长为240个点，计算其平均能_matlab求语音信号短时过零率的函数
Ubuntu服务器创建新用户及解决新用户登录Access denied问题
默认情况下，在Ubuntu上，sudo组的成员被授予sudo访问权限。如果您希望新创建的用户具有管理权限，需要将将用户添加到sudo组。命令将向你询问一系列的问题。密码是必需的，其他字段都是可选的。最后，输入Y确认信息是否正确。执行完上述步骤后需要重启ssh服务，否则新创建的用户连接服务器时会出现。
项目组织战略管理及组织结构_项目组织的具体形态的是战略管理层-程序员宅基地
文章浏览阅读1.7k次。组织战略是组织实施各级项目管理，包括项目组合管理、项目集管理和项目管理的基础。只有从组织战略的高度来思考，思考各个层次项目管理在组织中的位置，才能够理解各级项目管理在组织战略实施中的作用。同时战略管理也为项目管理提供了具体的目标和依据，各级项目管理都需要与组织的战略保持一致。..._项目组织的具体形态的是战略管理层
图像质量评价及色彩处理_图像颜色质量评价-程序员宅基地
文章浏览阅读1k次。目录基本统计量色彩空间变换亮度变换函数白平衡图像过曝的评价指标多视影像因曝光条件不一而导致色彩差异，人眼可以快速区分影像质量，如何利用图像信息辅助算法判断影像优劣。基本统计量灰度均值方差梯度均值方差梯度幅值直方图图像熵p·log(p)色彩空间变换RGB转单通道灰度图像 mean = 225.7 stddev = 47.5mean = 158.5 stddev = 33.2转灰度梯度域gradMean = -0.0008297 / -0.000157461gr_图像颜色质量评价
MATLAB运用规则,利用辛普森规则进行数值积分-程序员宅基地
文章浏览阅读1.4k次。Simpson's rule for numerical integrationZ = SIMPS(Y) computes an approximation of the integral of Y via the Simpson's method (with unit spacing). To compute the integral for spacing different from one..._matlab利用幸普生计算积分
【AI之路】使用huggingface_hub优雅解决huggingface大模型下载问题-程序员宅基地
文章浏览阅读1.2w次，点赞28次，收藏61次。Hugging face 资源很不错，可是国内下载速度很慢，动则GB的大模型，下载很容易超时，经常下载不成功。很是影响玩AI的信心。经过多次测试，终于搞定了下载，即使超时也可以继续下载。真正实现下载无忧！究竟如何实现？且看本文分解。_huggingface_hub