phase 1 & 2 fix pic scale

src-tauri/src/lib.rs

@@ -33,147 +33,75 @@ fn scan_dir(path: String) -> Result<Vec<ImageItem>, String> {
 }
 
 use image::GenericImageView;
-
 use image::Pixel;
 
-
-
 #[derive(serde::Serialize)]
-
 struct ZcaResult {
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     x: f64,
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     y: f64,
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     zone: String, 
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 }
 
-
-
 #[tauri::command]
-
 fn get_zca_suggestion(path: String) -> Result<ZcaResult, String> {
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     let img = image::open(&path).map_err(|e| e.to_string())?;
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     let (width, height) = img.dimensions();
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-    
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     let bottom_start_y = (height as f64 * 0.8) as u32;
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     let zone_height = height - bottom_start_y;
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     let zone_width = width / 3;
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-
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     let zones = [
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         ("Left", 0, bottom_start_y),
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         ("Center", zone_width, bottom_start_y),
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         ("Right", zone_width * 2, bottom_start_y),
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     ];
 
-
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     let mut min_std_dev = f64::MAX;
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     let mut best_zone = "Center";
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     let mut best_pos = (0.5, 0.9); // Default center
 
-
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     for (name, start_x, start_y) in zones.iter() {
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         let mut luma_values = Vec::with_capacity((zone_width * zone_height) as usize);
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-        
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         for y in *start_y..height {
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             for x in *start_x..(*start_x + zone_width) {
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                 if x >= width { continue; } 
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                 let pixel = img.get_pixel(x, y);
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                 let rgb = pixel.to_rgb();
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                 let luma = 0.299 * rgb[0] as f64 + 0.587 * rgb[1] as f64 + 0.114 * rgb[2] as f64;
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                 luma_values.push(luma);
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             }
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         }
 
-
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         let count = luma_values.len() as f64;
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         if count == 0.0 { continue; }
 
-        
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         let mean = luma_values.iter().sum::<f64>() / count;
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         let variance = luma_values.iter().map(|v| (v - mean).powi(2)).sum::<f64>() / count;
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         let std_dev = variance.sqrt();
 
-
-
         if std_dev < min_std_dev {
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             min_std_dev = std_dev;
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             best_zone = name;
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             let center_x_px = *start_x as f64 + (zone_width as f64 / 2.0);
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-            let center_y_px = *start_y as f64 + (zone_height as f64 / 2.0);
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+            // Position closer to bottom (75% of the zone height instead of 50%)
+            // Zone starts at 80%. Height is 20%. 0.8 + 0.2 * 0.75 = 0.95
+            let center_y_px = *start_y as f64 + (zone_height as f64 * 0.75);
             best_pos = (center_x_px / width as f64, center_y_px / height as f64);
-
         }
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     }
 
-
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     Ok(ZcaResult {
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         x: best_pos.0,
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         y: best_pos.1,
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         zone: best_zone.to_string(),
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     })
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 }
 
 
-
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
-
 pub fn run() {
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     tauri::Builder::default()
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         .plugin(tauri_plugin_dialog::init())
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         .invoke_handler(tauri::generate_handler![scan_dir, get_zca_suggestion])
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         .run(tauri::generate_context!())
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         .expect("error while running tauri application");
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 }